Creating a near-perfect circularly polarized terahertz beam through the nonreciprocity of a magnetoplasma

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dc.citation.firstpage38540
dc.citation.issueNumber23
dc.citation.journalTitleOptics Express
dc.citation.lastpage38549
dc.citation.volumeNumber31
dc.contributor.authorJu, Xuewei
dc.contributor.authorHu, Zhiqiang
dc.contributor.authorZhu, Guofeng
dc.contributor.authorHuang, Feng
dc.contributor.authorChen, Yanqing
dc.contributor.authorGuo, Cuixia
dc.contributor.authorBelyanin, Alexey
dc.contributor.authorKono, Junichiro
dc.contributor.authorWang, Xiangfeng
dc.date.accessioned2024-05-03T15:51:13Z
dc.date.available2024-05-03T15:51:13Z
dc.date.issued2023
dc.description.abstractCompared to other parts of the electromagnetic spectrum, the terahertz frequency range lacks efficient polarization manipulation techniques, which is impeding the proliferation of terahertz technology. In this work, we demonstrate a tunable and broadband linear-to-circular polarization converter based on an InSb plate containing a free-carrier magnetoplasma. In a wide spectral region (∼ 0.45 THz), the magnetoplasma selectively absorbs one circularly polarized mode due to electron cyclotron resonance and also reflects it at the edges of the absorption band. Both effects are nonreciprocal and contribute to form a near-zero transmission band with a high isolation of –36 dB, resulting in the output of a near-perfect circularly polarized terahertz wave for an incident linearly polarized beam. The near-zero transmission band is tunable with magnetic field to cover a wide frequency range from 0.3 to 4.8 THz.
dc.identifier.citationJu, X., Hu, Z., Zhu, G., Huang, F., Chen, Y., Guo, C., Belyanin, A., Kono, J., & Wang, X. (2023). Creating a near-perfect circularly polarized terahertz beam through the nonreciprocity of a magnetoplasma. Optics Express, 31(23), 38540–38549. https://doi.org/10.1364/OE.500889
dc.identifier.digitaloe-31-23-38540
dc.identifier.doihttps://doi.org/10.1364/OE.500889
dc.identifier.urihttps://hdl.handle.net/1911/115572
dc.language.isoeng
dc.publisherOptica Publishing Group
dc.rightsPublished under the terms of the Optica Open Access Publishing Agreement
dc.rights.urihttps://opg.optica.org/library/license_v2.cfm#VOR-OA
dc.titleCreating a near-perfect circularly polarized terahertz beam through the nonreciprocity of a magnetoplasma
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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