86 citations · 465 across the 15 of their papers we have counts for
15 papers
Non-Hermitian gauged laser arrays with localized excitations: Anomalous threshold and generalized principle of selective pumping
Li Ge, Zihe Gao, Liang Feng
We investigate non-Hermitian skin modes in laser arrays with spatially localized excitation. Intriguingly, we observe an unusual threshold behavior when selectively pumping either…
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…
Non-Hermitian Multimode Interference
Stefano Longhi, Liang Feng
Multi-mode interference (MMI) and self-imaging are important phenomena of diffractive wave optics with major applications in optical signal processing, beam shaping and optical sen…
Non-Hermitian heterostructure for two-parameter sensing
Jieun Yim, Han Zhao, Bikashkali Midya +1
Non-Hermitian systems at the exceptional point (EP) degeneracy are demonstrated to be highly sensitive to environmental perturbation. Here, we propose and theoretically investigate…
Supersymmetric microring laser arrays
Bikashkali Midya, Han Zhao, Xingdu Qiao +5
Coherent combination of emission power from an array of coupled semiconductor lasers operating on the same chip is of fundamental and technological importance. In general, the nonl…
Continuous supersymmetric transformation for photonic design
Wiktor Walasik, Nitish Chandra, Bikashkali Midya +2
We propose to use a continuous supersymmetric (SUSY) transformation of a dielectric permittivity profile in order to design a photonic mode sorter. The iso-spectrality of the SUSY…
Experimental Realization of Multiple Topological Edge States in a One-Dimensional Photonic Lattice
Zhifeng Zhang, Mohammad Teimourpour, Jake Arkinstall +5
Topological photonic systems offer light transport that is robust against defects and disorder, promising a new generation of chip-scale photonic devices and facilitating energy-ef…
Topological multiband photonic superlattices
Bikashkali Midya, Liang Feng
A one-dimensional discrete lattice of dimers is known to possess topologically protected edge states when interdimer coupling is stronger than intradimer coupling. Here, we address…
Supercharge optical arrays
Bikashkali Midya, Wiktor Walasik, Natalia M. Litchinitser +1
We introduce the notion of a supercharge optical array synthesized according to supersymmetric charge operators. Starting from an arbitrary array, mathematical supersymmetry transf…
Supersymmetry-guided method for mode selection and optimization in coupled systems
Wiktor Walasik, Bikashkali Midya, Liang Feng +1
Single-mode operation of coupled systems such as optical-fiber bundles, lattices of photonic waveguides, or laser arrays requires an efficient method to suppress unwanted super-mod…
Exceptional Point Engineered Glass Slide for Microscopic Thermal Mapping
Han Zhao, Zhaowei Chen, Ruogang Zhao +1
Thermal sensing with fine spatial resolution is important to the study of many scientific areas. While modern microscopy systems allow easy optical detection at high spatial resolu…
Contrasting Spectral Signatures and Sensitivities of CPA-Lasing in a -Symmetric Periodic Structure
Li Ge, Liang Feng
The CPA-laser is a coexisting state of coherent perfect absorption and lasing that was proposed in parity-time () symmetric photonic systems. In this work we show that the…
Optical Reciprocity Induced Symmetry of the Scattering Eigenstates in Non--Symmetric Heterostructures
Li Ge, Liang Feng
The scattering matrix obeys the unitary relation in a Hermitian system and the symmetry property in a Parity-Time () sym…
Scattering in and Symmetric Multimode Waveguides: Generalized Conservation Laws and Spontaneous Symmetry Breaking beyond One Dimension
Li Ge, Konstantinos G. Makris, Demetrios N. Christodoulides +1
We extend the generalize conservation law of light propagating in a one-dimensional -symmetric system, i.e., for the transmittance and the reflec…
-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…