Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal
L-arginine-phosphate doped Potassium Dihydrogen Phosphate single crystals with 0.2…4.4 wt.% concentration in the solution were grown on a point seed by the method of temperature reduction. The grown KDP: LAP crystals were characterized by UV-vis spectroscopy, powder XRD analysis, differential therma...
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Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2019
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| Cite this: | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal / E. Kostenyukova, I. Pritula, O. Bezkrovnaya, N. Kovalenko, A. Doroshenko, S. Khimchenko, A. Fedorov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 1. — С. 60-66. — Бібліогр.: 17 назв. — англ. |
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| author | Kostenyukova, E. Pritula, I. Bezkrovnaya, O. Kovalenko, N. Doroshenko, A. Khimchenko, S. Fedorov, A. |
| author_facet | Kostenyukova, E. Pritula, I. Bezkrovnaya, O. Kovalenko, N. Doroshenko, A. Khimchenko, S. Fedorov, A. |
| citation_txt | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal / E. Kostenyukova, I. Pritula, O. Bezkrovnaya, N. Kovalenko, A. Doroshenko, S. Khimchenko, A. Fedorov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 1. — С. 60-66. — Бібліогр.: 17 назв. — англ. |
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| description | L-arginine-phosphate doped Potassium Dihydrogen Phosphate single crystals with 0.2…4.4 wt.% concentration in the solution were grown on a point seed by the method of temperature reduction. The grown KDP: LAP crystals were characterized by UV-vis spectroscopy, powder XRD analysis, differential thermal and thermogravimetric analyses, and second harmonic generation efficiency measurements. The mechanical and laser strength values of LAP-doped KDP crystals have been evaluated. Slight variation in the unit cell parameters of KDP:LAP has been reported. It has been shown that the efficiency of second harmonic generation conversion in KDP:LAP crystals was higher by more than 3-fold as compared to the corresponding values of pure KDP. The experimental results evidence the suitability of the grown KDP:LAP crystals for optoelectronics, and the study is helpful for further searching and designing of hybrid NLO materials.
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ISSN 1560-8034, 1605-6582 (On-line), SPQEO, 2019. V. 22, N 1. P. 60-66.
© 2019, V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
60
Optics
Effect of L-arginine phosphate doping on structural, optical and
strength properties of KDP single crystal
E.I. Kostenyukova
1*
, I.M. Pritula
1
, O.N. Bezkrovnaya
1
, N.O. Kovalenko
1
, A.G. Doroshenko
1
, S.V. Khimchenko
2
,
A.G. Fedorov
2
1
Institute for Single Crystals, SSI “Institute for Single Crystals”, NAS of Ukraine,
60, Nauky Ave., 61001 Kharkov, Ukraine
2
Division of Functional Materials Chemistry, SSI “Institute for Single Crystals“, NAS of Ukraine,
60, Nauky Ave., 61001 Kharkov, Ukraine
Corresponding author e-mail: e.kostenyukova@gmail.com
Abstract. L-arginine-phosphate doped Potassium Dihydrogen Phosphate single crystals
with 0.2…4.4 wt.% concentration in the solution was grown on a point seed by the method
of temperature reduction. The grown KDP:LAP crystals were characterizied by UV-vis
spectroscopy, powder XRD analysis, differential thermal and thermogravimetric analyses
and second harmonic generation efficiency measurements. The mechanical and laser
strength values of LAP doped KDP crystals have been evaluated. Slight variation in the
unit cell parameters of KDP:LAP has been reported. It has been shown that the efficiency
of second harmonic generation conversion in KDP:LAP crystals was higher by more than
3-fold as compared to the corresponding values of pure KDP. The experimental results
evidence the suitability of the grown KDP:LAP crystals for optoelectronics, and the study
is helpful for further searching and designing of hybrid NLO materials.
Keywords: KDP crystals, additives, L-arginine phosphate, optical and structural properties,
nonlinear optic materials.
doi: https://doi.org/10.15407/spqeo22.01.60
PACS 42.70.-a, 61.72.Ss, 61.80.Ed, 77.84.Fa
Manuscript received 02.02.19; revised version received 13.03.19; accepted for publication
27.03.19; published online 30.03.19.
