Local tuning of photonic crystal cavities using chalcogenide glasses
Date
Authors
Faraon, Andrei
Englund, Dirk
Bulla, Douglas
Luther-Davies, Barry
Eggleton, Benjamin J.
Stoltz, Nick
Petroff, Pierre
Vuckovic, Jelena
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American Institute of Physics (AIP)
Abstract
We demonstrate a method to locally change the refractive index in planar
optical devices by photodarkening of a thin chalcogenide glass layer deposited
on top of the device. The method is used to tune the resonance of GaAs-based
photonic crystal cavities by up to 3 nm at 940 nm, with only 5% deterioration
in cavity quality factor. The method has broad applications for postproduction
tuning of photonic devices.
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Applied Physics Letters
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