86 citations · 112 across the 5 of their papers we have counts for
5 papers
Non-Hermitian gauged reciprocity and symmetry
Jiecheng Lyu, Zihe Gao, Liang Feng +1
The Lorentz reciprocity is a fundamental property in electromagnetism and well known to break down due to an external magnetic field. With a fictitious or imaginary vector potentia…
Complex Berry phase and imperfect non-Hermitian phase transitions
Stefano Longhi, Liang Feng
In many classical and quantum systems described by an effective non-Hermitian Hamiltonian, spectral phase transitions, from an entirely real energy spectrum to a complex spectrum,…
The missing link between standing- and traveling-wave resonators
Qi Zhong, Haoqi Zhao, Liang Feng +3
Optical resonators are structures that utilize wave interference and feedback to confine light in all three dimensions. Depending on the feedback mechanism, resonators can support…
-symmetric microring laser-absorber
Stefano Longhi, Liang Feng
The lasing and coherent perfect absorption (CPA) properties of -symmetric microrings with mixed index and gain gratings, externally coupled to a bus waveguide, are th…
Parity-Time Synthetic Laser
Liang Feng, Zi Jing Wong, Renmin Ma +2
Parity-time (PT) symmetry is a fundamental notion in quantum field theories. It has opened a new paradigm for non-Hermitian Hamiltonians ranging from quantum mechanics, electronics…