Aarhus University Seal / Aarhus Universitets segl

Optical sensors with functionalized nanodrums

PhD defence, Wednesday 11 December 2019. Sepideh Naserbakht.

2019.12.11 | Sunitha Satkunam

Sepideh Naserbakht

During her studies, Sepideh has worked with high-quality mechanical resonators in the form of suspended dielectric thin (100 nm) films. Because of their outstanding optomechanical properties and small mass, these nanodrums are extremely sensitive to perturbations due to small external perturbations, e.g. changes in radiation or gas pressure.

During her PhD, Sepideh improved the methods for assembling these resonators into sandwiches of closely-lying, parallel drums, and for characterizing them. She investigated the effects of air pressure on their mechanical properties and realized so-called “squeeze film” pressure sensors, with state-of-the-art responsivity/sensitivity in the rarefied air regime. She subsequently demonstrated how to tune the mechanical resonance frequencies as well as the nonlinear response of such nanodrum sandwiches by piezoelectrically controlling their tensile stress.

Sepideh’s PhD work with electro-optomechanical arrays opens up many interesting possibilities for optical sensing and nanomechanics investigations. 

The PhD degree was completed at the Department of Physics and Astronomy, Science and Technology, Aarhus University.

This résumé was prepared by the PhD student. 

Time: Wednesday 11 December 2019 at 13.00
Place: Building 1525, Room 626, Department of Physics and Astronomy, Ny Munkegade 120, Aarhus University, 800 Aarhus C.
Title of dissertation: Pressure sensing and electro-optomechanics with suspended membrane arrays
Contact information: Sepideh Naserbakht, e-mail: Sepideh@phys.au.dk, tel.: +45 52605409 
Members of the assessment committee:
Professor Ulrik Lund Andersen, Department of Physics, Technical University of Denmark (DTU)
Associate professor Tristan Briant, Laboratory Kastler Brossel (LKB), France
Associate professor Karsten Riisager (chair), Department of Physics and Astronomy, Aarhus University
Main supervisor:
Associate professor Aurelien Dantan, Department of Physics and Astronomy, Aarhus University
Language: The PhD dissertation will be defended in English 

The defence is public.

The dissertation is available for reading at the Graduate School of Science and Technology/GSST, Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C

PhD defence
12183 / i43