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Coherent absorption of two-photon states in metamaterials

Coherent absorption of two-photon states in metamaterials
Coherent absorption of two-photon states in metamaterials
Multiple photon absorption processes typically have a nonlinear dependence on the amplitude of the incident optical field. On the other hand, quantum technologies rely on single photon events. It has therefore been of great technical difficulty to achieve nonlinear devices using single photons. This is due to the small cross-section of absorption in room temperature devices, with multi-photon absorption events occurring with extremely low probability. The lack of access to nonlinear processes severely inhibits the use of optics for a large number of applications surrounding quantum technologies. We demonstrate experimentally that by exploiting a coherent absorption mechanism for N=2 N00N states, outlined theoretically by Jeffers in 2000 [1] and experimentally explored by Roger et. al. in 2016 [2], that it is possible to determine and enhance the number of two photon states that are absorbed. Here a 50% absorbing metasurface is placed inside a Sagnac interferometer into which we inject a N00N state. We show that by tuning the phase φ of the input state, |2,0〉 + exp(-ί2φ) |0,2〉, we can selectively tune the output state. For an input phase of φ = π/2 or 3π/2 we find that a single photon is absorbed with 100% probability. However, when we tune the input phase to φ = 0 or π we see that either 0 or 2 photons are absorbed with equal probability. We have developed a theoretical model that, with no free parameters, fits the experimentally measured two-photon contribution and finds the maximum contribution of |0,0) (0,0| to the output state to be 40.5%.
IEEE
Roger, Thomas
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Lyons, Ashley
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Oren, Dikla
5fd7dab2-a274-4ea6-9fa7-32648cb56fd6
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Valente, Joao
b1d50ead-5c3d-4416-ad05-3beb1b373146
Vezzoli, Stefano
a72f5f1c-8add-4b1b-9dab-01dfb83180e6
Segev, Merdechai
2dc4d891-3e1a-49d2-aa49-85466400cd3c
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Faccio, Daniele
044c19fc-9f82-41f6-8a61-3c6e9ef20674
Roger, Thomas
b7d10549-0531-4dde-b335-c998b6fd38e8
Lyons, Ashley
6e8ef6ab-d565-4922-a159-0dc766df038c
Oren, Dikla
5fd7dab2-a274-4ea6-9fa7-32648cb56fd6
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Valente, Joao
b1d50ead-5c3d-4416-ad05-3beb1b373146
Vezzoli, Stefano
a72f5f1c-8add-4b1b-9dab-01dfb83180e6
Segev, Merdechai
2dc4d891-3e1a-49d2-aa49-85466400cd3c
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Faccio, Daniele
044c19fc-9f82-41f6-8a61-3c6e9ef20674

Roger, Thomas, Lyons, Ashley, Oren, Dikla, Savinov, Vassili, Valente, Joao, Vezzoli, Stefano, Segev, Merdechai, Zheludev, Nikolai and Faccio, Daniele (2017) Coherent absorption of two-photon states in metamaterials. In 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE. 1 pp . (doi:10.1109/CLEOE-EQEC.2017.8087659).

Record type: Conference or Workshop Item (Paper)

Abstract

Multiple photon absorption processes typically have a nonlinear dependence on the amplitude of the incident optical field. On the other hand, quantum technologies rely on single photon events. It has therefore been of great technical difficulty to achieve nonlinear devices using single photons. This is due to the small cross-section of absorption in room temperature devices, with multi-photon absorption events occurring with extremely low probability. The lack of access to nonlinear processes severely inhibits the use of optics for a large number of applications surrounding quantum technologies. We demonstrate experimentally that by exploiting a coherent absorption mechanism for N=2 N00N states, outlined theoretically by Jeffers in 2000 [1] and experimentally explored by Roger et. al. in 2016 [2], that it is possible to determine and enhance the number of two photon states that are absorbed. Here a 50% absorbing metasurface is placed inside a Sagnac interferometer into which we inject a N00N state. We show that by tuning the phase φ of the input state, |2,0〉 + exp(-ί2φ) |0,2〉, we can selectively tune the output state. For an input phase of φ = π/2 or 3π/2 we find that a single photon is absorbed with 100% probability. However, when we tune the input phase to φ = 0 or π we see that either 0 or 2 photons are absorbed with equal probability. We have developed a theoretical model that, with no free parameters, fits the experimentally measured two-photon contribution and finds the maximum contribution of |0,0) (0,0| to the output state to be 40.5%.

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More information

Published date: 25 June 2017
Venue - Dates: 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), , Munich, Germany, 2017-06-25 - 2017-06-29

Identifiers

Local EPrints ID: 417728
URI: http://eprints.soton.ac.uk/id/eprint/417728
PURE UUID: 03346d2c-ae6b-4051-b550-8726030cb500
ORCID for Vassili Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 12 Feb 2018 17:30
Last modified: 17 Mar 2024 03:19

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Contributors

Author: Thomas Roger
Author: Ashley Lyons
Author: Dikla Oren
Author: Vassili Savinov ORCID iD
Author: Joao Valente
Author: Stefano Vezzoli
Author: Merdechai Segev
Author: Nikolai Zheludev ORCID iD
Author: Daniele Faccio

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