Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Felipe Beltran-Mejia"'
Publikováno v:
IEEE Transactions on Nanotechnology. 20:883-888
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65621518abae842c051445899df1f872
https://doi.org/10.1109/tnano.2021.3132308
https://doi.org/10.1109/tnano.2021.3132308
Autor:
J. R. Mejía-Salazar, Arismar Cerqueira Sodré Junior, Jéssica A. P. Ribeiro, Hugo Rodrigues Dias Filgueiras, Felipe Beltran-Mejia
Publikováno v:
Sensors, Vol 21, Iss 8014, p 8014 (2021)
Sensors (Basel, Switzerland)
Sensors (Basel, Switzerland)
We demonstrate a concept for a large enhancement of the directivity and gain of readily available cm- and mm-wave antennas, i.e., without altering any property of the antenna design. Our concept exploits the high reflectivity of a Bragg reflector com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de3585160359b9b09a11fdd38445364e
https://www.mdpi.com/1424-8220/21/23/8014
https://www.mdpi.com/1424-8220/21/23/8014
Autor:
Jan, Ornik, Jannik, Lehr, Marco, Reuter, David, Jahn, Felipe, Beltran-Mejia, Jan C, Balzer, Thomas, Kleine-Ostmann, Martin, Koch
Publikováno v:
Optics express. 28(19)
Recently, many research groups worldwide have reported on the THz properties of liquids. Often these parameters, i.e., refractive index and absorption coefficient, are determined using liquids in cuvettes and terahertz time-domain spectroscopy. Here,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::de8ad6c0328f55746c7183413364cf8c
https://pubmed.ncbi.nlm.nih.gov/32988094
https://pubmed.ncbi.nlm.nih.gov/32988094
Autor:
Felipe Beltran-Mejia, Thomas Kleine-Ostmann, D. Ulm, F. Ehrig, R. Guo, Eva-Maria Stuebling, Martin Koch
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 40:1-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b466abace34049da416f165f24e1b5c
https://doi.org/10.1007/s10762-018-0552-9
https://doi.org/10.1007/s10762-018-0552-9
Autor:
Martin Koch, Felipe Beltran-Mejia, M. Weidenbach, Jan C. Balzer, David Jahn, Leonard Becker, Jannik Lehr, Stefan F. Busch
Publikováno v:
Journal of Infrared, Millimeter, and Terahertz Waves. 38:708-716
We have designed, constructed and characterized a grating that focuses electromagnetic radiation at specific frequencies out of a dielectric waveguide. A simple theoretical model predicts the focusing behaviour of these chirped gratings, along with n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38a322cac8440b4c291878a323c9a8f5
https://doi.org/10.1007/s10762-017-0370-5
https://doi.org/10.1007/s10762-017-0370-5
Publikováno v:
2019 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
In this study, we present a tunable THz band pass filter design, using photo-excited low-loss slotted waveguide in a integrated CMOS compatible technology. The results show a tunable THz-filter capable of 48% of bandwidth dynamic range operation, in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8388b49da34632ce492eb8cea7a13710
https://doi.org/10.1109/sbfoton-iopc.2019.8910230
https://doi.org/10.1109/sbfoton-iopc.2019.8910230
Publikováno v:
2019 International Conference on Electromagnetics in Advanced Applications (ICEAA).
This paper presents experimental results obtained from the characterization of a mematerial Luneburg lens. Previously, a finite element numerical analysis was done in order to determine the compromise between the constitutive and the geometrical para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ac89691d805df0f01c87cb9b94f2b97
https://doi.org/10.1109/iceaa.2019.8878952
https://doi.org/10.1109/iceaa.2019.8878952
Publikováno v:
2019 International Conference on Electromagnetics in Advanced Applications (ICEAA).
Multilayered dielectric structures are able to almost completely reflect the electromagnetic radiation. We propose a configuration for these structures which offers directive radiation for a common rectangular patch antenna using Bragg mirrors featur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9427dbff7e047a8f057335b66f566832
https://doi.org/10.1109/iceaa.2019.8879134
https://doi.org/10.1109/iceaa.2019.8879134
Publikováno v:
2018 SBFoton International Optics and Photonics Conference (SBFoton IOPC).
This paper discusses the feasibility of electro-absorption modulator to operating at THz spectral region, using high losses materials and alloys that are usually applied for telecommunication engineering. Low loss structure based on slot waveguide is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93fe8bb18f67b725b10ba1310ae7c8ba
https://doi.org/10.1109/sbfoton-iopc.2018.8610919
https://doi.org/10.1109/sbfoton-iopc.2018.8610919
A mechanically tunable prism is constructed using a conventional 3D printer. First, by printing periodical layers of polystyrene, a dispersive element is obtained. Later, a tunable dispersive element is obtained by linking these layers with 3D printe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fd6dfacb05a18c789a423efb7f38ecd
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=85056853132
https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&origin=inward&scp=85056853132
