Simultaneous Realization of Coherent Perfect Absorber and Laser by Zero-Index Media with both Gain and Loss
arXiv:1608.07003 · doi:10.1103/PhysRevA.94.063841
Abstract
We investigate a unique type of zero-index medium with both gain and loss (ZIMGL), whose effective permittivity and permeability are purely imaginary and of opposite signs. We show analytically that, by using a slab of ZIM-GL with equal magnitude of loss and gain, coherent perfect absorber (CPA) and laser, i.e. the socalled CPA-laser, can be achieved simultaneously. CPA-laser has been found previously in parity-time (PT) symmetric systems. However, the underlying physics in a PT-symmetric system is distinct from that in a ZIM-GL. By designing a photonic crystal (PC) composed of core-shell rods, with loss and gain distributed in either the core or the shell, we have realized such a ZIM-GL. The CPA-laser functionality of such a PC is also confirmed in our numerical simulations. Our work provides a different approach for simultaneous realization of CPA and laser besides PTsymmetric systems.
arXiv comment20 pages, 5 figures
References in corpus (16)
- Coherent Perfect Absorbers: Time-reversed Lasers
- PT-symmetry breaking and laser-absorber modes in optical scattering systems
- PT-symmetric laser-absorber
- Conservation relations and anisotropic transmission resonances in one-dimensional PT-symmetric photonic heterostructures
- Do Linear Dispersions of Classical Waves Mean Dirac Cones?
- Effective spontaneous PT-symmetry breaking in hybridized metamaterials
- Semi-Dirac dispersion relation in photonic crystals
- Tunneling of Obliquely-Incident Waves through PT-Symmetric Epsilon-Near-Zero Bi-Layers
- Breaking of PT-symmetry in bounded and unbounded scattering systems
- A unified theory for perfect absorption in ultra-thin absorptive films with constant tangential electric or magnetic fields
- Self-dual Spectral Singularities and Coherent Perfect Absorbing Lasers without PT-symmetry
- Parity-time symmetry from stacking purely dielectric and magnetic slabs
- Bloch oscillations in complex crystals with PT symmetry
- Point Interactions, Metamaterials, and PT-Symmetry
- A unidirectional invisible PT-symmetric complex crystal with arbitrary thickness
- Conjugate metamaterials and the perfect lens
Cited by in corpus (15)
- Coherent perfect absorbers: linear control of light with light
- Experimental demonstration of an anisotropic exceptional point
- Experimental demonstration of asymmetric diffraction based on a passive parity-time-symmetric acoustic grating
- Exceptional points and spectral singularities in active epsilon-near-zero plasmonic waveguides
- Tunable nonlinear coherent perfect absorption with epsilon-near-zero plasmonic waveguides
- Contrasting Spectral Signatures and Sensitivities of CPA-Lasing in a -Symmetric Periodic Structure
- On-demand coherent perfect absorption in complex scattering systems: time delay divergence and enhanced sensitivity to perturbations
- Coherent perfect absorber and laser in purely imaginary conjugate metamaterials
- Realization of complex conjugate media using non-PT-symmetric photonic crystals
- CPA-laser effect and exceptional points in PT-symmetric multilayer structures
- Effective medium theory for photonic pseudospin-1/2 system
- Coherent perfect absorption and laser modes in a cylindrical structure of conjugate metamaterials
- Epsilon-near-zero plasmonic waveguides to enhance nonlinear coherent light-matter interactions
- Photonic-Spin governed absorption in a mu-near-zero subwavelength gyromagnetic cylinder
- Negative refraction based on purely imaginary conjugate metamaterials