Violet-light spontaneous and stimulated emission from ultrathin In-rich InGaN/GaN multiple quantum wells grown by metalorganic chemical vapor deposition
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- Violet-light spontaneous and stimulated emission from ultrathin In-rich InGaN/GaN multiple quantum wells grown by metalorganic chemical vapor deposition
- Kwack, Ho-Sang; Kwon, Bong-Joon; Chung, Jin-Soo; Cho, Yong-Hoon; Kim, Hee Jin; Kwon, Soon-Yong; Yoon, Euijoon
- FUNDAMENTAL-BAND GAP; ENERGY
- Issue Date
- AMER INST PHYSICS
- APPLIED PHYSICS LETTERS, v.93, no.16, pp.1 - 3
- We investigated the spontaneous and stimulated emission properties of violet-light-emitting ultrathin In-rich InGaN/GaN multiple quantum wells (MQWs) with indium content of 60%-70%. The Stokes shift was smaller than that of In-poor InGaN MQWs, and the emission peak position at 3.196 eV was kept constant with increasing pumping power, indicating negligible quantum confined Stark effect in ultrathin In-rich InGaN MQWs despite of high indium content. Optically pumped stimulated emission performed at room temperature was observed at 3.21 eV, the high-energy side of spontaneous emission, when the pumping power density exceeds ∼31 kW/ cm2.
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