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Surface plasmon mode coupling to the insulator/metal interface of sloped sidewalls of wet-etched Quantum Cascade lasers

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Abstract

We find the main challenge for narrowing wet-etched ridges of long-wavelength Quantum Cascade lasers is surface plasmon mode coupling at the insulator/metal interface of sloped sidewalls, resulting in extra waveguide loss and hence high threshold.

© 2012 Optical Society of America

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