1. Introduction
Potassium Dihydrogen Phosphate (KDP, KH2PO4) single
crystals attract much attention due to their wide
applications in different fields of nonlinear optics,
optoelectronics and photonics. KDP group crystals
possess high structure perfection, mechanical strength,
wide range of spectral transparency, as well as relatively
high values of laser damage threshold. Moreover, the
growth technology makes it possible to obtain KDP
crystals with well-developed growth sectors containing
practically no defects. Nevertheless, relatively low value
of quadratic susceptibility (d36(KDP) = 0.38 pm/V [1]) is
one of the main functional restrictions for using the KDP
crystals. One of the methods for raising the efficiency of
second harmonic generation (SHG) is introduction of
organic molecules, e.g., amino acids, which possess high
nonlinear coefficients, into the matrix of KDP crystal. As
shown by Xue et al. [2], hydrogen bonds (such as O-H
and N-H/O) play a very important role in optical
nonlinearities of inorganic crystals. For instance,
L-arginine phosphate (LAP), a typical NLO semi-organic
crystal, combines the advantages of both inorganic NLO
crystals, e.g., high optical damage threshold, and of
organic NLO crystals, such as considerable optical
nonlinearity [3]. LAP belonging to KDP family
crystals consists of alternating layers of the inorganic
dihydrogen phosphate anionic groups, water molecules
and the organic L-arginine molecules [(H2N)
CNH(CH2)3CH(NH3)COO]+ , held together by plentiful
hydrogen bonds [4]. The organic L-arginine molecule,
the inorganic dihydrogen phosphate anionic group and
the water molecules are all attributed to the NLO
response of the crystal, but the major contribution is
made by intrinsic optical nonlinearity of organic L-
arginine molecule and inorganic dihydrogen phosphate
group [4].
As shown in [5], the efficiency of SHG for KDP
with 0.3 wt.% of L-arginine and KDP with 0.4 wt.% of
L-arginine rises by the factors 1.33 and 1.74,
respectively, in comparison with that of pure KDP. On
the other hand, in a number of studies [6, 7] it has been
revealed that doping with L-arginine and other amino
acids leads to certain decrease of the values of
SPQEO, 2019. V. 22, N 1. P. 60-66.
Kostenyukova E.I., Pritula I.M., Bezkrovnaya O.N. et al. Effect of L-arginine phosphate doping on structural …
61
microhardness for KDP. It is well-known [8] that laser
damage of KDP crystals essentially depends on their
strength characteristics, and it is followed by the
appearance and propagation of microcracks caused by
mechanical or heating pulse in the process of irradiation.
In this work, we studied the influence of LAP
molecules on the optical properties of KDP crystals
grown from the solutions by using the temperature
lowering method. The influence of LAP molecules on the
structural, strength (laser-induced damage threshold and
microhardness) and thermal characteristics of doped
KDP crystals was investigated.
2. Experimental
Pure and doped KDP single crystals were grown from
aqueous solutions (рН4.0 ± 0.1) onto a point seed
measuring 5×5×10 mm by the temperature lowering
method in a 6.0-L crystallizer at a saturation temperature
of 50 °C as described in [9, 10]. LAP
(C6H14N4O2H3PO4·H2O) was used for doping KDP
crystals at the concentrations 0.2, 0.5, 1.0, 2.2 and
4.4 wt.% in the mother liquor (on the weight of KH2PO4
salt). The LAP salt was prepared by mixing of aqueous
solutions of L-arginine powder and orthophosphoric acid
in a stoichiometric ratio. The temperature was lowered at
the rate close to 0.3 °C/day and 0.4…0.8 °C/day for KDP
and KDP:LAP crystals, respectively. The crystals were
grown during 20…45 days (Fig. 1). The average crystal
growth rate was 1.3 and 1.0 mm/day for pure KDP,
2.0…1.0 and 1.5…0.7 mm/day for KDP:LAP crystals in
direction z and xy, respectively. The samples measuring
10×10×10 mm with the sides parallel to the planes (100)
and (001) were cut out from the crystal growth sectors
{100} and {101} of the grown crystals for studies of
their optical transmission, laser and mechanical strength.
The samples of crystals were cut out at the phase
matching angle θ = 59° (Type II, oee) from {101} and
{100} growth sectors for SHG measurements. Then all
the samples were ground and polished.
3. Optical transmission studies
The optical transmission of the crystals was studied
within the spectral range of 200…1100-nm wavelengths
by using a Lambda 35 PerkinElmer spectrophotometer.
KDP and KDP:LAP (0.2, 0.5, 1.0, 2.2 wt.%) crystals
were transparent and did not contain visible inclusions
(Fig. 1). The introduction of LAP additives influenced
the change of crystal morphology. Slight blocking the
{100} faces of the growing crystal as compared to pure
KDP crystal was observed at 4.4 wt.% LAP. The increase
in the concentration of LAP up to 4.4 wt.% also caused
blocking of the {101} faces.
