Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/90173
Title: Realization of Hofstadter's butterfly and a one-way edge mode in a polaritonic system
Authors: Banerjee, Rimi
Liew, Timothy Chi Hin
Kyriienko, O.
Keywords: Hofstadter’s Butterfly
Polaritonic
DRNTU::Science::Physics
Issue Date: 2018
Source: Banerjee, R., Liew, T. C. H., & Kyriienko, O. (2018). Realization of Hofstadter's butterfly and a one-way edge mode in a polaritonic system. Physical Review B, 98(7), 075412-. doi: 10.1103/PhysRevB.98.075412
Series/Report no.: Physical Review B
Abstract: We present a scheme to generate an artificial gauge field for the system of neutral bosons, represented by polaritons in micropillars arranged into a square lattice. The splitting between the two polarizations of the micropillars breaks the time-reversal symmetry (TRS) and results in the effective phase-dependent hopping between cavities. This can allow for engineering a nonzero flux on the plaquette, corresponding to an artificial magnetic field. Changing the phase, we observe a characteristic Hofstadter's butterfly pattern and the appearance of chiral edge states for a finite-size structure. For long-lived polaritons, we show that the propagation of wave packets at the edge is robust against disorder. Moreover, given the inherent driven-dissipative nature of polariton lattices, we find that the system can exhibit topological lasing, recently discovered for active ring cavity arrays. The results point to a static way to realize artificial magnetic field in neutral spinful systems, avoiding the periodic modulation of the parameters or strong spin-orbit interaction. Ultimately, the described system can allow for high-power topological single-mode lasing which is robust to imperfections.
URI: https://hdl.handle.net/10356/90173
http://hdl.handle.net/10220/47196
ISSN: 2469-9950
DOI: 10.1103/PhysRevB.98.075412
Rights: © 2018 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevB.98.075412]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
Realization of Hofstadter’s butterfly.pdf823.47 kBAdobe PDFThumbnail
View/Open

SCOPUSTM   
Citations 20

5
checked on Aug 31, 2020

WEB OF SCIENCETM
Citations 50

4
checked on Sep 25, 2020

Page view(s) 50

135
checked on Sep 25, 2020

Download(s) 50

20
checked on Sep 25, 2020

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.