Elliptical micropillars for efficient generation and detection of coherent acoustic phonons
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866915020831457280 |
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| author | Xiang, Chushuang Rodriguez, Anne de Oliveira, Edson Rafael Cardozo Gratiet, Luc Le Sagnes, Isabelle Morassi, Martina Lemaitre, Aristide Lanzillotti-Kimura, Norberto Daniel |
| author_facet | Xiang, Chushuang Rodriguez, Anne de Oliveira, Edson Rafael Cardozo Gratiet, Luc Le Sagnes, Isabelle Morassi, Martina Lemaitre, Aristide Lanzillotti-Kimura, Norberto Daniel |
| contents | Coherent acoustic phonon generation and detection assisted by optical resonances are at the core of efficient optophononic transduction processes. However, when dealing with a single optical resonance, the optimum generation and detection conditions take place at different laser wavelengths, i.e. different detunings from the cavity mode. In this work, we theoretically propose and experimentally demonstrate the use of elliptical micropillars to reach these conditions simultaneously at a single wavelength. Elliptical micropillar optophononic resonators present two optical modes with orthogonal polarizations at different wavelengths. By employing a cross-polarized scheme pump-probe experiment, we exploit the mode splitting and couple the pump beam to one mode while the probe is detuned from the other one. In this way, at a particular micropillar ellipticity, both phonon generation and detection processes are enhanced. We report an enhancement of a factor of ~3.1 when comparing the signals from elliptical and circular micropillars. Our findings constitute a step forward in tailoring the light-matter interaction for more efficient ultrahigh-frequency optophononic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_15271 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Elliptical micropillars for efficient generation and detection of coherent acoustic phonons Xiang, Chushuang Rodriguez, Anne de Oliveira, Edson Rafael Cardozo Gratiet, Luc Le Sagnes, Isabelle Morassi, Martina Lemaitre, Aristide Lanzillotti-Kimura, Norberto Daniel Optics Mesoscale and Nanoscale Physics Coherent acoustic phonon generation and detection assisted by optical resonances are at the core of efficient optophononic transduction processes. However, when dealing with a single optical resonance, the optimum generation and detection conditions take place at different laser wavelengths, i.e. different detunings from the cavity mode. In this work, we theoretically propose and experimentally demonstrate the use of elliptical micropillars to reach these conditions simultaneously at a single wavelength. Elliptical micropillar optophononic resonators present two optical modes with orthogonal polarizations at different wavelengths. By employing a cross-polarized scheme pump-probe experiment, we exploit the mode splitting and couple the pump beam to one mode while the probe is detuned from the other one. In this way, at a particular micropillar ellipticity, both phonon generation and detection processes are enhanced. We report an enhancement of a factor of ~3.1 when comparing the signals from elliptical and circular micropillars. Our findings constitute a step forward in tailoring the light-matter interaction for more efficient ultrahigh-frequency optophononic devices. |
| title | Elliptical micropillars for efficient generation and detection of coherent acoustic phonons |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2310.15271 |