Incident Direction Independent Wave Propagation and Unidirectional Lasing.

@article{Jin2018IncidentDI,
  title={Incident Direction Independent Wave Propagation and Unidirectional Lasing.},
  author={L. Jin and Z. Song},
  journal={Physical review letters},
  year={2018},
  volume={121 7},
  pages={
          073901
        }
}
  • L. Jin, Z. Song
  • Published 31 March 2018
  • Physics
  • Physical review letters
We propose an incident direction independent wave propagation generated by properly assembling different unidirectional destructive interferences (UDIs), which is a consequence of the appropriate match between synthetic magnetic fluxes and the incident wave vector. Single-direction lasing at spectral singularity is feasible without introducing nonlinearity. UDI allows unidirectional lasing and unidirectional perfect absorption; when they are combined in a parity-time-symmetric manner, the… 
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References

SHOWING 1-10 OF 115 REFERENCES
Unidirectional Perfect Absorber
We show an interplay between Fano resonances and a judicious absorption mechanism leads to a unidirectional perfect absorber, which can be controlled in both direction and frequency. Critical
Non-reciprocal transmission in photonic lattices based on unidirectional coherent perfect absorption.
A method for realizing asymmetric (one-way) transmission of discretized light in modulated, linear, and purely passive optical lattices is suggested, which exploits the idea of unidirectional
Asymmetric wave propagation in nonlinear systems.
TLDR
A class of exact extended solutions is constructed such that waves with the same frequency and incident amplitude impinging from left and right directions have very different transmission coefficients.
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.
Coherent perfect absorbers: Time-reversed lasers
TLDR
The effect may be demonstrated in a Si slab illuminated in the 500–900nm range and form a novel class of linear optical elements—absorptive interferometers—which may be useful for controlled optical energy transfer.
Time-Reversed Lasing and Interferometric Control of Absorption
TLDR
The device, termed a “coherent perfect absorber,” functions as an absorptive interferometer, with potential practical applications in integrated optics, and it is demonstrated that absorption can be reduced substantially by varying the relative phase of the incident fields.
Reciprocal and unidirectional scattering of parity-time symmetric structures
TLDR
This work shows the reciprocal reflection/transmission in -symmetric system is closely related to the type of symmetry, that is, the axial (reflection) symmetry leads to reciprocal reflection (transmission).
Chiral modes and directional lasing at exceptional points
TLDR
It is shown how to impose a strong chirality and a switchable direction of light propagation in an optical system by steering it to an exceptional point (EP)—a degeneracy universally occurring in all open physical systems when two eigenvalues and the corresponding eigenstates coalesce.
Unidirectional lasing emerging from frozen light in nonreciprocal cavities.
TLDR
A class of unidirectional lasing modes associated with the frozen mode regime of nonreciprocal slow-wave structures that can only exist in cavities with broken time-reversal and space inversion symmetries are introduced.
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
...
1
2
3
4
5
...