1-to-N terahertz integrated switches enabling multi-beam antennas

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dc.contributor.authorDechwechprasit, P.
dc.contributor.authorLees, H.
dc.contributor.authorHeadland, D.
dc.contributor.authorFumeaux, C.
dc.contributor.authorWithayachumnankul, W.
dc.date.issued2023
dc.description.abstractImplementing terahertz circuits and system designs relies on integrating reconfigurable devices such as switches, to fulfill a critical role in controlling and manipulating the flow of terahertz signals on the chip. Although there have been several demonstrations of on–off switching in the terahertz range, there have been no demonstrations of 1-to-𝑁 switching, to our knowledge. This pronounced lack of dynamically reconfigurable routing has severely limited the achievable complexity of terahertz systems. To address this, we propose 1-to-𝑁 switches made of cascaded disk resonators integrated into a substrateless silicon waveguide platform. A single switch can be controlled via photoexcitation using a low-power 658-nm laser focused onto the disk resonator, turning off the resonance and inhibiting coupling into a crossing port. The measurement results demonstrate that the proposed switch has low insertion loss, which can be attributed to the inherently low dissipation of the platform. The proposed on–off switch achieves a maximum insertion loss of 1.2 dB, and the maximum extinction ratio of the switch is 16.1 dB with 1.5 GHz of bandwidth. Furthermore, a 1-to-3 switch is monolithically integrated together with a Luneburg lens in order to project each of its output ports to a different far-field direction and, thereby, translate the switching operation into a form of reconfigurable beam control for future applications.
dc.description.statementofresponsibilityPanisa Dechwechprasit, Harrison Lees, Daniel Headland, Christophe Fumeaux, and Withawat Withayachumnankul
dc.identifier.citationOptica, 2023; 10(11):1551-1558
dc.identifier.doi10.1364/optica.502034
dc.identifier.issn2334-2536
dc.identifier.issn2334-2536
dc.identifier.orcidDechwechprasit, P. [0000-0001-7349-9031]
dc.identifier.orcidLees, H. [0000-0002-1741-175X]
dc.identifier.orcidHeadland, D. [0000-0003-1527-180X]
dc.identifier.orcidFumeaux, C. [0000-0001-6831-7213]
dc.identifier.orcidWithayachumnankul, W. [0000-0003-1155-567X]
dc.identifier.urihttps://hdl.handle.net/2440/141749
dc.language.isoen
dc.publisherOptica Publishing Group
dc.relation.granthttp://purl.org/au-research/grants/arc/DP220100489
dc.rights© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement. Open access journal article PDFs may be governed by the Optica Publishing Group Open Access Publishing Agreement signed by the author and any applicable copyright laws. Authors and readers may use, reuse, and build upon the article, or use it for text or data mining without asking prior permission from the publisher or the Author(s), as long as the purpose is non-commercial and appropriate attribution is maintained.
dc.source.urihttp://dx.doi.org/10.1364/optica.502034
dc.subjectterahertz; waveguide
dc.title1-to-N terahertz integrated switches enabling multi-beam antennas
dc.typeJournal article
pubs.publication-statusPublished

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