Browsing by Author "2bf71c95-0f3b-4155-b64f-ae15d38300a3"

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On Self-Oscillating Wireless Power Transfer

Tretyakov, Sergei; Ra’di, Younes; Simovski, Constantin; Valagiannopoulos, Constantinos (IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), 2017-11-13)

Abstract—Conventional wireless power transfer systems consist of a microwave power generator located at one place and a microwave power receiver located at a distance. To realize efficient power transfer, the system ...
“Unlocking” the Ground: Increasing the Detectability of Buried Objects by Depositing Passive Superstrates

Valagiannopoulos, Constantinos (2016)

One of the main problems when trying to detect the position and other characteristics of a small inclusion into lossy earth via external measurements is the inclusion’s poor scattering response due to attenuation. Hence, ...
Wide-angle absorption of visible light from simple bilayers

PAPADIMOPOULOS, ATHANASIOS N.; KANTARTZIS, NIKOLAOS V.; TSITSAS, NIKOLAOS L.; Valagiannopoulos, Constantinos (Optical Society of America, 2017-12-08)

Color-selective absorption of light is a very significant operation used in numerous applications, from photonic sensing and switching to optical signal modulation and energy harnessing. We demonstrate angle-insensitive ...