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pro vyhledávání: '"Allen, Kenneth W."'
The dielectric layers surrounding a metasurface have a large impact on its frequency and angular response. The notion of effective permittivity captures this dependence by suggesting that a layered dielectric environment will perturb metasurface reso
Externí odkaz:
http://arxiv.org/abs/2410.17981
In this work, a planar phased array antenna was engineered with ultra-wideband (UWB) performance that covers portions of the L-, S-, and C-bands. The unit cell design contains a driven layer that is directly connected to a single coaxial feed and a p
Externí odkaz:
http://hdl.handle.net/10150/626945
http://arizona.openrepository.com/arizona/handle/10150/626945
http://arizona.openrepository.com/arizona/handle/10150/626945
Autor:
Bidney, Grant W., Duran, Joshua M., Ariyawansa, Gamini, Anisimov, Igor, Allen, Kenneth W., Astratov, Vasily N.
Light-concentrating truncated Si micropyramidal arrays with 54.7 degree sidewall angles were successfully integrated with PtSi Schottky barrier photodetectors. Four different devices consisting of 10 x 10 photodetectors with 60 um pitch combined in p
Externí odkaz:
http://arxiv.org/abs/2309.15077
Autor:
Bidney, Grant W., Jean, Amstrong R., Duran, Joshua M., Ariyawansa, Gamini, Anisimov, Igor, Allen, Kenneth W., Astratov, Vasily N.
This research was devoted to modeling of the optical properties of Si micropyramids aimed at designing optimal structures for applications as light concentrators in mid-wave infrared (MWIR) focal place arrays (FPAs). It is shown that completely diffe
Externí odkaz:
http://arxiv.org/abs/2309.15073
Autor:
Allen, Kenneth W., Kovitz, Joshua M.
Publikováno v:
Georgia Tech Research Institute IRAD Journal; June 30, 2018
Developing reconfigurable millimeter-wave (mmWave) antennas and devices is an outstanding challenge, with switch technologies being a primary impediment. Recently, it has been shown that vanadium dioxide (VO2), a thermochromic material whose resistan
Externí odkaz:
http://arxiv.org/abs/1906.03034
Akademický článek
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Autor:
Li, Yangcheng, Abolmaali, Farzaneh, Allen, Kenneth W., Limberopoulos, Nicholaos I., Urbas, Augustine, Rakovich, Yury, Maslov, Alexey V., Astratov, Vasily N.
This work takes inspiration from chemistry where the spectral characteristics of the molecules are determined by hybridization of electronic states evolving from the individual atomic orbitals. Based on analogy between quantum mechanics and the class
Externí odkaz:
http://arxiv.org/abs/1703.01399
Publikováno v:
In IFAC PapersOnLine 2022 55(37):139-144
Autor:
Astratov, Vasily N., Abolmaali, Farzaneh, Brettin, Aaron, Allen, Kenneth W., Maslov, Alexey V., Limberopoulos, Nicholaos I., Walker Jr., Dennis E., Urbas, Augustine M.
Despite all the success with developing super-resolution imaging techniques, the Abbe limit poses a severe fundamental restriction on the resolution of far-field imaging systems based on diffraction of light. Imaging with contact microlenses, such as
Externí odkaz:
http://arxiv.org/abs/1606.05145
Autor:
Allen, Kenneth W., Scott, Mark M.
We present an X-band waveguide (WR90) and UHF waveguide (WR1500) measurement method that permits the extraction of the complex permittivity for low dielectric loss tangent material specimen. The extraction method relies on computational electromagnet
Externí odkaz:
http://arxiv.org/abs/1604.06115