Home > Research > Publications & Outputs > Photothermal Responsivity of van der Waals Mate...


Text available via DOI:

View graph of relations

Photothermal Responsivity of van der Waals Material-Based Nanomechanical Resonators

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Myrron Albert Callera Aguila
  • 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 Pashkin
  • Chii-Dong Chen
Article number2675
<mark>Journal publication date</mark>4/08/2022
Issue number15
Number of pages16
Publication StatusPublished
<mark>Original language</mark>English


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 NbSe 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 NbSe drumheads scale with thickness, establishing a displacement-based framework for building bolometers using FP-mediated vdW NMRs.