Parity-Time Symmetry Breaking in Coupled Nanobeam Cavities
arXiv:1511.08802
Abstract
The parity-time symmetry (PT symmetry) breaking phenomenon is investigated in a coupled nanobeam cavity system. An exceptional point is observed during the tuning of the relation of the gain/loss and coupling strength of the closely placed nanobeam pairs. The PT symmetry concept can be applied to realize unidirectional light propagation and single mode operation lasers, which may allow for a new way to harness the optical signal in photonic integrated circuits. Otherwise, operating at this particular exceptional point, sensitivity of tiny perturbation detection can be enhanced greatly compared with conventional sensors.
arXiv comment13 pages and 7 figures
References in corpus (13)
- Real Spectra in Non-Hermitian Hamiltonians Having PT Symmetry
- Nonreciprocal light transmission in parity-time-symmetric whispering-gallery microcavities
- PT-symmetry breaking and laser-absorber modes in optical scattering systems
- PT-symmetric laser-absorber
- Visualization of Branch Points in PT-Symmetric Waveguides
- Reversing the Pump-Dependence of a Laser at an Exceptional Point
- Pump-induced Exceptional Points in Lasers
- Observation of an exceptional point in a chaotic optical microcavity
- Nonlinearly-PT-symmetric systems: spontaneous symmetry breaking and transmission resonances
- Twofold Transition in PT-Symmetric Coupled Oscillators
- PT-Symmetric Sinusoidal Optical Lattices at the Symmetry-Breaking Threshold
- Analytic Results for a PT-symmetric Optical Structure
- Degrees and signatures of broken PT-symmetry in (non-uniform) lattices