Photo-microdomains in ferroelectrics: formation and light scattering caused by them
We propose the theory of the micro-domains (MD) formation in ferroelectric photorefractive crystals appeared under steady illumination by laser beam perpendicular to the polar axis. The crystal has the donor level made of photoactive impurity atoms. The longitudinal photovoltaic current leads to su...
Збережено в:
| Опубліковано в: : | Semiconductor Physics Quantum Electronics & Optoelectronics |
|---|---|
| Дата: | 2003 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2003
|
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/118039 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Photo-microdomains in ferroelectrics: formation and light scattering caused by them / A.N. Morozovska, E.A. Eliseev, V.V. Obukhovsky, V.V. Lemeshko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2003. — Т. 6, № 3. — С. 324-332. — Бібліогр.: 17 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-118039 |
|---|---|
| record_format |
dspace |
| spelling |
Morozovska, A.N. Eliseev, E.A. Obukhovsky, V.V. Lemeshko, V.V. 2017-05-28T09:23:35Z 2017-05-28T09:23:35Z 2003 Photo-microdomains in ferroelectrics: formation and light scattering caused by them / A.N. Morozovska, E.A. Eliseev, V.V. Obukhovsky, V.V. Lemeshko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2003. — Т. 6, № 3. — С. 324-332. — Бібліогр.: 17 назв. — англ. 1560-8034 PACS: 42.65.Hw, 42.70.Nq, 77.80.-e https://nasplib.isofts.kiev.ua/handle/123456789/118039 We propose the theory of the micro-domains (MD) formation in ferroelectric photorefractive crystals appeared under steady illumination by laser beam perpendicular to the polar axis. The crystal has the donor level made of photoactive impurity atoms. The longitudinal photovoltaic current leads to surface charges accumulation at the light spot boundary. These charges are localized at the nano-clusters of different size and charge density randomly distributed in the thin transition layer between light and dark. Each such cluster can be treated as the seeding for one MD growth. Therefore the numerous MD appear around the illuminated area. The micro-domain shape and physical properties are studied in the phenomenological Ginsburg-Landau-Devonshire theory framework with respect to the screening effects of ferroelectric medium. We obtained, that when the cluster charge density is more that the critical one, MD become very long and thin ones and in principle can intergrow through the perfect sample. In such a case they could be easily registered experimentally. So, exactly due to the transverse modulation effects the MD length can be sharply increased from the dozens of microns and up to the crystal length. All theoretical results are in a good qualitative agreement with our experiments on photo- micro-domain formation in LiNbO₃ crystals and light scattering caused by them. en Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України Semiconductor Physics Quantum Electronics & Optoelectronics Photo-microdomains in ferroelectrics: formation and light scattering caused by them Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them |
| spellingShingle |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them Morozovska, A.N. Eliseev, E.A. Obukhovsky, V.V. Lemeshko, V.V. |
| title_short |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them |
| title_full |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them |
| title_fullStr |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them |
| title_full_unstemmed |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them |
| title_sort |
photo-microdomains in ferroelectrics: formation and light scattering caused by them |
| author |
Morozovska, A.N. Eliseev, E.A. Obukhovsky, V.V. Lemeshko, V.V. |
| author_facet |
Morozovska, A.N. Eliseev, E.A. Obukhovsky, V.V. Lemeshko, V.V. |
| publishDate |
2003 |
| language |
English |
| container_title |
Semiconductor Physics Quantum Electronics & Optoelectronics |
| publisher |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України |
| format |
Article |
| description |
We propose the theory of the micro-domains (MD) formation in ferroelectric photorefractive crystals appeared under steady illumination by laser beam perpendicular to the polar axis.
The crystal has the donor level made of photoactive impurity atoms. The longitudinal photovoltaic current leads to surface charges accumulation at the light spot boundary. These charges are localized at the nano-clusters of different size and charge density randomly distributed in the thin transition layer between light and dark. Each such cluster can be treated as the seeding for one MD growth. Therefore the numerous MD appear around the illuminated area. The micro-domain shape and physical properties are studied in the phenomenological Ginsburg-Landau-Devonshire theory framework with respect to the screening effects of ferroelectric medium.
We obtained, that when the cluster charge density is more that the critical one, MD become very long and thin ones and in principle can intergrow through the perfect sample. In such a case they could be easily registered experimentally. So, exactly due to the transverse modulation effects the MD length can be sharply increased from the dozens of microns and up to the crystal length.
All theoretical results are in a good qualitative agreement with our experiments on photo- micro-domain formation in LiNbO₃ crystals and light scattering caused by them.
|
| issn |
1560-8034 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/118039 |
| citation_txt |
Photo-microdomains in ferroelectrics: formation and light scattering caused by them / A.N. Morozovska, E.A. Eliseev, V.V. Obukhovsky, V.V. Lemeshko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2003. — Т. 6, № 3. — С. 324-332. — Бібліогр.: 17 назв. — англ. |
| work_keys_str_mv |
AT morozovskaan photomicrodomainsinferroelectricsformationandlightscatteringcausedbythem AT eliseevea photomicrodomainsinferroelectricsformationandlightscatteringcausedbythem AT obukhovskyvv photomicrodomainsinferroelectricsformationandlightscatteringcausedbythem AT lemeshkovv photomicrodomainsinferroelectricsformationandlightscatteringcausedbythem |
| first_indexed |
2025-12-07T18:12:07Z |
| last_indexed |
2025-12-07T18:12:07Z |
| _version_ |
1850874136767758336 |