Room-Temperature Observation of Trapped Exciton-Polariton Emission in GaN/AlGaN Microcavities with Air-Gap/III-Nitride Distributed Bragg Reflectors

详细信息    查看全文

• 作者：Renchun Tao ; Kenji Kamide ; Munetaka Arita ; Satoshi Kako ; Yasuhiko Arakawa
• 刊名：ACS Photonics
• 出版年：2016
• 出版时间：July 20, 2016
• 年：2016
• 卷：3
• 期：7
• 页码：1182-1187
• 全文大小：566K
• 年卷期：0
• ISSN：2330-4022

文摘

We demonstrate trapped exciton-polariton emission at room temperature from nonpolar GaN/AlGaN cavities sandwiched between air/AlGaN distributed Bragg reflectors. Nanoscale thickness fluctuations characteristic to the nonpolar AlGaN cavity layer create deep potential traps, giving rise to a strong (in-plane) localization of exciton-polaritons. The observed quantized exciton-polariton states exhibit a large quantized energy of up to 6 meV, which benefits from the wide bandgap of III-nitrides. The experimental results are well explained by numerical simulations. III-Nitride exciton-polaritons in such deep traps will be useful for practical exciton-polariton lasers with high degrees of coherence and high-repetition rate Josephson oscillators with multicomponent condensates.