Electrically Pumped III-N Microcavity Light Emitters Incorporating an Oxide Confinement Aperture
| Autor: | Ying-Yu Lai, Shing-Chung Wang, Ya-Chen Li, Tsu-Chi Chang, Tien-Chang Lu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Fabrication Light emitting diodes (LEDs) Aperture Physics::Optics Electrically pumped 02 engineering and technology 01 natural sciences law.invention Vertical-cavity surface-emitting laser Optics Oxide aperture Materials Science(all) law 0103 physical sciences Polariton General Materials Science 010302 applied physics Nano Express business.industry Scattering 021001 nanoscience & nanotechnology Laser Condensed Matter Physics Optoelectronics 0210 nano-technology business Microcavity Lasing threshold Light-emitting diode |
| Zdroj: | Nanoscale Research Letters |
| ISSN: | 1931-7573 |
| Popis: | In this work, we report on electrically pumped III-N microcavity (MC) light emitters incorporating oxide confinement apertures. The utilized SiO2 aperture 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 SiO2 aperture, 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink