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Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)

Semiconductor-superconductor photon beli-state analyzer

Evyatar Sabag, Shlomi Bouscher, Raja Marjieh, Alex Hayat

Published Jun 1, 2017• 0 citations
Publisher

Abstract

Here we propose a new efficient method to preform full Bell-state analysis based on photon-pair detection in a semiconductor quantum-well (QW) based structure in proximity to a superconductor. We show that for certain photon energies one-photon absorption is forbidden, and only two-photon absorption into Cooper-pairs can occur (Fig. 1.a), with rates enhanced by orders of magnitude compared to other nonlinear processes. Putting the device in proximity to a superconductor allows light-matter interactions only with a specific entangled photon-pair [6], due to the spin-entangled states in BCS. We theoretically demonstrate Bell-state analysis on polarization entangled photons tagged by different energies.

DOI
10.1109/cleoe-eqec.2017.8087434

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Various applications in the rapidly growing field of quantum information science require reliable and effective quantum light sources. We proposed an efficient approach for generation of entangled photons, based on Cooper-pair luminescence in semiconductors, which does not require isolated emitters. Semiconductor quantum wells, remove the light-heavy-hole degeneracy, allowing efficient photon entanglement generation in simple electrically-driven structures, taking advantage of the superconducting macroscopic coherence [1]. We analyzed a new effect of enhanced light amplification in electrically-driven semiconductor-superconductor structures, including Cooper-pair based two-photon gain [2]. We also proposed a compact and highly-efficient scheme for a complete Bell-state analysis using two-photon absorption in a superconducting proximity region of a semiconductor avalanche photodiode [3]. This Cooper-pair based two-photon absorption results in a strong detection preference of a specified entangled state.
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