https://doi.org/10.15407/spqeo5.03.300
Semiconductor Physics, Quantum
Electronics & Optoelectronics. 2002. V. 5, N 3. P. 300-302.
PACS: 78.20.-e
Influence of surface dimensional effects and interband transitions on absorption of light in aluminium
Department of Optics, Physics Faculty, Taras
Shevchenko Kyiv National University, 6 prosp. Glushkova, 03127 Kyiv, Ukraine
E-mail:shaykevi@phys.univ.kiev.ua
Abstract. 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 l
= 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
l = 0.35 mm and l
= 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.
Keywords: resonance
of optical conductivity, plasma resonance, large rough surface, absorption
peak
Paper received 12.06.02; accepted for publication
10.12.02.
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