![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
ABSTRACT
In this paper, a new approach to effective detection of THz radiation is proposed using a configuration of thin metal and thin dielectric films; to this end, the design and performance of an effective composite absorber of THz radiation that can be used as the sensing element of a thermal detector are presented. A composite absorber consists of a set of two double-layered elements of a thin metal layer located on a dielectric material and is designed through a fine-tuning process. The results indicate that the proposed low-cost absorber can be widely tuned based on the metal layer sheet resistance and the thickness of various dielectric media. The development of a proper non-linear system of equations has as input the desired frequency and bandwidth of the absorbed THz radiation and output the required metrics of dielectric refractive index, the dielectric thickness and the metal’s sheet resistance that comprise the absorber.
Disclosure statement
No potential conflict of interest was reported by the author.
Additional information
Notes on contributors
Christos Bolakis
Dr. Christos Bolakis, Lieutenant Commander HN, graduated from the Hellenic Naval Academy as a Combat Officer in 2003. In 2010, he received his Master’s Degree in applied physics with concentration in sensors from the Naval Postgraduate School CA, USA. In 2017, he received his Ph.D. degree with concentration in the terahertz frequency region from the School of electrical and computer engineering of the National Technical University of Athens, Greece. He is a Lecturer at the Hellenic Naval Academy and author of the book “Electro – optical Systems. An introduction”. His research interest is mainly targeted to optimized coupling configurations in the terahertz and infrared spectrum.