As seen, the transmission of the samples of the pure
and doped crystals is close to ~80…90% within the
region 300…800 nm. On the other hand, the spectra of
the samples cut out from the sectors {100} of pure KDP
and from the sectors {100} and {101} of KDP:LAP
contain absorption bands in the UV region (Fig. 2). The
appearance of the absorption band in the prismatic
growth sector {100} of the nominally pure KDP crystal
Fig. 2. UV-vis-NIR absorption spectra of KDP:LAP crystals for
the sector {101} with LAP concentrations in the mother liquor,
wt. %: 0 (1), 0.2 (3), 1.0 (5), and for the sector {100}: 0 (2),
0.2 (4), 1.0 (6).
a) b) c)
Fig. 1. Photo of KDP:LAP crystals for various concentrations in the mother liquor: 0.2 wt.% (a), 2.2 wt.% (b) and 4.4 wt.% (c).
SPQEO, 2019. V. 22, N 1. P. 60-66.
Kostenyukova E.I., Pritula I.M., Bezkrovnaya O.N. et al. Effect of L-arginine phosphate doping on structural …
62
discussed in a number of papers was attributed to the
impurities of polyvalent metals [11, 12]. Accordingly, in
our case, the absorption band at 270 nm in pure KDP
crystal is related with the background cation impurities
(Fe, Cr, Al, Pb, Mg, Mn etc.) in the initial KH2PO4. The
strong absorption peak is defined by the impurity
concentration, and it does not depend on the type of
cation impurity. As seen, the spectrum of KDP:LAP
crystal contains absorption bands with the maxima at 219
and 270 nm. In our opinion, the presence of intense
absorption bands in the UV region of the spectrum of
KDP:LAP crystal observed for both growth sectors
{101} and {100} is related with the entering of the amino
acid molecules into the matrix. It is confirmed by the fact
that the observed position of the absorption maxima
coincides with that of the absorption bands in the UV
region of the spectrum related with the electron
transitions in L-arginine molecule in the aqueous solution
from the carboxyl group to the carbon chain [4].
The chemical analysis of KDP crystals grown in the
presence of LAP with the concentrations 0.2…4.4 wt.%
showed that the coefficient of incorporation of LAP
molecules into the crystal in both sectors of growth is
0.01…0.017.
4. XRD analysis
The lattice parameters of KDP samples were measured
on a general-purpose X-ray diffractometer using CuKα1
radiation and graphite monochromator in a primary
beam. Possible adjustment errors were minimized by
means of the Bond method [13]. The rocking curves
(RC) were obtained with double crystal spectrometer at
CuKα1 radiation with silicon monochromator adjusted to
the (400) reflection.
The rocking curves and parameters of the crystal
cell a and c of KDP and KDP:LAP crystals were
measured. The study of KDP and KDP:LAP crystals
perfection (2.2 wt.% of LAP, growth sectors {101} and
{101}) showed that the structural perfection of the doped
crystal corresponded to that of pure KDP crystal
(Table 1).
The change in the parameter c of the doped crystal
by 5·10–4 Å in the sector {100} and by 9·10–4 Å in the
sector {101}, and also the change in the parameter a by
Table 1. Full width at half maximum (FWHM) values
measured in рure KDP and KDP:LAP crystals, hkl (008).
Samples FWHM, arc.
sec.
pure KDP, {101}, z 57.0
pure KDP, {100}, z 48.0
KDP:LAP (2.2 wt.% LAP), {101}, z 60.7
KDP:LAP (2.2 wt.% LAP), {100}, z 56.2
4·10-4 Å in the sector {101}, in comparison with that of
pure KDP, perhaps, is caused by the entry of LAP
molecules into the crystal lattice of KDP (Table 2). Thus,
KDP:LAP (2.2 wt.% of LAP) crystal is characterized by
a “contraction” of the unit cell along the directions [001]
and [100] in the sector {101}, and also along the
direction [001] in the sector {001} in comparison with
pure KDP crystal.
5. Laser-induced damage threshold and
microhardness
The laser-induced damage threshold (LIDT) and Vicker’s
microhardness (HV) of the samples of pure KDP and
KDP:LAP crystals were studied as described in [9, 10].
