Single mode parity-time laser Conference Paper uri icon


  • 2015 SPIE. The concept of parity-time (PT) symmetry exploits the interplay between the material loss and gain to attain novel optical phenomena such as exceptional point and unidirectional light propagation. Here we experimentally demonstrate a PT symmetry breaking laser that allows unique control of the resonant modes. In contrast to conventional ring cavity lasers with multiple competing modes, our on-chip InGaAsP/InP based PT microring laser exhibits intrinsic single-mode lasing regardless of the gain spectral bandwidth. Thresholdless parity-time symmetry breaking due to the rotationally symmetric structure leads to stable single-mode operation at the specific whispering gallery mode order.

name of conference

  • Active Photonic Materials VII

published proceedings

  • Proceedings of SPIE

author list (cited authors)

  • Wong, Z. J., Feng, L., Ma, R., Wang, Y., & Zhang, X.

citation count

  • 0

complete list of authors

  • Wong, Zi Jing||Feng, Liang||Ma, Ren-Min||Wang, Yuan||Zhang, Xiang

editor list (cited editors)

  • Subramania, G. S., & Foteinopoulou, S.

publication date

  • August 2015