2026-02-23 カリフォルニア大学サンタバーバラ校（UCSB）
＜関連情報＞
- https://news.ucsb.edu/2026/022395/hair-width-leds-could-replace-lasers-and-ucsb-doctoral-student-helping-make-it-happen
- https://opg.optica.org/oe/fulltext.cfm?uri=oe-34-2-2037
分布ブラッグ反射器によって側面に囲まれたInGaN/GaNマイクロLEDの発光効率と指向性の向上 Enhanced emission efficiency and directionality in InGaN/GaN microLEDs laterally enclosed by distributed Bragg reflectors
Roark Chao, Stephen Gee, Alejandro M. Quevedo, Wesley K. Mills, Tanay Tak, Hunter S. Larson, Kent N. Nitta, Shuji Nakamura, Jon A. Schuller, and Steven P. DenBaars
Optics Express Published: January 15, 2026
DOI:https://doi.org/10.1364/OE.583145
Abstract
Enhancing the efficiency and beam directivity of GaN micron-scale light-emitting diodes (µLEDs) is critical for visible-light communication, which has emerged as a promising platform for high-bandwidth optical links in data-center environments. We demonstrate a µLED design where the emitting mesa is laterally enclosed by a distributed Bragg reflector (DBR). This design achieves ∼20% higher optical output through air-side emission and ∼130% higher optical output through substrate-side emission with ∼30% reduced divergence compared to reference devices enclosed by a TiO2 film. Our results present a manufacturable route to efficient, directional µLEDs with applications in optical interconnects and advanced display technologies.
