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Science. 1999 Jun 11;284(5421):1819-21.

Two-dimensional photonic band-Gap defect mode laser

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Departments of Electrical Engineering and Applied Physics, California Institute of Technology, Pasadena, CA 91125, USA. Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA.


A laser cavity formed from a single defect in a two-dimensional photonic crystal is demonstrated. The optical microcavity consists of a half wavelength-thick waveguide for vertical confinement and a two-dimensional photonic crystal mirror for lateral localization. A defect in the photonic crystal is introduced to trap photons inside a volume of 2.5 cubic half-wavelengths, approximately 0.03 cubic micrometers. The laser is fabricated in the indium gallium arsenic phosphide material system, and optical gain is provided by strained quantum wells designed for a peak emission wavelength of 1.55 micrometers at room temperature. Pulsed lasing action has been observed at a wavelength of 1.5 micrometers from optically pumped devices with a substrate temperature of 143 kelvin.

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