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A fully suspended mid-infrared racetrack resonator is experimentally demonstrated. It has good mechanical stability and broad spectral range of transparency. The measured loaded optical Q factor is 16,440 at 2402.38 nm, with an extinction ratio of 11.83 dB.
Wavelength-sized silicon disk cavities in superfluid helium exhibit blue-shifted bistability near the λ-point when subject to high optical input power. At lower temperature, we observe symmetric lineshapes and obtain a large intracavity photon number of 40,000.
Supermode Si/InGaAsP hybrid lasers with a varying-width Si waveguide have been fabricated and shown to be superior to those lasers with a uniform-width Si waveguide. Edge emission images demonstrate mode evolution.
We propose using supermode control to enhance the modal gain in integrated hybrid Si/III-V optoelectronic circuits. Numerical simulations predict that a 4-fold enhancement in modal gain can be achieved with optimal design.
Hybrid Si/InGaAsP Fabry-Perot evanescent lasers are fabricated via wafer bonding. Compared with previous similar devices, the current threshold density, turn-on voltage, output power and slope efficiency are all improved. Images show modal confinement to Silicon.
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