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Evanescent perturbation is examined as a means of tuning photonic microcavities over large wavelength ranges. 27 nm reversible tuning is achieved through nanometric control of a silica perturbing body in the near-field of a microring resonator.
Continuous-wave, visible emission from a silica microresonator on silicon by third harmonic generation is demonstrated. Emission is observed with pump powers <300 muW. This result opens the possibility of silicon microphotonic devices spanning from UV to NIR.
Fiber coupled silicon nitride microcavities with Q > 3.6 times 106 and effective mode volume < 10(lambda/n)3 at wavelengths resonant with alkali atom transitions are robustly integrated with magnetostatic atom-chips.
Using ion beam implantation of erbium a silica micro-disk laser on silicon chip is demonstrated. A clear transition of spontaneous emission to stimulated emission is observed, with threshold powers of less than 40 micro-Watts.
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