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Proceedings Paper

Tuning 2D photonic crystals
Author(s): Henry M. van Driel; Stephen W. Leonard; Hong-Wee Tan; A. Birner; J. Schilling; Stefan L. Schweizer; Ralf B. Wehrspohn; Ulrich Gosele
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Paper Abstract

We demonstrate three ways in which the optical band-gap of 2-D macroporous silicon photonic crystals can be tuned. In the first method the temperature dependence of the refractive index of an infiltrated nematic liquid crystal is used to tune the high frequency edge of the photonic band gap by up to 70 nm for H-polarized radiation as the temperature is increased from 35 to 59°C. In a second technique we have optically pumped the silicon backbone using 150 fs, 800 nm pulses, injecting high density electron hole pairs. Through the induced changes to the dielectric constant via the Drude contribution we have observed shifts upt to 30 nm of the high frequency edge of the E-polarized band-gap. Finally, we show that below-band-gap radiation at 2.0 and 1.7 μm can induce changes to the optical properties of silicon via the Kerr effect and tune the band edges of the 2-D macroporous silicon photonic crystal.

Paper Details

Date Published: 14 October 2004
PDF: 9 pages
Proc. SPIE 5511, Tuning the Optical Response of Photonic Bandgap Structures, (14 October 2004); doi: 10.1117/12.559914
Show Author Affiliations
Henry M. van Driel, Univ. of Toronto (Canada)
Stephen W. Leonard, Univ. of Toronto (Canada)
Hong-Wee Tan, Univ. of Toronto (Canada)
A. Birner, Max-Planck-Institut fur Mikrostrukturphysik (Germany)
J. Schilling, Max-Planck-Institut fur Mikrostrukturphysik (Germany)
Stefan L. Schweizer, Univ. Paderborn (Germany)
Ralf B. Wehrspohn, Univ. Paderborn (Germany)
Ulrich Gosele, Max-Planck-Institut fur Mikrostrukturphysik (Germany)

Published in SPIE Proceedings Vol. 5511:
Tuning the Optical Response of Photonic Bandgap Structures
Philippe M. Fauchet; Paul V. Braun, Editor(s)

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