Coherent Perfect Absorption Laser Points in One-Dimensional Anti-Parity–Time-Symmetric Photonic Crystals

Wang, Huiling; Kong, Weihao; Zhang, Pu; Li, Zhong‐Ming; Dong, Zhen

doi:10.3390/app9132738

Cited by 26 publications

(15 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We only focus on the TM polarized SPPs propagating along z axis. The propagation constants and mode profiles of supermodes in waveguide arrays can be figured out by transfer matrix method [1,55], which is based on the boundary condition of the electromagnetic field. Moreover, we also calculate the wave propagation in the structure performed based on the finite element method.…”

Section: Graphene Waveguide Arraysmentioning

confidence: 99%

Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays

Zhang

Zhao

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

We investigate the topological bound modes of surface plasmon polaritons (SPPs) in a graphene pair waveguide array. The arrays are with uniform inter-layer and intra-layer spacings but the chemical potential of two graphene in each pair are different. The topological bound modes emerge when two arrays with opposite sequences of chemical potential are interfaced, which are analogous to Jackiw-Rebbi modes with opposite mass. We show the topological bound modes can be dynamically controlled by tuning the chemical potential, and the propagation loss of topological bound modes can be remarkably reduced by decreasing the chemical potential. Thanks to the strong confinement of graphene SPPs, the modal wavelength of topological bound modes can be squeezed as small as 1/70 of incident wavelength. The study provides a promising approach to realizing robust light transport beyond diffraction limit.

show abstract

Section: Graphene Waveguide Arraysmentioning

confidence: 99%

Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays

Zhang

Zhao

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Parity-Time (PT) symmetry has shown great potential as ultra-sensitive sensors [1,2], Wireless Power Transfer (WPT [3][4][5]), gain/loss controlled lasers [6], and absorber [7], in both the photonics [8,9] and microwave [10] regimes. PT symmetry is a physics phenomenon that originates from the quantum community: it was first proposed in quantum mechanics by Bender and Boettcher in 1998 [11].…”

Section: Introductionmentioning

confidence: 99%

Rigorous Quantum Formulation of Parity-Time Symmetric Coupled Resonators

Liao¹,

Ou²

2020

PIER M

View full text Add to dashboard Cite

Rigorous quantum formulation of the Parity-Time (PT) symmetry phenomenon in the RF/microwave regime for a pair of coil resonators with lump elements has been presented. The coil resonator is described by the lump-element model that consists of an inductor (L), a resistor (R), and a capacitor (C). Rigorous quantum Hamiltonian for the coupled RLC coil resonators system has been derived through twice basis transforms of the original basis. The first basis transform rotates the original basis such that off-diagonal terms of the governing matrix of the equation system of the coupled coil resonators is reduced to constants. Then a second basis transform obtains the quantum Hamiltonian, including the diagonal effective complex frequencies and off-diagonal coupling terms, together with the transformed basis. With the obtained quantum Hamiltonian, the eigenvalues and eigenvectors of the coupled coil resonators can be obtained as usual as the quantum Hamiltonian. Finally, numerical simulation verifies the correctness of the theory. The quantum formulation of the coupled coil resonators can provide better guideline to design a better PT-symmetric system.

show abstract

“…Non-Hermite, which stems from quantum mechanics [1], has promptly expanded to optics [2][3][4][5], acoustics [6], and electronics [7]. Systems including gain or loss are non-Hermitian [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Exceptional Points in Non-Hermitian Photonic Crystals Incorporated With a Defect

et al. 2020

View full text Add to dashboard Cite

We explored exceptional points (EPs) in one dimensional non-Hermitian photonic crystals incorporated with a defect. The defect was asymmetric with respect to the center. Two EPs could be derived by modulating the normalized frequency and the gain-loss coefficient of defect. The reflection coefficient complex phase changed dramatically around EPs, and the change in complex phase was π at EPs. The electric field of EPs was mainly restricted to the defect, which can induce a giant Goos–Hänchen (GH) shift. Moreover, we found a coherent perfect absorption-laser point (CPA-LP) in the structure. A giant GH shift also existed around the CPA-LP. The study may have found applications in highly sensitive sensors.

show abstract

Coherent Perfect Absorption Laser Points in One-Dimensional Anti-Parity–Time-Symmetric Photonic Crystals

Cited by 26 publications

References 69 publications

Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays

Plasmonic Jackiw-Rebbi Modes in Graphene Waveguide Arrays

Rigorous Quantum Formulation of Parity-Time Symmetric Coupled Resonators

Exceptional Points in Non-Hermitian Photonic Crystals Incorporated With a Defect

Contact Info

Product

Resources

About