Related Experiment Video
Updated: Jun 21, 2025
09:30
Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points
Published on: March 2, 2011
15.7K
Precise photoelectrochemical tuning of semiconductor microdisk lasers
Debarghya Sarkar1, Paul H Dannenberg1,2, Nicola Martino1
1Harvard Medical School and Wellman Center for Photomedicine, Massachusetts General Hospital, 65 Lansdowne St., Cambridge, Massachusetts 02139, United States.
Advanced Photonics
|July 12, 2024
Summary
We developed a photoelectrochemical (PEC) etching technique to precisely control the lasing wavelength of micro- and nano-disk lasers. This scalable method ensures deterministic wavelengths for nanophotonic and biomedical applications.
Area of Science:
- Nanophotonics and Optoelectronics
- Semiconductor Physics
Background:
- Micro- and nano-disk lasers are vital for on-chip and free-space applications.
- Standard nanofabrication leads to random disk diameters, hindering deterministic wavelength control.
Purpose of the Study:
- To develop a precise method for tuning the lasing wavelength of micro- and nano-disk lasers.
- To address the challenge of deterministic wavelength selection in disk laser fabrication.
Main Methods:
- A novel photoelectrochemical (PEC) etching technique was developed.
- The PEC mechanism and etching rates of compound semiconductors in sulfuric acid were investigated.
- The technique was applied to fabricate micro- and nano-disk lasers with tunable wavelengths.
Main Results:
- Precise tuning of lasing wavelengths with sub-nanometer accuracy was achieved.
- Micro- and nano-disk lasers with distinct, deterministic emission wavelengths were successfully produced.
- The scalability of the PEC etching technique was demonstrated.
Conclusions:
- The developed PEC etching technique offers precise control over micro- and nano-disk laser wavelengths.
- This scalable method enables the fabrication of laser groups with specific emission wavelengths.
- The technique is suitable for diverse nanophotonic and biomedical applications requiring tunable lasers.
