We present classical and quantum light generation based on various types of group III-nitride micro- and nano-structures. We fabricated three-dimensional GaN-based pyramidal, annular, columnar, and tapered rod structures, on which InGaN/GaN quantum wells structures were grown by metal-organic chemical vapor deposition. We demonstrate phosphor-free white-color light emission with pyramidal and annular structures, unidirectional light propagation in energy-gradient, tapered core-shell rod structures, ultrafast single photon generation from a quantum dot formed at the apex of pyramid structures, and exciton-polariton formation at room-temperature in bulk GaN and GaN/InGaN core-shell rod structures.
Yong-Hoon Cho, "Classical and quantum light generation using nitride-based semiconductor micro- and nanostructures (Conference Presentation)," Proc. SPIE 10124, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI, 101240I (Presented at SPIE OPTO: January 31, 2017; Published: 20 April 2017); https://doi.org/10.1117/12.2249536.5398643880001.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon