Non-reciprocal transmission in photonic lattices based on unidirectional coherent perfect absorption.

The effect of material nonlinearity on the band gap for TE and TM modes in square and triangular lattices

In this article, by using the method of finite difference time domain (FDTD) and PML boundary conditions, we have studied the photonic band gaps for TE and TM modes in square and triangular lattices consisting of air holes in dielectric medium and compared the results. In addition, the effect of nonlinearity of the photonic crystal background on the photonic band gaps and comparison with the re...

Measurement and modeling of a complete optical absorption and scattering by coherent surface plasmon-polariton excitation using a silver thin-film grating.

We demonstrate the plasmonic analogue of a coherent photonic effect known as coherent perfect absorption. A periodically nanopatterned metal film perfectly absorbs multiple coherent light beams coupling to a single surface plasmon mode. The perfect absorbing state can be switched to a nearly perfect scattering state by tuning the phase difference between the incident beams. We theoretically exp...

Coherent Perfect Absorption in a Silicon Photonic Ring Resonator

We present the first experimental demonstration of coherent perfect absorption (CPA) in an integrated device. By leveraging the effects of CPA, phase-controlled modulation is achieved in a silicon photonic ring-resonator with an extinction of 8.12dB. OCIS codes: 130.0130, 030.1670, 060.1810, 130.3120

On-chip Non-reciprocal Optical Devices Based on Quantum Inspired Photonic Lattices

Light Transport in Random Media with PT -symmetry

The scattering properties of randomly layered optical media with PT -symmetric index of refraction are studied using the transfer-matrix method. We find that the transmission coefficient decays exponentially as a function of the system size, with an enhanced rate ξγ(W ) −1 = ξ0(W ) +ξγ(0) −1, where ξ0(W ) is the localization length of the equivalent passive random medium and ξγ(0) is the attenu...