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Simulated electric field distribution for a chalcogenide microsphere in (a, b) air and (c, d) polymer. λ = 1.55 μm light is coupled into the sphere from an adjacent silica taper. The field profiles in (b) and (d) are taken along y = 0.
Schematic of the microsphere packaging process: (a) coupling optimization between optical fiber taper and chalcogenide microsphere, (b) embedding both microsphere and optical fiber taper in an UV-curable low refractive index material, and (c) coupling optimization in the embedding material and UV curing of the polymer.
(a) Microscope image of a chalcogenide microsphere coupled with a silica fiber taper packaged in a cured polymer; (b) Packaged chalcogenide microsphere with a silica fiber taper on a glass slide.
Optical fiber taper output over the wavelength ranges of 1540-1560 nm (up) and 1548-1552 nm (bottom) before embedding (black), in uncured polymer (red) and cured polymer (blue).
Transmission spectra of the packaged chalcogenide microsphere in a wavelength range of 1549-1551 nm showing the periodic nature of the spectrum. Inset: Magnified view of the range from 1549.4 to 1549.5 nm. The resonance at 1549.46 nm has Q ∼ 1.8 × 105.
(a) Transmission spectra of the packaged chalcogenide microsphere during exposure to a 405 nm laser radiation; (b) Peak shift as a function of exposure time, black dots are measured data and the solid curve is an exponential fit.
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