Conference on Lasers and Electro-Optics

Bragg Reflection Waveguides: A Novel Platform for Enhanced Control of Photon-Pair Generation via Spontaneous Parametric Down Conversion

Payam Abolghasem, Xiaojuan Shi, Martin Hendrych, Juan P. Torres, Amr Saher Helmy

Published Jan 1, 2009• 0 citations

Abstract

Spontaneous–parametric down–conversion bandwidth control between 7 nm to 676 nm is reported in an integrated source of frequency anti–correlated photon–pairs using type–I and type–II phase–matched AlxGa1−xAs Bragg reflection waveguide.

DOI: 10.1364/iqec.2009.ithj3

Related papers

Bandwidth control of paired photons generated in monolithic Bragg reflection waveguides

Payam Abolghasem, Martin Hendrych, Xiaojuan Shi +2 more

Bragg reflection waveguides are considered as monolithic sources of frequency correlated photon pairs generated using spontaneous-parametric down-conversion in a AlxGa1-xAs material system. The source described here offers unprecedented control over the process bandwidth, enabling bandwidth tunability between 1 nm and 450 nm while using the same wafer structure. This tuning is achieved by exploiting the powerful control over the waveguide dispersion properties afforded by the phase-matching technique used. The offered technology provides a route for realizing electrically pumped, monolithic photon pair sources on a chip with versatile characteristics.

Optics LettersJun 26, 200947 citations

Bragg reflection waveguide as a source of wavelength-multiplexed polarization-entangled photon pairs

Jiŕí Svozilík, Martin Hendrych, Juan P. Torres

We put forward a new highly efficient source of paired photons entangled in polarization with an ultra-large bandwidth. The photons are generated by means of a conveniently designed spontaneous parametric down-conversion process in a semiconductor type-II Bragg reflection waveguide. The proposed scheme aims at being a key element of an integrated source of polarization-entangled photon pairs highly suitable for its use in a multi-user quantum-key-distribution system.

arXiv:1207.4218Optics ExpressJun 20, 201214 citations

AlGaAs Bragg Reflection Waveguides as Single and Entangled Photon Pair Source

Akriti Raj, Tobias Bauer, David Lindler +3 more

AlGaAs Bragg reflection waveguides are promising systems for the generation of single and entangled photons through the process of spontaneous parametric down-conversion (SPDC) [1]. We use a type II SPDC process where the downconverted photons are orthogonally polarized. The produced photons are inherently polarization-entangled eliminating the need for any additional entanglement setup. The material AlGaAs is our preferred choice as a nonlinear medium because it features a high nonlinear coefficient allowing for room temperature operation and has the advantage of being a non-birefringent material. Further, the material platform allows for the direct integration of a pump laser into the same chip.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)Jun 23, 20250 citations

Bragg reflection waveguides as integrated sources of entangled photon pairs

Sergei V. Zhukovsky, L. G. Helt, Payam Abolghasem +3 more

We explore the potential of versatile and efficient entangled photon pair generation by spontaneous parametric downconversion in Bragg reflection waveguides. By employing a quantum treatment of modes in channel waveguides, and by accounting for group velocity dispersion in the modes, the quantum state of the generated biphotons is realistically calculated. The pair production rate is predicted to reach 4×108 pairs/s/nm/mW of pump light in a 2 mm-long structure, on par with or exceeding the performance of previously reported designs. This is attributable to an enhanced nonlinear interaction through tight mode confinement in the waveguide. Strategies for device performance optimization and phase matching wavelength tunability are outlined and numerically demonstrated. The proposed design platform is versatile and allows photon pair generation with controllable flux, bandwidth, Schmidt number, and degree of polarization entanglement. The possibility of monolithic integration with a diode laser pump offers a way to design an electrically pumped entangled photon source.

Journal of the Optical Society of America BAug 28, 201223 citations

A Versatile, Single-Waveguide, Photon-Pair Source for Chip-Scale Quantum Communication

Jun Chen, Aaron J. Pearlman, Alexander Ling +2 more

We demonstrate a bright, bandwidth-engineerable, compact, quasi-phase-matched single-waveguide source generating photon pairs near 900 nm and 1300 nm. Coincidence spectra are measured for a periodically-poled KTiOPO4 waveguide for both type-0 and type-I spontaneous parametric down-conversion.

Conference on Lasers and Electro-OpticsJan 1, 20090 citations

Generation of polarization entangled photon pairs in Bragg reflection waveguides

Adam Vallés Marí

We report the observation of polarization entangled photon pairs generated by means of type-II spontaneous parametric down-conversion (SPDC) within an Al x Ga 1-x As Bragg reflection waveguide (BRW).Even though SPDC in BRW had been observed before, the photons detected were not entangled in the polarization degree of freedom.As a necessary previous step, we also characterized the phasematching properties of the waveguides designed by means of the nonlinear process of second-harmonic generation (SHG).

Sep 6, 20120 citations