Quantitative cavity-enhanced photothermal dynamics in TMDC-integrated ultrahigh-Q microcavities
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866911646812733440 |
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| author | Kanzawa, Hidetoshi Sugano, Ryo Kumazaki, Hajime Takahashi, Yuta Watanabe, Shinichi Fujii, Shun |
| author_facet | Kanzawa, Hidetoshi Sugano, Ryo Kumazaki, Hajime Takahashi, Yuta Watanabe, Shinichi Fujii, Shun |
| contents | We investigate photothermal effects in monolayer transition metal dichalcogenides (TMDCs) integrated with an ultrahigh-Q silica microcavity. Launching a continuous-wave laser into a cavity resonance enables controlled intracavity heating, allowing direct observation of excitonic photoluminescence (PL) modulation. A distinct redshift of the PL peak energy is observed as the pump wavelength is tuned across resonance. This behavior is quantitatively reproduced by a temperature-dependent bandgap model that combines the Varshni relation with the thermo-optic response of the microcavity, from which the local temperature rise can be estimated. We further find that PL collected through a fiber waveguide exhibits spectral and temporal characteristics markedly different from free-space emission, indicating selective coupling of the microcavity to specific excitonic channels. These results provide a quantitative framework for understanding photothermal effects in TMDC-microcavity hybrid systems and offer a versatile approach for all-optical control and probing of thermal states in integrated nanophotonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_03316 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantitative cavity-enhanced photothermal dynamics in TMDC-integrated ultrahigh-Q microcavities Kanzawa, Hidetoshi Sugano, Ryo Kumazaki, Hajime Takahashi, Yuta Watanabe, Shinichi Fujii, Shun Optics We investigate photothermal effects in monolayer transition metal dichalcogenides (TMDCs) integrated with an ultrahigh-Q silica microcavity. Launching a continuous-wave laser into a cavity resonance enables controlled intracavity heating, allowing direct observation of excitonic photoluminescence (PL) modulation. A distinct redshift of the PL peak energy is observed as the pump wavelength is tuned across resonance. This behavior is quantitatively reproduced by a temperature-dependent bandgap model that combines the Varshni relation with the thermo-optic response of the microcavity, from which the local temperature rise can be estimated. We further find that PL collected through a fiber waveguide exhibits spectral and temporal characteristics markedly different from free-space emission, indicating selective coupling of the microcavity to specific excitonic channels. These results provide a quantitative framework for understanding photothermal effects in TMDC-microcavity hybrid systems and offer a versatile approach for all-optical control and probing of thermal states in integrated nanophotonic devices. |
| title | Quantitative cavity-enhanced photothermal dynamics in TMDC-integrated ultrahigh-Q microcavities |
| topic | Optics |
| url | https://arxiv.org/abs/2605.03316 |