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On-chip optical quantum memory at telecom wavelengths (Conference Presentation)
Author(s): Ioana Craiciu; Jake Rochman; Mi Lei; Evan Miyazono; Jonathan M. Kindem; John Bartholomew; Tian Zhong; Andrei Faraon

Paper Abstract

Optical quantum memories will enable technologies including long distance quantum communication and modular quantum computing. Rare earth ion doped crystals provide an excellent solid state platform for optical quantum memories. Among rare earths, erbium is particularly appealing due to its long-lived telecom-wavelength resonance, allowing integration with silicon photonics and with existing optical communication technology and infrastructure. We present an on-chip all-optical quantum memory at telecom wavelengths using a nanobeam photonic crystal cavity fabricated directly in erbium-167 doped yttrium orthosilicate. Using an atomic frequency comb protocol, we store coherent pulses for memory times as long as 10 µs, albeit with low efficiency. For shorter memory times, we achieve a memory efficiency of 0.4%, which is limited by the coupling rate between the resonator and the ensemble of ions. By working at dilution refrigerator temperatures, we are able to access a regime where the ions have long optical coherence times and good spectral holeburning properties using only a moderate magnetic field applied with permanent magnets. We characterize the multimode properties and fidelity of the quantum memory in this device, and outline a path toward higher efficiency.

Paper Details

Date Published: 4 March 2019
Proc. SPIE 10933, Advances in Photonics of Quantum Computing, Memory, and Communication XII, 109330Q (4 March 2019); doi: 10.1117/12.2510217
Show Author Affiliations
Ioana Craiciu, Caltech (United States)
Jake Rochman, Caltech (United States)
Mi Lei, Caltech (United States)
Evan Miyazono, Caltech (United States)
Jonathan M. Kindem, Caltech (United States)
John Bartholomew, Caltech (United States)
Tian Zhong, Caltech (United States)
Andrei Faraon, Caltech (United States)

Published in SPIE Proceedings Vol. 10933:
Advances in Photonics of Quantum Computing, Memory, and Communication XII
Philip R. Hemmer; Alan L. Migdall; Zameer Ul Hasan, Editor(s)

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