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Fabry-Perot Interferometric Calibration of 2D Nanomechanical Plate Resonators

Research output: Contribution to Journal/MagazineJournal article

  • Myrron Albert Callera Aguila
  • Joshoua Condicion Esmenda
  • Jyh-Yang Wang
  • Teik-Hui Lee
  • Chi-Yuan Yang
  • Kung-Hsuan Lin
  • Kuei-Shu Chang-Liao
  • Sergey Kafanov
  • Yuri A. Pashkin
  • Chii-Dong Chen
<mark>Journal publication date</mark>9/02/2021
Publication StatusPublished
<mark>Original language</mark>English


Displacement calibration of nanomechanical plate resonators presents a challenging task. Large nanomechanical resonator thickness reduces the amplitude of the resonator motion due to its increased spring constant and mass, and its unique reflectance. Here, we show that the plate thickness, resonator gap height, and motional amplitude of circular and elliptical drum resonators, can be determined in-situ by exploiting the fundamental interference phenomenon in Fabry-Perot cavities. The proposed calibration scheme uses optical contrasts to uncover thickness and spacer height profiles, and reuse the results to convert the photodetector signal to the displacement of drumheads that are electromotively driven in their linear regime. Calibrated frequency response and spatial mode maps enable extraction of the modal radius, effective mass, effective driving force, and Young's elastic modulus of the drumhead material. This scheme is applicable to any configuration of Fabry-Perot cavities, including plate and membrane resonators.

Bibliographic note

15 pages, 4 figures