LIDT was investigated at the fundamental wavelength of
YAG:Nd3+ laser operating at λ = 1.06 µm. The laser
damage criterion was a spark of high-temperature glow
visually observed at the crystal breakdown. Vicker’s
microhardeness is a good parameter to determine the
firmness degree of matters. This test was performed
using the crystal KDP of size 10×10×10 mm.
Measurements were carried out with the PMT-3 tester
fixed to a Vicker’s diamond pyramidal indenter attached
to a microscope. Test was made on the (100) and (001)
faces of crystal in the load range 10…200 g for 10 s.
The results of the effect of LAP on the mechanical
and laser strength (Fig. 3, Table 3) of the doped crystals
showed that the effect of dopant on the properties of
KDP in the {101} and {100} sectors is different. Doping
the crystal with LAP molecules (concentration of
0.2…1 wt.%) led to an increase in the microhardness in
the {101} sector by 8% and a slight decrease in the
microhardness at the additive concentration 0.2 wt.% in
the {100} sector. The increase in the concentration of the
additive to 1 mass.% contributed to the hardening of the
crystal in the {100} sector.
KDP:LAP crystals, as well as KDP:L-arginine
crystals [14], are characterized by somewhat larger
microhardness values measured on (001) faces as
compared to those for (100) faces. A similar change in
the hardening of the faces was observed in [15] for a
KDP crystal doped with urea.
Addition of LAP slightly reduced the laser strength
of the KDP crystal in both growth sectors (Table 3),
Table 2. Crystal lattice parameters of рure KDP and KDP:LAP
(2.2 wt.% LAP) crystals.
Crystals c, Å a, Å ∆c, Å ∆a, Å
Pure KDP,{101} 6.9734 7.4528 – –
Pure KDP,{001} 6.9732 7.4526 – –
KDP:LAP,{101} 6.9725 7.4524 –9·10–4 –4·10–4
KDP:LAP,{001} 6.9727 7.4526 –5·10–4 0
SPQEO, 2019. V. 22, N 1. P. 60-66.
Kostenyukova E.I., Pritula I.M., Bezkrovnaya O.N. et al. Effect of L-arginine phosphate doping on structural …
63
whereas in [9, 14] we showed that addition of L-arginine
promoted an increase in the laser strength of KDP in the
{101} sector and a decrease in the {100} one. A certain
discrepancy between the mechanical and laser strength of
all the doped crystals (KDP:L-arginine, KDP:NN'DU,
KDP:LAP) is caused by differences in the conditions of
formation of mechanical and laser damage in the crystal.
The microhardness values of doped crystals, as compared
to those in pure KDP, increase, and the laser strength
slightly decreases. It may be related with the fact that the
entry of LAP into the crystal leads to appearance of
stresses in the lattice, which relax with appearance of
additional defects in the crystal (dislocations). The
movement of dislocations in the process of deformation
with the indenter is difficult: the values of microhardness
increase. At the same time, additional defects introduced
into the lattice of the doped crystal enable to reduce its
laser strength.
6. SHG measurements
The NLO properties of the crystals were studied using
YAG:Nd3+ laser at λ = 1.064 µm as described in [10]
(with 1 Hz pulse frequency, 7 ns pulse duration, 1 mm
laser beam diameter). The samples of pure and doped
KDP crystals were cut off at the phase matching angle
θ = 59° (Type II, oee) from {101} and {100} growth
sectors. The experiments were repeated for different
input powers, and the corresponding output power was
measured. The values of SHG efficiency were obtained
from the ratio of the output to the input power.
The study of the NLO properties of KDP:LAP and
pure KDP crystals has revealed the rise of SHG
efficiency in the doped crystal by the factor close to 1.7
for the sectors {101} and 3.2 for the sectors {100} as
compared to that in pure KDP (Table 4).
From this study, it is clear that doping with LAP
leads to an enhancement in SHG efficiency, and the
doped KDP single crystals are more useful than the pure
ones for laser related device applications. The increase of
SHG efficiency in the {100} sector relatively to that for
the {101} sector in KDP:LAP crystal is probable due to
both the entry of the molecules and formation of
additional hydrogen bonds between the molecules and
the growing face of the crystal.
Fig. 3. Microhardness as a function of loading for the sectors {101} (a) and {100} (b) of the plane (001): pure KDP (1),
KDP:LAP (1.0 wt.% LAP) (2), KDP:LAP (2.2 wt.% LAP) (3) crystals.
Fig. 4. TGA (a) and DTA (b) curves of KDP crystal growth, sector {101}: nominally pure KDP crystal (dashed line 1),
KDP:LAP (2.2 wt.% LAP) crystal (green line 2) and KDP: LAP (4.4 wt.% LAP) crystal (blue line 3).
