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Guest-responsive polaritons in a porous framework: chromophoric sponges in optical QED cavities

Haldar, Ritesh 1; Fu, Zhihua 1; Joseph, Reetu ORCID iD icon 2; Herrero, David; Martín-Gomis, Luis; Richards, Bryce S. ORCID iD icon 2,3; Howard, Ian. A. 2,3; Sastre-Santos, Angela; Wöll, Christof 1
1 Institut für Funktionelle Grenzflächen (IFG), Karlsruher Institut für Technologie (KIT)
2 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)
3 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)


Introducing porous material into optical cavities is a critical step toward the utilization of quantum-electrodynamical (QED) effects for advanced technologies, e.g. in the context of sensing. We demonstrate that crystalline, porous metal–organic frameworks (MOFs) are well suited for the fabrication of optical cavities. In going beyond functionalities offered by other materials, they allow for the reversible loading and release of guest species into and out of optical resonators. For an all-metal mirror-based Fabry–Perot cavity we yield strong coupling (∼21% Rabi splitting). This value is remarkably large, considering that the high porosity of the framework reduces the density of optically active moieties relative to the corresponding bulk structure by ∼60%. Such a strong response of a porous chromophoric scaffold could only be realized by employing silicon-phthalocyanine (SiPc) dyes designed to undergo strong J-aggregation when assembled into a MOF. Integration of the SiPc MOF as active component into the optical microcavity was realized by employing a layer-by-layer method. The new functionality opens up the possibility to reversibly and continuously tune QED devices and to use them as optical sensors.

Verlagsausgabe §
DOI: 10.5445/IR/1000124234
DOI: 10.1039/d0sc02436h
Zitationen: 16
Zitationen: 17
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Funktionelle Grenzflächen (IFG)
Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2041-6520, 2041-6539
KITopen-ID: 1000124234
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in Chemical science
Verlag Royal Society of Chemistry (RSC)
Band 11
Heft 30
Seiten 7972–7978
Nachgewiesen in Web of Science
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