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Article

Photothermal Responsivity of van der Waals Material-Based Nanomechanical Resonators

1
Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
2
Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan
3
Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan
4
Department of Physics, Lancaster University, Lancaster LA1 4YB, UK
*
Authors to whom correspondence should be addressed.
Academic Editors: Jihoon Lee and Ming-Yu Li
Nanomaterials 2022, 12(15), 2675; https://doi.org/10.3390/nano12152675
Received: 7 July 2022 / Revised: 30 July 2022 / Accepted: 31 July 2022 / Published: 4 August 2022
(This article belongs to the Special Issue Nanotechnologies and Nanomaterials: Selected Papers from CCMR)
Nanomechanical resonators made from van der Waals materials (vdW NMRs) provide a new tool for sensing absorbed laser power. The photothermal response of vdW NMRs, quantified from the resonant frequency shifts induced by optical absorption, is enhanced when incorporated in a Fabry–Pérot (FP) interferometer. Along with the enhancement comes the dependence of the photothermal response on NMR displacement, which lacks investigation. Here, we address the knowledge gap by studying electromotively driven niobium diselenide drumheads fabricated on highly reflective substrates. We use a FP-mediated absorptive heating model to explain the measured variations of the photothermal response. The model predicts a higher magnitude and tuning range of photothermal responses on few-layer and monolayer NbSe2 drumheads, which outperform other clamped vdW drum-type NMRs at a laser wavelength of 532 nm. Further analysis of the model shows that both the magnitude and tuning range of NbSe2 drumheads scale with thickness, establishing a displacement-based framework for building bolometers using FP-mediated vdW NMRs. View Full-Text
Keywords: van der Waals materials; nanomechanical resonators; Fabry–Pérot interferometry; photothermal response; static displacement; absorptive heating; NbSe2 drumheads van der Waals materials; nanomechanical resonators; Fabry–Pérot interferometry; photothermal response; static displacement; absorptive heating; NbSe2 drumheads
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MDPI and ACS Style

Aguila, M.A.C.; Esmenda, J.C.; Wang, J.-Y.; Chen, Y.-C.; Lee, T.-H.; Yang, C.-Y.; Lin, K.-H.; Chang-Liao, K.-S.; Kafanov, S.; Pashkin, Y.A.; Chen, C.-D. Photothermal Responsivity of van der Waals Material-Based Nanomechanical Resonators. Nanomaterials 2022, 12, 2675. https://doi.org/10.3390/nano12152675

AMA Style

Aguila MAC, Esmenda JC, Wang J-Y, Chen Y-C, Lee T-H, Yang C-Y, Lin K-H, Chang-Liao K-S, Kafanov S, Pashkin YA, Chen C-D. Photothermal Responsivity of van der Waals Material-Based Nanomechanical Resonators. Nanomaterials. 2022; 12(15):2675. https://doi.org/10.3390/nano12152675

Chicago/Turabian Style

Aguila, Myrron Albert Callera, Joshoua Condicion Esmenda, Jyh-Yang Wang, Yen-Chun Chen, Teik-Hui Lee, Chi-Yuan Yang, Kung-Hsuan Lin, Kuei-Shu Chang-Liao, Sergey Kafanov, Yuri A. Pashkin, and Chii-Dong Chen. 2022. "Photothermal Responsivity of van der Waals Material-Based Nanomechanical Resonators" Nanomaterials 12, no. 15: 2675. https://doi.org/10.3390/nano12152675

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