Local tuning of photonic crystal cavities using chalcogenide glasses

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.

3 pages, 2 figures

References in corpus (4)

• Coherent Population Trapping of Single Spins in Diamond Under Optical Excitation
• Generation and transfer of single photons on a photonic crystal chip
• Local Quantum Dot Tuning on Photonic Crystal Chips
• Frequency control of photonic crystal membrane resonators by mono-layer deposition

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