Demonstration of Parity–Time Symmetry in Optically Induced Atomic Lattices

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Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Demonstration of Parity–Time Symmetry in Optically Induced Atomic Lattices
Author(s)
zhaoyang zhang
Affiliation(s)
Xi'an Jiaotong University
KEYWORDS
Parity–Time Symmetry, Optically Induced Atomic Lattices
ABSTRACT
Parity-time (PT) symmetry in optics has been experimentally demonstrated recently in several coupled gain-loss solid-state material systems by purposefully engineering the refractive indices. Many intriguing and applied features emerge under such PT-symmetry platform, such as power oscillations, optical solitons in PT-symmetric lattices, and nonreciprocal light transmission. Considering that multi-level atomic gases are quite efficient in constructing desired refractive index profiles, schemes based on atomic coherence have been recently proposed to realize optical potentials involving PT-symmetric properties. For the first time, we have experimentally realized optical lattice with tunable gain-loss waveguides in a coherently-prepared four-level N-type atomic system. Particularly, an abrupt phase shift jump has been clearly observed which indicates the PT-symmetry breaking by appropriately tuning the pertinent atomic parameters. The experimental demonstration of such readily reconfigurable, effectively controllable and low-cost PT-symmetric periodic structures sets a new stage in better understanding various properties of PT symmetry optics and realizing desirable applications.