title: Electrically Pumped III-N Microcavity Light Emitters Incorporating an Oxide Confinement Aperture.
abstract: In this work, we report on electrically pumped III-N microcavity (MC) light emitters incorporating oxide confinement apertures. The utilized SiO2aperture can provide a planar ITO design with a higher index contrast (~1) over other previously reported approaches. The fabricated MC light emitter with a 15-μm-aperture shows a turn-on voltage of 3.3 V, which is comparable to conventional light emitting diodes (LEDs), showing a good electrical property of the proposed structure. A uniform light output profile within the emission aperture suggesting the good capability of current spreading and current confinement of ITO and SiO2aperture, respectively. Although the quality factor (Q) of fabricated MC is not high enough to achieve lasing action (~500), a superlinear emission can still be reached under a high current injection density (2.83 kA/cm2) at 77 K through the exciton-exciton scattering, indicating the high potential of this structure for realizing excitonic vertical-cavity surface-emitting laser (VCSEL) action or even polariton laser after fabrication optimization.
authors.affiliation: Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan.
authors.forename: Ying-Yu
authors.initials: YY
authors.lastname: Lai
authors.affiliation: Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan.
authors.forename: Tsu-Chi
authors.initials: TC
authors.lastname: Chang
authors.affiliation: Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan.
authors.forename: Ya-Chen
authors.initials: YC
authors.lastname: Li
authors.affiliation: Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan. timtclu@mail.nctu.edu.tw.
authors.forename: Tien-Chang
authors.identifier: http://orcid.org/0000-0003-4192-9919
authors.initials: TC
authors.lastname: Lu
authors.affiliation: Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan.
authors.forename: Shing-Chung
authors.initials: SC
authors.lastname: Wang
keywords: Electrically pumped; Light emitting diodes (LEDs); Microcavity; Oxide aperture