T
G
A
,
%
SPQEO, 2019. V. 22, N 1. P. 60-66.
Kostenyukova E.I., Pritula I.M., Bezkrovnaya O.N. et al. Effect of L-arginine phosphate doping on structural …
64
Table 3. LIDT in KDP and KDP:LAP crystals for various LAP
concentrations.
LIDT, J/сm2 Concentration LAP
in the mother liquor,
wt.%
Sector {101},
face (001)
Sector {100},
face (001)
0 46.8 46.8
0.2 40.3 40.3
1.0 38.7 37.7
2.2 31.6 24.6
7. Thermal properties
Differential thermal (DTА) and thermogravimetric
(TGA) analyses of all crystals were investigated using
the МОМ Q-1500D derivatograph (Hungary) in
20…550 °С temperature range with the rate of heating
2.5 deg/min. Aluminum alpha-oxide was used as a
standard; the samples of crystals (~1 g) for these
measurements were crushed in a corundum mortar.
The TGA and DTA curves of the samples of pure
KDP and KDP: LAP crystals (growth sector {101}) are
shown in Figs 4a, 4b. Continuous weight loss of the
studied samples is observed up to the temperature 450 °C
and is approximately 12-14%. The thermogravimetric
curve has three sections corresponding to the temperature
ranges of 20…200 (220) °C, 200 (220)…320 (360) °C
and 320 (360)…450 °C. For the first and third sections,
the mass loss is insignificant and is caused by the
removal of adsorbed water (the first section) and removal
of residual dehydration products (the third section). The
most intense mass loss is observed in the second section,
where it is 12 (13)%. Within the region 200…380 °C,
KDP crystals are dehydrated. The DTA curve contains
several exothermic peaks within the temperature range
210…380 °C that corresponds to the dehydration of KDP
crystals [16, 17]. It should be noted that for the growth
sector {100}, the effect of the dopant on the course of the
TG curves was similar.
For the TGA curves inherent to the doped crystals
(2.2 wt.% LAP) in the growth sector {101}, the shift to
the low-temperature region of the section of intense mass
loss is observed: for nominally pure KDP crystals, this
section is within the temperature range 215…350 °C,
grown in the presence of LAP with the concentration
2.2 wt.% – 200…320 °С (Fig. 4b). The decrease in the
thermal stability of KDP crystals is due to the possible
loosening their structure upon doping. With the further
increase in the concentration of LAP up to 4.4 wt.% of
the beginning of the site of intense mass loss coincides
with that for nominally pure KDP, and the end of
intensive mass loss shifts by 10 °C towards the higher
temperatures.
At the same time, the peaks in the DTA curves
almost coincide. An increase in the thermal stability of
the crystals in the {101} growth sector at the LAP
concentration 4.4 wt.% relatively to the crystal grown at
the LAP concentration of 2.2 wt.% may be caused by a
more perfect lattice structure due to slow crystal growth
related to blocking its faces by additive molecules.
8. Conclusion
Large-size optically transparent KDP:LAP
(0.2…4.4 wt.% of LAP in the solution) have been grown
using the method of temperature reduction. The grown
crystals have been subjected to the NLO study to
measure the SHG efficiency in comparison with that of
pure KDP. The study of the NLO properties of KDP:LAP
and pure KDP crystals has revealed the rise of SHG
efficiency in the doped crystal by the factor close to 1.7
for the sectors {101} and 3.2 for the sectors {100} as
compared to those for the pure KDP. The choice of L-
arginine amino acid as a modifying dopant is related with
the fact that it contains the amino group with a strong
electron acceptor property, which may essentially
influence the electron density distribution in the molecule
and, consequently, the value of NLO response of the
hybrid system.
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Authors and CV
Kostenyukova E.I., Junior
researcher at the department of
nonlinear optical crystals, SSI
“Institute for Single Crystals”, NAS
of Ukraine. The area of scientific
interests includes crystal growth
from solutions, physical properties
of nonlinear-optical materials,
development and investigation of
composite materials for laser and
optoelectronic technique.
E-mail: e.kostenyukova@gmail.com
Pritula I.M., Corresponding
Member of NAS of Ukraine, Doctor
of Sciences in Physics and
Mathematics, Head of the SSI
“Institute for Single Crystals”, NAS
of Ukraine. The area of his scientific
interests includes crystal growth
from solutions, physical properties
of nonlinear-optical materials; defects in crystals,
development and investigation of composite materials
for laser and optoelectronic technique.
