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Photonic crystal nanocavities fabricated from chalcogenide glass fully embedded in an index-matched cladding with a high Q-factor (>750,000)

Gai, Xin; Luther-Davies, Barry; White, Thomas


We have designed and fabricated a 2-D photonic crystal hetero-structure cavity in the chalcogenide glass Ge11.5As24Se64.5 that is fully embedded in a cladding with refractive index of 1.44. The low index contrast of this structure (≈1.21) means that high-Q resonances cannot be obtained using standard hetero-structure cavity designs based on W1 waveguides. We show that reducing the waveguide width can substantially improve light confinement, leading to high-Q resonances in a hetero-structure...[Show more]

CollectionsANU Research Publications
Date published: 2012-06-25
Type: Journal article
Source: Optics Express 20.14 (2012): 15503-15515
DOI: 10.1364/OE.20.015503


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