title: GaN-based LEDs surrounded with a two-dimensional nanohole photonic crystal structure for effective laterally guided mode coupling.
abstract: Traditional implementation of photonic crystals (PhCs) on LED light emission surfaces results in weak coupling of light with the PhCs. Here we introduce a GaN-based LED surrounded with a nanohole PhC structure along the mesa edges. The laterally guided modes in the epi-structure can be effectively coupled with the two-dimensional periodic structure. The proposed structure results in the improvement of LED light extraction and provides flexibility of radiation directionality control.
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, 1, Sec. 4, Roosevelt Road, Taipei City, 10617, Taiwan.
authors.forename: Yun-Wei
authors.initials: YW
authors.lastname: Cheng
authors.forename: Szu-Chieh
authors.initials: SC
authors.lastname: Wang
authors.forename: Yu-Feng
authors.initials: YF
authors.lastname: Yin
authors.forename: Liang-Yu
authors.initials: LY
authors.lastname: Su
authors.forename: JianJang
authors.initials: J
authors.lastname: Huang