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Q: Fachverband Quantenoptik und Photonik

Q 48: Poster – Quantum Optics, Technologies, and Optomechanics

Q 48.46: Poster

Wednesday, March 12, 2025, 17:00–19:00, Tent

Temporal-to-spatial mode demultiplexing of single photons for quantum information processing — •Fuad Raed Jubran Haddad^1,2,3, Xavi Barcons Planas^1,4, and Janik Wolters^1,2,3 — ¹Technische Universität Berlin — ²Deutsches Zentrum für Luft- und Raumfahrt — ³PTB — ⁴Humbodlt-Universität zu Berlin

Photonic quantum information processing needs the supply of many simultaneous input photons, separated into spatial modes. Single photon sources, such as SPDC sources or semiconductor quantum dots, typically produce time-separated photons in a single mode. By leveraging resonant electro-optic modulators (r-EOMs) to manipulate photon polarization, photons can be directed into optical paths of varying lengths [1]. This method enables the conversion of time-separated photons into spatially-separated photons, facilitating time-to-spatial demultiplexing, which is essential for interfacing with multimode photonic quantum processors. We report on our efforts to realize an efficient time-to-spatial demultiplexer for single photons, allowing to provide up to 8 photons simultaneously.

[1] C. Antón, et al., Optica 6, 1471-1477 (2019)

Keywords: Quantum optics; time-to-spatial Demultiplexing; Quantum Computing; Quantum information processing; single photons, SPDC