Chip-scale integrated Raman light source based on a droplet microresonator
Abstract
We propose an innovative, tunable chip-scale Raman laser based on a liquid droplet whose shape can be modulated through the electrowetting effect. The laser and the optical pump required can be integrated onto a single chip, allowing for a compact and flexible source. While the Raman gain in crystalline media is restricted to a series of sharp and narrow lines, Raman gain in amorphous materials and liquids is broadband and spans a large range. This provides additional flexibility in tailoring the wavelength of a light source for the application of choice. The proposed technology will enable a chip-scale tunable laser, important for applications in sensing, spectroscopy, medicine and quantum technology. Current tunable lasers rely on cavities with bulk optics including elements such as tunable filters and mechanical scanning mirrors. In contrast, our chip-based solution does not contain mechanical parts with a limited lifetime, but instead relies on tuning the droplet size and shape. We propose to use the electrowetting effect, in which an applied voltage modulates the contact angle of a liquid droplet and thus, the overall shape of the resonator. For the proposed work, we will design and implement a chip-scale tunable Raman laser, based on a liquid microresonator, whose size can be controlled with voltage.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 30, 2022
- Source ID
- W911NF2210093
Entities
People
- Juliet T. Gopinath
Organizations
- Army Contracting Command
- United States Army
- University of Colorado Boulder