Journal article
Self-mixing interferometry in vertical-cavity surface-emitting lasers for nanomechanical cantilever sensing
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark1
Department of Photonics Engineering, Technical University of Denmark2
Nanoprobes Group, NanoSystemsEngineering Section, Department of Micro- and Nanotechnology, Technical University of Denmark3
NanoSystemsEngineering Section, Department of Micro- and Nanotechnology, Technical University of Denmark4
Department of Micro- and Nanotechnology, Technical University of Denmark5
Quantum and Laser Photonics, Department of Photonics Engineering, Technical University of Denmark6
We have experimentally investigated self-mixing interference produced by the feedback of light from a polymer micrometer-sized cantilever into a vertical-cavity surface-emitting laser for sensing applications. In particular we have investigated how the visibility of the optical output power and the junction voltage depends on the laser injection current and the distance to the cantilever.
The highest power visibility obtained from cantilevers without reflective coatings was 60%, resulting in a very high sensitivity of 45 mV/nm with a noise floor below 1.2 mV. Different detection schemes are discussed.
| Language: | English |
|---|---|
| Publisher: | American Institute of Physics |
| Year: | 2009 |
| Pages: | 091103 |
| ISSN: | 10773118 and 00036951 |
| Types: | Journal article |
| DOI: | 10.1063/1.3086893 |
| ORCIDs: | Hvam, Jørn Märcher , Boisen, Anja and Yvind, Kresten |
