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Tunable optical spin Hall effect in a liquid crystal microcavity

Tunable optical spin Hall effect in a liquid crystal microcavity
Tunable optical spin Hall effect in a liquid crystal microcavity

The spin Hall effect, a key enabler in the field of spintronics, underlies the capability to control spin currents over macroscopic distances. The effect was initially predicted by D'Yakonov and Perel1 and has been recently brought to the foreground by its realization in paramagnetic metals by Hirsch2 and in semiconductors3 by Sih et al. Whereas the rapid dephasing of electrons poses severe limitations to the manipulation of macroscopic spin currents, the concept of replacing fermionic charges with neutral bosons such as photons in stratified media has brought some tangible advances in terms of comparatively lossless propagation and ease of detection4–7. These advances have led to several manifestations of the spin Hall effect with light, ranging from semiconductor microcavities8,9 to metasurfaces10. To date the observations have been limited to built-in effective magnetic fields that underpin the formation of spatial spin currents. Here we demonstrate external control of spin currents by modulating the splitting between transverse electric and magnetic fields in liquid crystals integrated in microcavities.

2095-5545
Lekenta, Katarzyna
5d79b858-68b4-48de-be50-788ff35616d9
Król, Mateusz
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Mirek, Rafał
f915d92d-fd33-467f-a27c-35741d5be06e
Łempicka, Karolina
eae6bd99-c8d1-444c-b432-5d7d857388dc
Stephan, Daniel
4fe8e78e-1c47-423d-9e2e-4e38fc5e6de1
Mazur, Rafał
2d6cd46a-6f03-469b-a9bb-c24817302963
Morawiak, Przemysław
fa2666ff-60e8-4500-b0a2-9a9a1b66a756
Kula, Przemysław
7dc03912-1272-4b6b-a41d-6d8c7e15df6d
Piecek, Wiktor
43c10475-275e-47e9-b0f0-a6df3d325ffb
Lagoudakis, Pavlos G.
ea50c228-f006-4edf-8459-60015d961bbf
Piętka, Barbara
7fcdcba0-5b64-41ef-ad60-429855632a10
Szczytko, Jacek
14bed84c-2dcf-4e60-93cf-41e77f495422
Lekenta, Katarzyna
5d79b858-68b4-48de-be50-788ff35616d9
Król, Mateusz
604ee0ad-3fe7-4574-b54c-2212d4dc81e1
Mirek, Rafał
f915d92d-fd33-467f-a27c-35741d5be06e
Łempicka, Karolina
eae6bd99-c8d1-444c-b432-5d7d857388dc
Stephan, Daniel
4fe8e78e-1c47-423d-9e2e-4e38fc5e6de1
Mazur, Rafał
2d6cd46a-6f03-469b-a9bb-c24817302963
Morawiak, Przemysław
fa2666ff-60e8-4500-b0a2-9a9a1b66a756
Kula, Przemysław
7dc03912-1272-4b6b-a41d-6d8c7e15df6d
Piecek, Wiktor
43c10475-275e-47e9-b0f0-a6df3d325ffb
Lagoudakis, Pavlos G.
ea50c228-f006-4edf-8459-60015d961bbf
Piętka, Barbara
7fcdcba0-5b64-41ef-ad60-429855632a10
Szczytko, Jacek
14bed84c-2dcf-4e60-93cf-41e77f495422

Lekenta, Katarzyna, Król, Mateusz, Mirek, Rafał, Łempicka, Karolina, Stephan, Daniel, Mazur, Rafał, Morawiak, Przemysław, Kula, Przemysław, Piecek, Wiktor, Lagoudakis, Pavlos G., Piętka, Barbara and Szczytko, Jacek (2018) Tunable optical spin Hall effect in a liquid crystal microcavity. Light: Science & Applications, 7 (1). (doi:10.1038/s41377-018-0076-z).

Record type: Letter

Abstract

The spin Hall effect, a key enabler in the field of spintronics, underlies the capability to control spin currents over macroscopic distances. The effect was initially predicted by D'Yakonov and Perel1 and has been recently brought to the foreground by its realization in paramagnetic metals by Hirsch2 and in semiconductors3 by Sih et al. Whereas the rapid dephasing of electrons poses severe limitations to the manipulation of macroscopic spin currents, the concept of replacing fermionic charges with neutral bosons such as photons in stratified media has brought some tangible advances in terms of comparatively lossless propagation and ease of detection4–7. These advances have led to several manifestations of the spin Hall effect with light, ranging from semiconductor microcavities8,9 to metasurfaces10. To date the observations have been limited to built-in effective magnetic fields that underpin the formation of spatial spin currents. Here we demonstrate external control of spin currents by modulating the splitting between transverse electric and magnetic fields in liquid crystals integrated in microcavities.

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Accepted/In Press date: 23 September 2018
e-pub ahead of print date: 10 October 2018
Published date: 1 December 2018

Identifiers

Local EPrints ID: 425476
URI: https://eprints.soton.ac.uk/id/eprint/425476
ISSN: 2095-5545
PURE UUID: 485283c8-bee0-48a9-b5ad-3961ee91e54a

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Date deposited: 22 Oct 2018 16:30
Last modified: 13 Mar 2019 17:55

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Contributors

Author: Katarzyna Lekenta
Author: Mateusz Król
Author: Rafał Mirek
Author: Karolina Łempicka
Author: Daniel Stephan
Author: Rafał Mazur
Author: Przemysław Morawiak
Author: Przemysław Kula
Author: Wiktor Piecek
Author: Barbara Piętka
Author: Jacek Szczytko

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