Electrically Injected Parity Time–Symmetric Single Transverse–Mode Lasers
Abstract
Single transverse–mode operation of broad area–coupled waveguide lasers enabled by parity‐time (PT) symmetry is demonstrated. The PT‐symmetric laser operates on coupled waveguide cavities with electrically tuned gain and loss. Such a counterintuitive waveguide design enables PT‐symmetric breaking, causing unique mode selection and ultimately enables single‐mode operation. By electrically tuning the loss in the loss region of the coupled waveguide cavity, several different PT‐symmetric phases are analyzed theoretically, and the corresponding PT‐symmetric phase transition is demonstrated experimentally in the coupled waveguide laser.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 19, 2018
- Source ID
- 10.1002/lpor.201800154
Entities
People
- Chi‐sen Lee
- Ruizhe Yao
- Viktor Podolskiy
- Wei Guo
Organizations
- Army Research Office
- University of Massachusetts Lowell
- government of Massachusetts