E-mail: pritula@isc.kharkov.ua
Bezkrovnaya O.N., Senior
researcher at the department of
nonlinear optical crystals, SSI
“Institute for Single Crystals”, NAS
of Ukraine. The area of her scientific
interests includes crystal growth
from solutions, physical properties
of nonlinear-optical materials, deve-
lopment and investigation of composite materials for
laser and optoelectronic technique.
E-mail: bezkrovnaya@isc.kharkov.ua
SPQEO, 2019. V. 22, N 1. P. 60-66.
Kostenyukova E.I., Pritula I.M., Bezkrovnaya O.N. et al. Effect of L-arginine phosphate doping on structural …
66
Kovalenko N.O., Senior researcher
at the department of nonlinear
optical crystals, SSI “Institute for
Single Crystals”, NAS of Ukraine.
The area of his scientific interests
includes crystal growth by Bridgman
method and characterization of chal-
cogenide compounds and their solid
solutions for IR laser optics and
semiconductor radiation detectors.
E-mail: nazar@isc.kharkov.ua
Dorochenko A.G., Senior
researcher at the department of
crystalline materials of complex
compounds, SSI “Institute for Single
Crystals”, NAS of Ukraine. The area
of his scientific interests includes
material characterization, nano-
materials, mechanical properties,
microstructure.
E-mail: dorochenko@isc.kharkov.ua
Khimchenko S.V., Researcher at
the department of analytical
chemistry, SSI “Institute for Single
Crystals”, NAS of Ukraine. The area
of his scientific interests includes
sample preparation, preconcen-
tration, digital colorimetry, test
tools, XRF analysis and
chemometrics for study of chemical
composition of functional materials, single crystals and
environmental objects.
E-mail: khimchenko@isc.kh.ua
Fedorov A.G., Senior researcher at
the department of X-ray diffraction
studies and quantum chemistry, SSI
“Institute for Single Crystals“, NAS
of Ukraine. The area of his scientific
interests includes X-ray diffraction
analysis.
E-mail: fedorov@xray.isc.kharkov.com
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| id | nasplib_isofts_kiev_ua-123456789-215426 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1560-8034 |
| language | English |
| last_indexed | 2026-03-23T18:51:20Z |
| publishDate | 2019 |
| publisher | Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| record_format | dspace |
| spelling | Kostenyukova, E. Pritula, I. Bezkrovnaya, O. Kovalenko, N. Doroshenko, A. Khimchenko, S. Fedorov, A. 2026-03-16T10:59:48Z 2019 Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal / E. Kostenyukova, I. Pritula, O. Bezkrovnaya, N. Kovalenko, A. Doroshenko, S. Khimchenko, A. Fedorov // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2019. — Т. 22, № 1. — С. 60-66. — Бібліогр.: 17 назв. — англ. 1560-8034 PACS: 42.70.-a, 61.72.Ss, 61.80.Ed, 77.84.Fa https://nasplib.isofts.kiev.ua/handle/123456789/215426 https://doi.org/10.15407/spqeo22.01.60 L-arginine-phosphate doped Potassium Dihydrogen Phosphate single crystals with 0.2…4.4 wt.% concentration in the solution were grown on a point seed by the method of temperature reduction. The grown KDP: LAP crystals were characterized by UV-vis spectroscopy, powder XRD analysis, differential thermal and thermogravimetric analyses, and second harmonic generation efficiency measurements. The mechanical and laser strength values of LAP-doped KDP crystals have been evaluated. Slight variation in the unit cell parameters of KDP:LAP has been reported. It has been shown that the efficiency of second harmonic generation conversion in KDP:LAP crystals was higher by more than 3-fold as compared to the corresponding values of pure KDP. The experimental results evidence the suitability of the grown KDP:LAP crystals for optoelectronics, and the study is helpful for further searching and designing of hybrid NLO materials. en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics Optics Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal Article published earlier |
| spellingShingle | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal Kostenyukova, E. Pritula, I. Bezkrovnaya, O. Kovalenko, N. Doroshenko, A. Khimchenko, S. Fedorov, A. Optics |
| title | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal |
| title_full | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal |
| title_fullStr | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal |
| title_full_unstemmed | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal |
| title_short | Effect of L-arginine phosphate doping on structural, optical and strength properties of KDP single crystal |
| title_sort | effect of l-arginine phosphate doping on structural, optical and strength properties of kdp single crystal |
| topic | Optics |
| topic_facet | Optics |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/215426 |
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