Estimating the dielectric parameters of water and gel using reflectance and transmission at 1.85 to 2.07 THz

Zoltan Vilagosh; Negin Foroughimehr; Alireza Lajevardipour; Dominique Appadoo; Saulius Juodkazis; Andrew Wood

doi:10.1117/12.2615416

27 October 2021 Estimating the dielectric parameters of water and gel using reflectance and transmission at 1.85 to 2.07 THz

Zoltan Vilagosh, Negin Foroughimehr, Alireza Lajevardipour , Dominique Appadoo, Saulius Juodkazis, Andrew Wood

Author Affiliations +

Proceedings Volume 11925, Biomedical Imaging and Sensing Conference 2021; 119250B (2021) https://doi.org/10.1117/12.2615416
Event: SPIE Technologies and Applications of Structured Light, 2021, Online, Japan

Abstract

The THz/Far-IR Beamline at the Australian Synchrotron was used to demonstrate a novel method of estimating the dielectric properties of water based substances in the 2.0 THz region. The method involves using an ATR apparatus with a diamond crystal in a way that converts the apparatus to a reflection/transmission mode by using a mirror at a set distance from the crystal/sample interface to reflect the transmitted portion of the incoming beam back to the detector. The method can extract the full dielectric properties of a sample. The method is only limited by the frequency range of the source and the sensitivity range of the detector. It is best suited to studies at 2.0 THz and above with a diamond crystal ATR apparatus, since the combination of the refractive index of diamond (n=2.40) and water (n=1.95 at 2.0 THz) are in the optimal ratio to produce excellent contrast. Water and water based gel were used to demonstrate the technique.

Citation Download Citation

Zoltan Vilagosh, Negin Foroughimehr, Alireza Lajevardipour , Dominique Appadoo, Saulius Juodkazis, and Andrew Wood "Estimating the dielectric parameters of water and gel using reflectance and transmission at 1.85 to 2.07 THz", Proc. SPIE 11925, Biomedical Imaging and Sensing Conference 2021, 119250B (27 October 2021); https://doi.org/10.1117/12.2615416

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available