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6 October 2006 Toward efficient unidirectional photonic crystal light emitters
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Proceedings Volume 6352, Optoelectronic Materials and Devices; 635213 (2006)
Event: Asia-Pacific Optical Communications, 2006, Gwangju, South Korea
We propose efficient unidirectional light emitters, which are enabled by the use of large Purcell effect, defect engineering, and the bottom Bragg reflector. Enhanced spontaneous emission rate enables us to achieve very efficient light sources, in which most of the emitted photons can be funneled into a specific resonant mode of interest. The far-field radiation properties of a photonic crystal resonant mode are modified by tuning the cavity geometry and by placing a reflector below the cavity. As a result, > 80% of the photons generated inside a photonic crystal resonator can be collected from the top, within a small divergence angle of ±30°.
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Se-Heon Kim, Sun-Kyung Kim, and Yong-Hee Lee "Toward efficient unidirectional photonic crystal light emitters", Proc. SPIE 6352, Optoelectronic Materials and Devices, 635213 (6 October 2006);

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