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Título: | Proposal for a phonon laser utilizing quantum-dot spin states |
Autor: | Khaetskii, Alexander; Golovach, V. N. CSIC ORCID; Hu, Xuan; Žutić, I. | Fecha de publicación: | 2013 | Editor: | American Physical Society | Citación: | Physical Review Letters 111: 186601 (2013) | Resumen: | We propose a nanoscale realization of a phonon laser utilizing phonon-assisted spin flips in quantum dots to amplify sound. Owing to a long spin relaxation time, the device can be operated in a strong pumping regime, in which the population inversion is close to its maximal value allowed under Fermi statistics. In this regime, the threshold for stimulated emission is unaffected by spontaneous spin flips. Considering a nanowire with quantum dots defined along its length, we show that a further improvement arises from confining the phonons to one dimension, and thus reducing the number of phonon modes available for spontaneous emission. Our work calls for the development of nanowire-based, high-finesse phonon resonators. © 2013 American Physical Society. | URI: | http://hdl.handle.net/10261/102515 | DOI: | 10.1103/PhysRevLett.111.186601 | Identificadores: | doi: 10.1103/PhysRevLett.111.186601 issn: 0031-9007 e-issn: 1079-7114 |
Aparece en las colecciones: | (CFM) Artículos |
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Phonon Laser Utilizing.pdf | 240,4 kB | Adobe PDF | Visualizar/Abrir |
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