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Open-Cavity in Closed-Cycle Cryostat as a Quantum Optics Platform

Vadia, Samarth; Scherzer, Johannes; Thierschmann, Holger; Schäfermeier, Clemens; Dal Savio, Claudio; Taniguchi, Takashi; Watanabe, Kenji; Hunger, David; Karraï, Khaled; Högele, Alexander

The introduction of an optical resonator can enable efficient and precise interaction between a photon and a solid-state emitter. It facilitates the study of strong light-matter interaction, polaritonic physics and presents a powerful interface for quantum communication and computing. A pivotal aspect in the progress of light-matter interaction with solid-state systems is the challenge of combining the requirements of cryogenic temperature and high mechanical stability against vibrations while maintaining sufficient degrees of freedom for in situ tunability. Here, we present a fiber-based open Fabry-Pérot cavity in a closed-cycle cryostat exhibiting ultrahigh mechanical stability while providing wide-range tunability in all three spatial directions. We characterize the setup and demonstrate the operation with the root-mean-square cavitylength fluctuation of less than 90 pm at temperature of 6.5 K and integration bandwidth of 100 kHz. Finally, we benchmark the cavity performance by demonstrating the strong-coupling formation of exciton polaritons in monolayer WSe2 with a cooperativity of 1.6. This set of results manifests the open cavity in a closed-cycle cryostat as a versatile and powerful platform for low-temperature cavity QED experiments.

Verlagsausgabe §
DOI: 10.5445/IR/1000139460
Veröffentlicht am 28.10.2021
DOI: 10.1103/PRXQuantum.2.040318
Cover der Publikation
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Institut für Quantenmaterialien und -technologien (IQMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 27.10.2021
Sprache Englisch
Identifikator ISSN: 2691-3399
KITopen-ID: 1000139460
Erschienen in PRX quantum
Verlag American Physical Society (APS)
Band 2
Heft 4
Seiten Art.-Nr.: 040318
Projektinformation Q.Link.X (BMBF, BUND HTS, 16KIS0879)
SQUARE (EU, H2020, 820391)
Vorab online veröffentlicht am 26.10.2021
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