Experimental exploration of longitudinal modes in spherical shells at 220 GHz - 330 GHz: Applications to corneal sensing

Faezeh Zarrinkhat, Joel Lamberg, Mariangela Baggio, Aleksi Tamminen, Juha Ala-Laurinaho, Elsayed E.M. Khaled, Juan Manuel Rius, Jordi Romeu Robert, Zachary Taylor

Research output: Contribution to conferenceAbstractScientificpeer-review

3 Citations (Scopus)

Abstract

Submillimeter-wave and THz sensing of cornea leverage the layered tissue structure for assessments of corneal water content and thickness. The cornea is bounded by air on the anterior and an optically thick body of water on the posterior and thus presents as a lossy thin film lying atop a lossy termination. Resolution of the cornea's lossy longitudinal modes via frequency domain reflectometry in a band sufficiently low (e.g. 220 GHz - 330 GHz) for significant penetration allows simultaneous estimates of corneal tissue water content (CTWC) and central corneal thickness (CCT). However, since the cornea is spherical, efficient coupling to longitudinal modes requires normal incidence across the interrogated area and thus a converging spherical phase front whose curvature matches the corneal surface curvature [1], [2].

Original languageEnglish
DOIs
Publication statusPublished - Jun 2021
MoE publication typeNot Eligible
EventEuropean Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference - Munich, Germany
Duration: 21 Jun 202125 Jun 2021

Conference

ConferenceEuropean Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference
Abbreviated titleCLEO/Europe-EQEC
Country/TerritoryGermany
CityMunich
Period21/06/202125/06/2021

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