Influence of surface dimensional effects and interband transitions on absorption of light in aluminium

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2002
• Main Authors: Mеlnichenko, L.Yu., Tytarchuk, B.B., Shaykevich, I.A.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2002
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/121301
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Influence of surface dimensional effects and interband transitions on absorption of light in aluminium / L.Yu. Mеlnichenko, B.B. Tytarchuk, І.А. Shaykevich // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2002. — Т. 5, № 3. — С. 300-302. — Бібліогр.: 7 назв. — англ.

Optical conductivity of aluminium with of large roughness surface were measured by a spectroellipsometric method in visible, near infrared and near ultra-violet region of the spectrum. Aluminium foil was used as a sample. Comparison of the received results for rough and smooth surfaces of aluminium were performed. It is revealed that the absorption peak on the spectral curve of optical conductivity with a maximum near λ = 0.8 mm for a rough surface of aluminium is considerably wider than for smooth surface, although it has less intensity. An additional maxima near λ = 0.35 mm and λ= 0.97 mm take place for rough surface spectrum. The broadening and additional maxima are accounted for the basis of consideration of model of a surface layer of rough surface of aluminium, as heterogeneous thin layer, in which plasma resonance, resonance of optical conductivity, and also the interaction of these resonances with interband transitions occur.