Spin-Lasers: Spintronics Beyond Magnetoresistance
| Autor: | Žutić, Igor, Xu, Gaofeng, Lindemann, Markus, Junior, Paulo E. Faria, Lee, Jeongsu, Labinac, Velimir, Stojšić, Kristian, Sipahi, Guilherme M., Hofmann, Martin R., Gerhardt, Nils C. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Solid State Commun. 316-317, 113949 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.ssc.2020.113949 |
| Popis: | Introducing spin-polarized carriers in semiconductor lasers reveals an alternative path to realize room-temperature spintronic applications, beyond the usual magnetoresistive effects. Through carrier recombination, the angular momentum of the spin-polarized carriers is transferred to photons, thus leading to the circularly polarized emitted light. The intuition for the operation of such spin-lasers can be obtained from simple bucket and harmonic oscillator models, elucidating their steady-state and dynamic response, respectively. These lasers extend the functionalities of spintronic devices and exceed the performance of conventional (spin-unpolarized) lasers, including an order of magnitude faster modulation frequency. Surprisingly, this ultrafast operation relies on a short carrier spin relaxation time and a large anisotropy of the refractive index, both viewed as detrimental in spintronics and conventional lasers. Spin-lasers provide a platform to test novel concepts in spin devices and offer progress connected to the advances in more traditional areas of spintronics. Comment: 22 pages and 21 figures, invited review for a special issue on spintronics in Solid State Commun |
| Databáze: | arXiv |
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