Towards GHz-THz cavity optomechanics in DBR-based semiconductor resonators
Resonators based on acoustic distributed Bragg reflectors (DBRs) were optimized to work in the GHz–THz regime, and grown by molecular beam epitaxy. We show that in structures made of GaAlAs alloys a simultaneous optimal confinement of light in the visible range and phonons in the tens of GHz range c...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/32456 |
| Acceso en línea: | http://hdl.handle.net/11336/32456 |
| Access Level: | acceso abierto |
| Palabra clave: | Optomecánica Cavidades Semiconductores https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| Sumario: | Resonators based on acoustic distributed Bragg reflectors (DBRs) were optimized to work in the GHz–THz regime, and grown by molecular beam epitaxy. We show that in structures made of GaAlAs alloys a simultaneous optimal confinement of light in the visible range and phonons in the tens of GHz range can be achieved. We report time resolved differential optical reflectivity experiments performed with fs–ps laser pulses. The experimental results are in excellent agreement with simulations based on standard transfer matrix methods. The resonant behavior of the photoelastic coefficient is discussed. The perfect optic-acoustic mode overlapping, added to a strongly enhanced coupling mechanism, implies that these DBR-based cavities could be the base of highly efficient optomechanical resonators. |
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