Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

AlGaAs waveguide generation of counterpropagating twin photons

L. Lanco, S. Ducci, J.-P. Likforman, M. Ravaro, V. Berger, Giuseppe Leo

Published May 4, 2007• 0 citations
Publisher

Abstract

We demonstrate an integrated semiconductor source of counterpropagating twin photons in the telecom range. A pump beam impinging on top of an AlGaAs waveguide generates parametrically two counterpropagating, orthogonally polarized signal/idler guided modes. A 2 mm long waveguide emits at room temperature one average photon pair per pump pulse, with a spectral linewidth of 0.15 nm. The twin nature of the emitted photons is tested through a time-correlation measurement.

DOI
10.1117/12.723128

Related papers

Semiconductor Waveguide Source of Counterpropagating Twin Photons

L. Lanco, S. Ducci, J.-P. Likforman +5 more

We experimentally demonstrate an integrated semiconductor source of counterpropagating twin photons in the telecom range. A pump beam impinging on top of an AlGaAs waveguide generates parametrically two counterpropagating, orthogonally polarized signal/idler guided modes. A 2 mm long waveguide emits at room temperature one average photon pair per pump pulse, with a spectral linewidth of 0.15 nm. The twin character of the emitted photons is ascertained through a time-correlation measurement. This work opens a route towards new guided-wave semiconductor quantum devices.

Physical Review Letters•Oct 23, 2006•91 citations

A semiconductor source of counterpropagating twin photons: a versatile device allowing the control of the two-photon state

Xavier Caillet, V. Berger, Giuseppe Leo +1 more

We report on an integrated source of twin photons at telecom wavelength operating at room temperature, in which a pump beam impinging on top of an AlGaAs waveguide generates two counterpropagating, orthogonally polarized guided modes by parametric fluorescence. This scheme allows an unprecedented flexibility in controlling the quantum properties of the emitted photons, by a simple shaping of the spatial and spectral profiles of the pump. The source versatility permits us to tailor the degree of frequency correlation and the spectrum of the emitted photons.

Journal of Modern Optics•Nov 6, 2008•30 citations

Counterpropagating Twin Photons in the Telecom Range: a Narrow-Bandwidth Semiconductor Source

S. Ducci, L. Lanco, J.-P. Likforman +5 more

We experimentally demonstrate a counterpropagating twin photons source consisting of an AlGaAs multilayer waveguide. In our geometry, a pump beam impinging on top of a waveguide generates parametrically two counter propagating, orthogonally polarized signal/idler guided modes through a type II nonlinear interaction. Two phase-matched processes occur simultaneously in our scheme: in the first one, the photon copropagating with the z component of the pump beam is TM polarized and the counter propagating one is TE polarized. In the second one, the vice versa occurs. The most attractive application of this device is a narrow-bandwidth fibered source of entangled photon pairs, where signal and idler photons are collected at the opposite waveguide facets with low coupling losses.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 1, 2007•2 citations

Nonlinear AlGaAs waveguide for the generation of counterpropagating twin photons in the telecom range

M. Ravaro, Yannick Seurin, S. Ducci +4 more

We have designed and fabricated a set of AlGaAs multilayer waveguides, which can serve as a source of entangled photons at 1.55μm through parametric fluorescence. In our scheme two counterpropagating, orthogonally polarized signal/idler modes are nonlinearly generated by a pump wave impinging on the upper surface of the waveguide. To check the compliance with design specifications on phase-matching wavelength and parametric gain, we have systematically measured effective indices and surface-emitting second-harmonic generation, respectively. This characterization allowed us to single out a nominal sample with optimum performances, which we numerically modeled for counterpropagating parametric fluorescence. We predict a pair generation efficiency ηPF=4×10−13 (signal photons per pump photon). For a 1W (peak), 100ns pump pulse at normal incidence, this corresponds to about 14 photons per dark count with state-of-the-art avalanche photodiodes.

Journal of Applied Physics•Sep 15, 2005•29 citations

A semiconductor ridge microcavity source of quantum light at room temperature

Adeline Orieux, Xavier Caillet, Aristide Lemaître +4 more

We demonstrate an integrated semiconductor ridge microcavity source of counterpropagating twin photons at room temperature in the telecom range. Based on type II parametric down conversion in a counterpropagating phase matching scheme with transverse pump, the device generates around 10-11 pairs/pump photons having a 0.3 nm bandwidth for a 1 mm long waveguide. The emission spectrum shows the existence of two equally probable processes, which is a preliminary step to the direct generation of Bell states. The twin character of the photons of each pair is demonstrated via a temporal correlation measurement. These results open the way to the demonstration of several interesting features associated to the counterpropagating geometry, such as the control of the frequency correlation degree via the spatial and spectral properties of the pump beam.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 30, 2010•0 citations

