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Ultrashort Photonic Crystal Optical Switch Actuated by a Microheater

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5 Author(s)
Beggs, D.M. ; Sch. of Phys. & Astron., Univ. of St. Andrews, St. Andrews ; White, T.P. ; Cairns, L. ; O'Faolain, L.
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We demonstrate a silicon photonic crystal (PhC) optical switch with a 20-mus response time controlled by a thermo-optic microheater. The switch consists of a dispersion engineered PhC directional coupler that is only 4.9 mum long. Optical and electrical isolation is provided by backfilling the holes and embedding the PhC in a silica cladding to produce a vertically symmetric structure that is more robust than a membrane geometry. No increase in optical loss is observed due to the silica cladding, despite operating above the lightline; the insertion loss for airbridge and silica embedded structures are comparable at 1-2 dB.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 1 )

Date of Publication:

Jan.1, 2009

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