Vacuum Bloch–Siegert shift in Landau polaritons with ultra-high cooperativity

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dc.citation.firstpage324
dc.citation.journalTitleNature Photonics
dc.citation.lastpage329
dc.citation.volumeNumber12
dc.contributor.authorLi, Xinwei
dc.contributor.authorBamba, Motoaki
dc.contributor.authorZhang, Qi
dc.contributor.authorFallahi, Saeed
dc.contributor.authorGardner, Geoff C.
dc.contributor.authorGao, Weilu
dc.contributor.authorLou, Minhan
dc.contributor.authorYoshioka, Katsumasa
dc.contributor.authorManfra, Michael J.
dc.contributor.authorKono, Junichiro
dc.date.accessioned2018-06-29T16:54:54Z
dc.date.available2018-06-29T16:54:54Z
dc.date.issued2018
dc.description.abstractA two-level system resonantly interacting with an a.c. magnetic or electric field constitutes the physical basis of diverse phenomena and technologies. However, Schrödinger’s equation for this seemingly simple system can be solved exactly only under the rotating-wave approximation, which neglects the counter-rotating field component. When the a.c. field is sufficiently strong, this approximation fails, leading to a resonance-frequency shift known as the Bloch–Siegert shift. Here, we report the vacuum Bloch–Siegert shift, which is induced by the ultra-strong coupling of matter with the counter-rotating component of the vacuum fluctuation field in a cavity. Specifically, an ultra-high-mobility two-dimensional electron gas inside a high-Qterahertz cavity in a quantizing magnetic field revealed ultra-narrow Landau polaritons, which exhibited a vacuum Bloch–Siegert shift up to 40 GHz. This shift, clearly distinguishable from the photon-field self-interaction effect, represents a unique manifestation of a strong-field phenomenon without a strong field.
dc.identifier.citationLi, Xinwei, Bamba, Motoaki, Zhang, Qi, et al.. "Vacuum Bloch–Siegert shift in Landau polaritons with ultra-high cooperativity." <i>Nature Photonics,</i> 12, (2018) Springer Nature: 324-329. https://doi.org/10.1038/s41566-018-0153-0.
dc.identifier.doihttps://doi.org/10.1038/s41566-018-0153-0
dc.identifier.urihttps://hdl.handle.net/1911/102318
dc.language.isoeng
dc.publisherSpringer Nature
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Macmillan Publishers Limited, part of Springer Nature.
dc.titleVacuum Bloch–Siegert shift in Landau polaritons with ultra-high cooperativity
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpost-print
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