Terahertz sensing with meta-surfaces and integrated circuits

B. Reinhard; K. Schmitt; T. Fip; M. Volk; J. Neu; A.-K. Mahro; R. Beigang; M. Rahm

doi:10.1117/12.2010256

23 February 2013 Terahertz sensing with meta-surfaces and integrated circuits

B. Reinhard, K. Schmitt, T. Fip, M. Volk, J. Neu, A.-K. Mahro, R. Beigang, M. Rahm

Proceedings Volume 8585, Terahertz and Ultrashort Electromagnetic Pulses for Biomedical Applications; 858507 (2013) https://doi.org/10.1117/12.2010256
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Many applications of terahertz technology are concerned with sensing of substances such as drugs, chemical compounds, explosives and much more. For this purpose, low-cost terahertz measurement systems are desired. In this respect, metasurfaces can be used as sensitive near-field sensors by exploiting the change of resonant frequency in the vicinity of substances. We demonstrate chip-based terahertz sensors that can be applied to measure the thickness of ultra-thin materials with a resolution of the order of 1/16000 of the wavelength. Furthermore, we show that the same sensor can be used for refractometric measurements. In this context, we evaluated the refractive index of highly absorptive liquids and liquid mixtures. Based on these measurements, we retrieved the mixing ratio of the liquid mixtures. Moreover, we show that meta-surfaces can be employed to implement chip-based terahertz circuits for highly confined surface waves. The electromagnetic properties of the meta-surface can be designed on purpose. For example, such meta-surfaces can serve as integrated interferometric sensors and can be used for highly sensitive measurements when only a small amount of a sample material is available.

Citation Download Citation

B. Reinhard, K. Schmitt, T. Fip, M. Volk, J. Neu, A.-K. Mahro, R. Beigang, and M. Rahm "Terahertz sensing with meta-surfaces and integrated circuits", Proc. SPIE 8585, Terahertz and Ultrashort Electromagnetic Pulses for Biomedical Applications, 858507 (23 February 2013); https://doi.org/10.1117/12.2010256

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