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Nonreciprocal Localization of Photons.

Hamidreza Ramezani1,2, Pankaj K Jha1, Yuan Wang1,3

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Physical Review Letters
|February 14, 2018
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Summary
This summary is machine-generated.

Researchers achieved nonreciprocal photon localization in a moving photonic lattice. This breakthrough enables directional control of light, impacting photonics, condensed matter, and acoustics for new device applications.

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Area of Science:

  • Photonics
  • Condensed Matter Physics
  • Acoustics

Background:

  • Spatiotemporal modulation of atomic response creates moving photonic lattices.
  • Dispersion in these lattices exhibits a spectral Doppler shift relative to the probe direction.

Purpose of the Study:

  • To demonstrate nonreciprocal photon localization in a moving photonic lattice.
  • To explore the directional dependence of light localization and frequency shifting.

Main Methods:

  • Fabrication of a moving photonic lattice via spatiotemporal modulation of atomic response.
  • Introduction of a static defect within the moving lattice.
  • Analysis of light propagation and localization phenomena.

Main Results:

  • Spatial localization of light within the band gap of the moving lattice was achieved.
  • The localized light exhibits a frequency shift dependent on the incident field's direction relative to the lattice motion.
  • Demonstrated nonreciprocal behavior in photon localization.

Conclusions:

  • Nonreciprocal photon localization in moving photonic lattices is feasible.
  • This phenomenon offers potential for novel devices like isolators, circulators, and unidirectional lasers.
  • The findings have implications across photonics, condensed matter, and acoustics.