Two-photon interference with a semiconductor integrated source at room temperature

Xavier Caillet, Adeline Orieux, Aristide Lemaître +4 more

We experimentally demonstrate an integrated semiconductor ridge microcavity source of counterpropagating twin photons at room temperature in the telecom range. Based on type II parametric down conversion with a counterpropagating phase-matching, pump photons generate photon pairs with an efficiency of about 10(-11) and a spectral linewidth of 0.3 nm for a 1 mm long sample. The indistiguishability of the photons of the pair is measured via a Hong-Ou-Mandel two-photon interference experiment showing a visibility of 85 %. This work opens a route towards new guided-wave semiconductor quantum devices.

Optics Express•Apr 28, 2010•27 citations
We demonstrate an integrated semiconductor source of counterpropagating twin photons in the telecom range. A pump beam impinging on top of an AlGaAs waveguide generates parametrically two counterpropagating, orthogonally polarized signal/idler guided modes. A 2 mm long waveguide emits at room temperature one average photon pair per pump pulse, with a spectral linewidth of 0.15 nm. The twin nature of the emitted photons is tested through a time-correlation measurement.
We experimentally demonstrate an integrated semiconductor source of counterpropagating twin photons in the telecom range. A pump beam impinging on top of an AlGaAs waveguide generates parametrically two counterpropagating, orthogonally polarized signal/idler guided modes. A 2 mm long waveguide emits at room temperature one average photon pair per pump pulse, with a spectral linewidth of 0.15 nm. The twin character of the emitted photons is ascertained through a time-correlation measurement. This work opens a route towards new guided-wave semiconductor quantum devices.
We report on an integrated source of twin photons at telecom wavelength operating at room temperature, in which a pump beam impinging on top of an AlGaAs waveguide generates two counterpropagating, orthogonally polarized guided modes by parametric fluorescence. This scheme allows an unprecedented flexibility in controlling the quantum properties of the emitted photons, by a simple shaping of the spatial and spectral profiles of the pump. The source versatility permits us to tailor the degree of frequency correlation and the spectrum of the emitted photons.
We experimentally demonstrate a counterpropagating twin photons source consisting of an AlGaAs multilayer waveguide. In our geometry, a pump beam impinging on top of a waveguide generates parametrically two counter propagating, orthogonally polarized signal/idler guided modes through a type II nonlinear interaction. Two phase-matched processes occur simultaneously in our scheme: in the first one, the photon copropagating with the z component of the pump beam is TM polarized and the counter propagating one is TE polarized. In the second one, the vice versa occurs. The most attractive application of this device is a narrow-bandwidth fibered source of entangled photon pairs, where signal and idler photons are collected at the opposite waveguide facets with low coupling losses.
We have designed and fabricated a set of AlGaAs multilayer waveguides, which can serve as a source of entangled photons at 1.55μm through parametric fluorescence. In our scheme two counterpropagating, orthogonally polarized signal/idler modes are nonlinearly generated by a pump wave impinging on the upper surface of the waveguide. To check the compliance with design specifications on phase-matching wavelength and parametric gain, we have systematically measured effective indices and surface-emitting second-harmonic generation, respectively. This characterization allowed us to single out a nominal sample with optimum performances, which we numerically modeled for counterpropagating parametric fluorescence. We predict a pair generation efficiency ηPF=4×10−13 (signal photons per pump photon). For a 1W (peak), 100ns pump pulse at normal incidence, this corresponds to about 14 photons per dark count with state-of-the-art avalanche photodiodes.
We demonstrate an integrated semiconductor ridge microcavity source of counterpropagating twin photons at room temperature in the telecom range. Based on type II parametric down conversion in a counterpropagating phase matching scheme with transverse pump, the device generates around 10-11 pairs/pump photons having a 0.3 nm bandwidth for a 1 mm long waveguide. The emission spectrum shows the existence of two equally probable processes, which is a preliminary step to the direct generation of Bell states. The twin character of the photons of each pair is demonstrated via a temporal correlation measurement. These results open the way to the demonstration of several interesting features associated to the counterpropagating geometry, such as the control of the frequency correlation degree via the spatial and spectral properties of the pump beam.
We experimentally demonstrate an integrated semiconductor ridge microcavity source of counterpropagating twin photons at room temperature in the telecom range. Based on type II parametric down conversion with a counterpropagating phase-matching, pump photons generate photon pairs with an efficiency of about 10(-11) and a spectral linewidth of 0.3 nm for a 1 mm long sample. The indistiguishability of the photons of the pair is measured via a Hong-Ou-Mandel two-photon interference experiment showing a visibility of 85 %. This work opens a route towards new guided-wave semiconductor quantum devices.