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Photonic crystal cavities embedded in photonic crystal waveguides are investigated using a nanopositioning photoluminescence mapping technique. Coupled-cavity modes near telecom wavelengths are shown and their suitability for strong light matter interaction discussed.
We present a discretely tunable laser utilizing a digital micromirror device. Key performance parameters include 50 μs switching time, 3 pm wavelength repeatability and up to 40 mW optical power in the near infrared.
We report enhanced amplified-spontaneous-emission from CdSe/ZnS quantum-dots in an all-dielectric Si3N4/SiO2 microcavity. Directional emission is observed through the cavity mode. Enhancement is confirmed with time-resolved and steady-state photoluminescence measurements showing a Purcell factor of ∼1.3.
This paper presents the design and fabrication of narrowband resonant cavity absorbers in the long wave infrared. Absorption in multiple spectral bands is demonstrated with a structure whose thermal mass is compatible with thermal detectors.
A comb-drive actuated MEMS scanning mirror is used to actively Q-switch a side-pumped Nd:YAG laser. Minimum pulse durations of 38 ns are observed and maximum average output powers of 55 mW at 17.625 kHz pulse repetition frequency.
The design, fabrication, and quasi-static testing of a high fill factor electrostatically actuated MEMS mirror array with application to spectrometry are presented. Mirror inclination with applied voltage is demonstrated by optical profilometry.
A novel actuation scheme for MEMS deformable mirrors is presented in this paper. In this method electrostatic actuation is combined with pneumatic actuation to achieve either concave or convex surface curvature and to increase the optical focus range of the mirrors. The fabricated device consists of two membranes made of the photoset epoxy SU-8. One membrane serves as the deformable mirror and the...
The extraction efficiency of a laser with a photonic crystal at the top and a distributed Bragg reflector below can be as high as 90% if the reflector is a distance of one period away.
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