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Proceedings Paper

Enhancement of the photoconductivity in 2D photonic macroporous silicon structures
Author(s): Lyudmyla A. Karachevtseva; Mikola I. Karas'; Volodimir Onishchenko; Fiodor Fedorovych Sizov
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Paper Abstract

Effects of the enhancement of photoconductivity in 2D photonic macroporus silicon structures were investigated. Dependence of photoconductivity on the angle of incidence of the electromagnetic radiation is observed with maxima at normal incidence of electromagnetic radiation, in the region of the angle of full internal reflection respective to macropore walls and at a grazing angle of incidence respective to the surface of structure. The absolute maximum of photoconductivity is measured at distance between macropores, corresponding to two lengths of the electron free run, i.e. by the maximal transfer of the amplified electric components from a macropore surface in a silicon matrix. Angular dependences of photoconductivity, as well as enhancement of the photoconductivity in comparison with monocrystal silicon, primary absorption p-component of electromagnetic radiation testified to formation of surface electromagnetic waves in illuminated macroporous silicon structures. Its effects result in amplification of a local electric field on a surface of macroporous silicon structure and a macropore surface. The measured value of the built-in electric field on a macropore surface achieves 106 V/cm, the signal photoconductivity amplifies 102 times, and Raman scattering -- up to one order of value.

Paper Details

Date Published: 9 July 2004
PDF: 9 pages
Proc. SPIE 5360, Photonic Crystal Materials and Devices II, (9 July 2004); doi: 10.1117/12.530446
Show Author Affiliations
Lyudmyla A. Karachevtseva, V. Lashkarev Institute of Semiconductor Physics (Ukraine)
Mikola I. Karas', V. Lashkarev Institute of Semiconductor Phy (Ukraine)
Volodimir Onishchenko, V. Lashkarev Institute of Semiconductor Phy (Ukraine)
Fiodor Fedorovych Sizov, V. Lashkarev Institute of Semiconductor Phy (Ukraine)

Published in SPIE Proceedings Vol. 5360:
Photonic Crystal Materials and Devices II
Ali Adibi; Axel Scherer; Shawn-Yu Lin, Editor(s)

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