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Terahertz Beam Splitting Lens for Efficient LO Coupling to a 7-pixel 1.9 THz Heterodyne Array

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dc.contributor.authorLi, M.S.
dc.contributor.authorVan Berkel, S.
dc.contributor.authorStake, J.
dc.contributor.authorChattopadhyay, G.
dc.contributor.authorWithayachumnankul, W.
dc.contributor.conferenceInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz (1 Sep 2024 - 6 Sep 2024 : Perth, Western Australia)
dc.date.issued2024
dc.description.abstractTerahertz heterodyne arrays are promising spectroscopic instruments for submillimeter-wave astronomy applications. High-frequency multi-pixel heterodyning detection necessitates a local oscillator (LO) signal distributed and fed via free space by using a silicon lens array. However, limitations exist in the coupling of LO power emitted from a horn antenna. In this paper, we propose a free-form silicon lens for converting the input LO signal with a quasi-Gaussian profile into 7 beams with equal power for efficient coupling with the heterodyne array at 1.95 THz. The phase profile of this lens is calculated using a modified Gerchberg-Saxton (GS) algorithm. Analytical and full-wave simulations suggest that field coupling can be significantly improved, potentially reaching around 90%.
dc.description.statementofresponsibilityMingxiang Stephen Li, Sven van Berkel, Jan Stake, Goutam Chattopadhyay, and Withawat Withayachumnankul
dc.identifier.citationInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, 2024, pp.1-2
dc.identifier.doi10.1109/IRMMW-THz60956.2024.10697622
dc.identifier.isbn979-8-3503-7033-1
dc.identifier.issn2162-2027
dc.identifier.issn2162-2035
dc.identifier.orcidLi, M.S. [0000-0001-9862-7845]
dc.identifier.orcidWithayachumnankul, W. [0000-0003-1155-567X]
dc.identifier.urihttps://hdl.handle.net/2440/143782
dc.language.isoen
dc.publisherIEEE
dc.relation.granthttp://purl.org/au-research/grants/arc/DP220100489
dc.relation.ispartofseriesInternational Conference on Infrared Millimeter and Terahertz Waves
dc.rights©2024 IEEE
dc.source.urihttps://doi.org/10.1109/irmmw-thz60956.2024.10697622
dc.subjectTerahertz heterodyne arrays
dc.titleTerahertz Beam Splitting Lens for Efficient LO Coupling to a 7-pixel 1.9 THz Heterodyne Array
dc.typeConference paper
pubs.publication-statusPublished

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