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We demonstrated high-index-contrast, waveguide-coupled As2Se3 chalcogenide glass resonators monolithically integrated on silicon fabricated using optical lithography and a lift-off process. The resonators exhibited a high intrinsic quality factor of 2×10(5) at 5.2 μm wavelength, which is among the highest values reported in on-chip mid-infrared (mid-IR)… (More)
In this article, we review our recent work on mid-infrared (mid-IR) photonic materials and devices fabricated on silicon for on-chip sensing applications. Pedestal waveguides based on silicon are demonstrated as broadband mid-IR sensors. Our low-loss mid-IR directional couplers demonstrated in SiN x waveguides are useful in differential sensing… (More)
We have demonstrated what we believe to be the first waveguide photonic crystal cavity operating in the mid-infrared. The devices were fabricated from Ge23Sb7S70 chalcogenide glass (ChG) on CaF2 substrates by combing photolithographic patterning and focused ion beam milling. The waveguide-coupled cavities were characterized using a fiber end fire coupling… (More)
Solution-processing of chalcogenide glass materials has many benefits for the fabrication of photonic devices. We report on the structural properties of Ge 23 Sb 7 S 70 glass during solution-processing. The molecular and micro-structure of the bulk glass and the n-propylamine solution, as well as the spin-coated thin films and post-irradiated films are… (More)
We quantify the thermo-optic response of chalcogenide glasses to 2µm laser irradiation using Shack-Hartmann thermal lensing metrology. Induced dioptric powers as strong as 0.21m-1 are observed for CW pump irradiances as low as 38.2 W/cm 2 .
10.1 INTRODUCTION Chalcogenide glasses (ChGs) are well known for their high infrared (IR) transparency and amenability to fabrication in fiber and thin film forms, which makes them attractive candidates for mid-IR optical chemical and biological sensors. This chapter describes recent advances in the production of sensing devices from a variety of thin film… (More)