We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Parity-time-symmetric circular Bragg lasers: a proposal and analysis.
- Authors
Gu, Jiahua; Xi, Xiang; Ma, Jingwen; Yu, Zejie; Sun, Xiankai
- Abstract
We propose a new type of semiconductor lasers by implementing the concept of parity-time symmetry in a two-dimensional circular Bragg grating structure, where both the real and imaginary parts of the refractive index are modulated along the radial direction. The laser modal properties are analyzed with a transfer-matrix method and are verified with numerical simulation of a practical design. Compared with conventional distributed-feedback lasers with modulation of only the real part of refractive index, the parity-time-symmetric circular Bragg lasers feature reduced threshold and enhanced modal discrimination, which in combination with the intrinsic circularly symmetric, large emission aperture are clear advantages in applications that require mode-hop-free, high-power, single-mode laser operation.
- Publication
Scientific Reports, 2016, p37688
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep37688