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Broad-stripe near-diffraction-limited mid-infrared laser with a second-order photonic-crystal distributed feedback grating

By: Meyer, J.R.; Kim, M.; Vurgaftman, I.; Canedy, C.L.; Bewley, W.W.; Kim, C.S.;

2004 / IEEE

Description

This item was taken from the IEEE Periodical ' Broad-stripe near-diffraction-limited mid-infrared laser with a second-order photonic-crystal distributed feedback grating ' Electron-beam lithography was used to pattern a second-order photonic-crystal distributed feedback grating onto an antimonide type-II ""W"" laser emitting at /spl lambda//spl ap/3.7 /spl mu/m. For pulsed optical pumping, the output beam was essentially diffraction-limited up to a stripe width of 150 /spl mu/m, and remained no worse than eight times the diffraction limit for stripes as wide as 600 /spl mu/m. This represents a considerable improvement over all previous mid-infrared semiconductor lasers with such broad stripes.