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High Quality Factors and Room-Temperature Lasing in a Modified Single-Defect Photonic Crystal Cavity

Research Area: Nanophotonics Year: 2004
Type of Publication: Article Keywords: photonic crystal cavity, quality factor, dry etching, semiconductor laser, tunable laser
Authors: Loncar, Marko; Hochberg, Michael; Scherer, Axel; Qiu, Y.
Journal: Optics Letters Volume: 29
Number: 7 Pages: 721-723
Month: April
We propose and analyze a new photonic crystal cavity design that supports a dipole mode with a quality factor greater than 20, 000. Such a high quality factor is obtained by precise tuning of the cavity length with minimal disruption of the surrounding photonic crystal. A fabrication procedure based on dry etching of InGaAsP material in HI/H 2/Ar is used to demonstrate photonic crystal lasers with smooth and straight sidewalls. These room-temperature lasers concentrate optical energy in air and are suitable for use as tunable lasers and chemical sensors.
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