Ultralow Threshold, Single-Mode InGaAs/GaAs Multiquantum Disk Nanowire Lasers
| Autor: | Lan Fu, Pingping Chen, Fanlu Zhang, Xiaoming Yuan, Jianlin Zhao, Nikita Gagrani, Xuetao Gan, Xiaomei Yao, Naiyin Wang, Chennupati Jagadish, Xutao Zhang, Hark Hoe Tan, Wei Lu, Ruixuan Yi, Ziyuan Li |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Near-infrared spectroscopy General Engineering Nanowire Single-mode optical fiber General Physics and Astronomy FOS: Physical sciences Physics - Applied Physics Applied Physics (physics.app-ph) Laser law.invention law Optoelectronics General Materials Science Photonics business Spectroscopy Lasing threshold Physics - Optics Electronic circuit Optics (physics.optics) |
| Zdroj: | ACS nano. 15(5) |
| ISSN: | 1936-086X |
| Popis: | We present single-mode nanowire (NW) lasers with ultralow threshold in the near-infrared spectral range. To ensure the single-mode operation, the NW diameter and length are reduced specifically to minimize the longitudinal and transverse modes of the NW cavity. Increased optical losses and reduced gain volume by the dimension reduction are compensated by excellent NW morphology and InGaAs/GaAs multi-quantum disks. At 5 K, a threshold low as 1.6 {\mu}J/cm2 per pulse is achieved with a resulting quality factor exceeding 6400. By further passivating the NW with an AlGaAs shell to suppress surface non-radiative recombination, single-mode lasing operation is obtained with a threshold of only 48 {\mu}J/cm2 per pulse at room temperature with a high characteristic temperature of 223 K and power output of ~ 0.9 {\mu}W. These single-mode, ultralow threshold, high power output NW lasers are promising for the development of near-infrared nanoscale coherent light sources for integrated photonic circuits, sensing, and spectroscopy. |
| Databáze: | OpenAIRE |
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