PHYSICS / TEACHING / AI
Selected research and publications on non-Hermitian photonics, parity–time symmetry and photonic zero modes.
How does amplification or absorption reshape a lattice mode?
It offers another design parameter for controlling localization.
In the studied lattices, non-Hermitian particle-hole symmetry creates a flat real spectrum. Stronger gain/loss increasingly localizes an edge-defect mode. Zero is measured relative to a reference frequency.
Bingkun Qi is the first author.
Can a mode retain its reference frequency without global symmetry?
This suggests another route to frequency-stable photonic devices.
Coupling a boundary zero mode to the bulk under specific non-Hermitian conditions yields a zero mode robust to bulk disorder. The boundary and coupling conditions must remain satisfied.
Bingkun Qi is a co-author, listed third.
Investigates robust zero modes in non-Hermitian systems that lack global symmetries.
Studies the linear localization of zero modes in weakly coupled non-Hermitian reservoirs.
Explores the physics and devices of parity-time symmetry synthetic lasers.
Studies defect states emerging from a non-Hermitian flat band formed by photonic zero modes.