Reversible tuning from multi-mode laser to single-mode laser in coupled nanoribbon cavity
| Autor: | Jian Zhang, Hailong Wang, Liaoxin Sun, Shuai Yang, Xinle Lu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Applied Physics Letters. 118:171101 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/5.0046518 |
| Popis: | Semiconductor nanostructures such as nanowires and nanoribbons have shown great potential for fabrication of functional nanoscale lasers due to their high dielectric contrast and bandgap engineering performance. However, these as-grown nanostructures are weak in structural controllability, and the operation of highly desired single-mode lasers currently performed by coupled nanostructural cavities needs a relatively complex fabrication process and lacks flexibility. In this work, a tunable coupled nanoribbon cavity was simply obtained by using a home-made transfer platform. Relying on this, the Vernier effect-driven high performed single-mode laser was realized. Most interestingly, the laser mode can be reversibly tuned between single-mode and multi-mode by adjusting the gap of two coupled nanoribbons. The coupling constant and the optical loss of different gaps were demonstrated by simulation, large diffraction loss, and scattering loss as limiting factors for coupling were clarified. This work offers an alternative route toward realizing mode-tunable nanoscale lasers, which may have great potential in flexible multi-functional optoelectronic devices. |
| Databáze: | OpenAIRE |
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