Photonic anomalous quantum hall effect

We experimentally realize a photonic analogue of the anomalous quantum Hall insulator using a two-dimensional (2D) array of coupled ring resonators. Similar to the Haldane model, our 2D array is translation invariant, has a zero net gauge flux threading the lattice, and exploits next-nearest neighbo...

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Main Authors: Mittal, Sunil, Orre, Venkata Vikram, Leykam, Daniel, Chong, Yi Dong, Mohammad Hafezi
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/106410
http://hdl.handle.net/10220/49630
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1064102023-02-28T19:22:45Z Photonic anomalous quantum hall effect Mittal, Sunil Orre, Venkata Vikram Leykam, Daniel Chong, Yi Dong Mohammad Hafezi School of Physical and Mathematical Sciences Centre for Disruptive Photonic Technologies Photonics Optical & Microwave Phenomena Science::Physics We experimentally realize a photonic analogue of the anomalous quantum Hall insulator using a two-dimensional (2D) array of coupled ring resonators. Similar to the Haldane model, our 2D array is translation invariant, has a zero net gauge flux threading the lattice, and exploits next-nearest neighbor couplings to achieve a topologically nontrivial band gap. Using direct imaging and on-chip transmission measurements, we show that the band gap hosts topologically robust edge states. We demonstrate a topological phase transition to a conventional insulator by frequency detuning the ring resonators and thereby breaking the inversion symmetry of the lattice. Furthermore, the clockwise or the counterclockwise circulation of photons in the ring resonators constitutes a pseudospin degree of freedom. The two pseudospins acquire opposite hopping phases, and their respective edge states propagate in opposite directions. These results are promising for the development of robust reconfigurable integrated nanophotonic devices for applications in classical and quantum information processing. MOE (Min. of Education, S’pore) Published version 2019-08-14T07:02:47Z 2019-12-06T22:11:04Z 2019-08-14T07:02:47Z 2019-12-06T22:11:04Z 2019 Journal Article Mittal, S., Orre, V. V., Leykam, D., Chong, Y., & Mohammad Hafezi. (2019). Photonic anomalous quantum hall effect. Physical Review Letters, 123(4), 043201-. doi:10.1103/PhysRevLett.123.043201 0031-9007 https://hdl.handle.net/10356/106410 http://hdl.handle.net/10220/49630 10.1103/PhysRevLett.123.043201 en Physical Review Letters © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Letters and is made available with permission of American Physical Society. 6 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Photonics
Optical & Microwave Phenomena
Science::Physics
spellingShingle Photonics
Optical & Microwave Phenomena
Science::Physics
Mittal, Sunil
Orre, Venkata Vikram
Leykam, Daniel
Chong, Yi Dong
Mohammad Hafezi
Photonic anomalous quantum hall effect
description We experimentally realize a photonic analogue of the anomalous quantum Hall insulator using a two-dimensional (2D) array of coupled ring resonators. Similar to the Haldane model, our 2D array is translation invariant, has a zero net gauge flux threading the lattice, and exploits next-nearest neighbor couplings to achieve a topologically nontrivial band gap. Using direct imaging and on-chip transmission measurements, we show that the band gap hosts topologically robust edge states. We demonstrate a topological phase transition to a conventional insulator by frequency detuning the ring resonators and thereby breaking the inversion symmetry of the lattice. Furthermore, the clockwise or the counterclockwise circulation of photons in the ring resonators constitutes a pseudospin degree of freedom. The two pseudospins acquire opposite hopping phases, and their respective edge states propagate in opposite directions. These results are promising for the development of robust reconfigurable integrated nanophotonic devices for applications in classical and quantum information processing.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Mittal, Sunil
Orre, Venkata Vikram
Leykam, Daniel
Chong, Yi Dong
Mohammad Hafezi
format Article
author Mittal, Sunil
Orre, Venkata Vikram
Leykam, Daniel
Chong, Yi Dong
Mohammad Hafezi
author_sort Mittal, Sunil
title Photonic anomalous quantum hall effect
title_short Photonic anomalous quantum hall effect
title_full Photonic anomalous quantum hall effect
title_fullStr Photonic anomalous quantum hall effect
title_full_unstemmed Photonic anomalous quantum hall effect
title_sort photonic anomalous quantum hall effect
publishDate 2019
url https://hdl.handle.net/10356/106410
http://hdl.handle.net/10220/49630
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