• Corpus ID: 118746724

Dissipation-Induced Super Scattering and Lasing PT-Spaser

@article{Feng2015DissipationInducedSS,
  title={Dissipation-Induced Super Scattering and Lasing PT-Spaser},
  author={Simin Feng},
  journal={arXiv: Optics},
  year={2015}
}
  • S. Feng
  • Published 28 February 2015
  • Physics
  • arXiv: Optics
Giant transmission and reflection of a finite bandwidth are shown to occur at the same wavelength when the electromagnetic wave is incident on a periodic array of PT-symmetric dimers embedded in a metallic film. Remarkably, we found that this phenomenon vanishes if the metallic substrate is lossless while keeping other parameters unchanged. When the metafilm is adjusted to the vicinity of a spectral singularity, tuning substrate dissipation to a critical value can lead to supper scattering in… 
1 Citations

Tailoring Eigenmodes at Spectral Singularities in Graphene-based PT Systems

TLDR
This work investigates the spectral singularity in the hybrid structure composed of the photoexcited graphene and one-dimensional PT-diffractive grating and finds that spectral singularities can exhibit symmetry-modes, when the loss and gain of the grating is unbalanced.

References

SHOWING 1-10 OF 64 REFERENCES

PT-symmetric laser absorber

In a recent work, Y. D. Chong et al. [Phys. Rev. Lett. 105, 053901 (2010)] proposed the idea of a coherent perfect absorber (CPA) as the time-reversed counterpart of a laser, in which a purely

Tunneling of obliquely incident waves through PT -symmetric epsilon-near-zero bilayers

We show that obliquely-incident, transversely-magnetic-polarized plane waves can be totally transmitted (with zero reection) through epsilon-near-zero (ENZ) bi-layers characterized by balanced loss

Experimental demonstration of a unidirectional reflectionless parity-time metamaterial at optical frequencies.

TLDR
The demonstrated unidirectional phenomenon at the corresponding parity-time exceptional point on-a-chip confirms the feasibility of creating complicated on-chip parity- time metamaterials and optical devices based on their properties.

Analytic results for a PT-symmetric optical structure

Propagation of light through a medium with a complex refractive index in which gain and loss are engineered to be PT symmetric has many remarkable features. In particular the usual unitarity

Surface plasmon lasing observed in metal hole arrays.

TLDR
Experimental observations support that a metal hole array with a semiconductor (InGaAs) gain layer placed in close (20 nm) proximity of the metal hole arrays shows surface plasmon lasing.

Effective Spontaneous PT-symmetry Breaking in Hybridized Metamaterials

School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK(Dated: January 8, 2014)We show that metamaterials can be used as a testing ground to investigate spontaneous symmetry

Experimental demonstration of a coherent perfect absorber with PT phase transition.

We report the realization of a coherent perfect absorber, using a pair of passive resonators coupled to a microwave transmission line in the background, which can completely absorb light in its

PT-symmetry breaking and laser-absorber modes in optical scattering systems.

TLDR
Using a scattering matrix formalism, the general scattering properties of optical structures that are symmetric under a combination of parity and time reversal (PT) are derived and a transition between PT-symmetric scattering eigenstates, which are norm preserving, and symmetry-broken pairs of eigenstate exhibiting net amplification and loss is demonstrated.

Loss-induced suppression and revival of lasing

TLDR
Overturning conventional wisdom that loss is bad and should be minimized, Peng et al. show that carefully tweaking the coupling strength between the various components of a coupled optical system can actually result in an enhancement of the optical properties by adding more loss into the system.

Reversing the pump dependence of a laser at an exceptional point

TLDR
It is shown that exceptional points can be conveniently induced in a photonic molecule laser by a suitable variation of the applied pump, including a strongly decreasing intensity of the emitted laser light for increasing pump power.
...