Spatial modal control of two-dimensional photonic crystal Bragg lasers |
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Authors: | Zhu Lin Sun Xiankai Derose Guy A Scherer Axel Yariv Amnon |
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Institution: | Department of Electrical Engineering and Department of Applied Physics, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA. linz@caltech.edu |
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Abstract: | We investigate the modal losses and field distributions of different order transverse modes supported by the photonic crystal Bragg structure using a transfer matrix method. We find that only the fundamental transverse mode has a single-lobed near field and far field and there exists a trade-off between ensuring lasing in the fundamental transverse mode and reducing the threshold. Employing these design principles, we experimentally demonstrate a large-area, edge-emitting, and single-mode semiconductor photonic crystal Bragg laser with a single-lobed, diffraction-limited far field under continuous wave condition. |
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