Title :
Bistable switching in chalcogenide 1D photonic crystal nanocavities
Author :
White, T.P. ; Gai, X. ; Madden, S. ; Choi, D.-Y. ; Debbarma, S. ; Luther-Davies, B.
Author_Institution :
Res. Sch. of Phys. & Eng., Australian Nat. Univ., Canberra, ACT, Australia
Abstract :
This paper reports on the first demonstration of high-Q 1D photonic crystal nanocavities in the chalcogenide glass Ge11.5As24Se64.5. This material has a high nonlinear figure of merit due to its low two-photon absorption and large Kerr nonlinear coefficient, making it ideal for ultrafast switching applications. The cavity consists of a 1D array of holes in a 580 nm wide waveguide on a silica substrate. The cavity is formed by tapering the size and spacing of the holes in the centre of the PhC to support a mode with calculated intrinsic Q-factor >;106, and volume ~0.7(λ/n)3. To achieve high transmission through the cavity at resonance, the number of holes in the mirror was reduced such that the loaded Q-factor is much lower than the intrinsic one.
Keywords :
Q-factor; arsenic compounds; chalcogenide glasses; germanium compounds; mirrors; nanophotonics; optical Kerr effect; optical glass; optical switches; optical waveguides; photonic crystals; two-photon processes; 1D hole array; Ge11.5As24Se64.5; Kerr nonlinear coefficient; Q-factor; bistable switching; chalcogenide 1D photonic crystal nanocavities; chalcogenide glass; mirror; resonance; size 580 nm; transmission; two photon absorption; ultrafast switching applications; waveguide; Photonics;
Conference_Titel :
Lasers and Electro-Optics Europe (CLEO EUROPE/EQEC), 2011 Conference on and 12th European Quantum Electronics Conference
Conference_Location :
Munich
Print_ISBN :
978-1-4577-0533-5
Electronic_ISBN :
Pending
DOI :
10.1109/CLEOE.2011.5943213
