Long-Lived Coherent Acoustic Phonons in Epitaxially Grown III-V Adiabatic Cavities
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866913493335146496 |
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| author | Hanif, Muhammad Dubajic, Milos Sreerag, Sandeep. J. Kini, Rajeev N. Conibeer, Gavin J. Nielsen, Michael P. Bremner, Stephen P. |
| author_facet | Hanif, Muhammad Dubajic, Milos Sreerag, Sandeep. J. Kini, Rajeev N. Conibeer, Gavin J. Nielsen, Michael P. Bremner, Stephen P. |
| contents | We provide evidence of strongly confined coherent acoustic phonons inside high quality factor phononic cavities that exhibit tailoredphonon potentials. Using GaAs/AlAs quasiperiodic superlattices, these functional phonon potentials are realized by adiabatically changing the layer thicknesses along the growth direction. Room temperature ultrafast vibrational spectroscopy reveals discrete phonon levels in the range of $\approx 96-101$ GHz. Additionally, we confirm that phononic cavities significantly retard the energy loss rate of the photoexcited carriers as evidenced by time-resolved photoluminescence measurements. These results highlight the potential of opto-phononic devices that can bridge the divide between phononics and optoelectronics by concurrently engineering electronic and phononic properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_02558 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Long-Lived Coherent Acoustic Phonons in Epitaxially Grown III-V Adiabatic Cavities Hanif, Muhammad Dubajic, Milos Sreerag, Sandeep. J. Kini, Rajeev N. Conibeer, Gavin J. Nielsen, Michael P. Bremner, Stephen P. Applied Physics Mesoscale and Nanoscale Physics We provide evidence of strongly confined coherent acoustic phonons inside high quality factor phononic cavities that exhibit tailoredphonon potentials. Using GaAs/AlAs quasiperiodic superlattices, these functional phonon potentials are realized by adiabatically changing the layer thicknesses along the growth direction. Room temperature ultrafast vibrational spectroscopy reveals discrete phonon levels in the range of $\approx 96-101$ GHz. Additionally, we confirm that phononic cavities significantly retard the energy loss rate of the photoexcited carriers as evidenced by time-resolved photoluminescence measurements. These results highlight the potential of opto-phononic devices that can bridge the divide between phononics and optoelectronics by concurrently engineering electronic and phononic properties. |
| title | Long-Lived Coherent Acoustic Phonons in Epitaxially Grown III-V Adiabatic Cavities |
| topic | Applied Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2303.02558 |