All-dielectric metalens based on a single colloidal particle for photoconductive optical-to-terahertz switches
https://doi.org/10.32362/2500-316X-2020-8-6-78-86
About the Authors
I. A. Glinskiy
MIREA – Russian Technological University
Russian Federation
Russian Federation
Igor A. Glinskiy, Leading Engineer, IT Solutions Development Department, Mobile Solutions Engineering Center, Assistant Department of Nanoelectronics, Institute of Physics and Technology MIREA – Russian Technological University
78, Vernadskogo pr., Moscow, 119454
ResearcherID: I-4334-2015, Scopus Author ID: 57190616854
N. V. Zenchenko
MIREA – Russian Technological University
Russian Federation
Russian Federation
Nikolay V. Zenchenko, Leading Engineer, IT Solutions Development Department, Mobile Solutions Engineering Center, Assistant Department of Nanoelectronics, Institute of Physics and Technology MIREA – Russian Technological University
78, Vernadskogo pr., Moscow, 119454
ResearcherID: K-2233-2015, Scopus Author ID: 56891470400
D. S. Ponomarev
Institute of Ultra High Frequency Semiconductor Electronics of RAS
Russian Federation
Russian Federation
Dmitry S. Ponomarev, Ph.D. is Physics and Math, Deputy Director, Chief Researcher at V.G. Mokerov Institute of Ultra High Frequency Semiconductor Electronics of Russian Academy of Sciences (IUHFSE RAS)
Nagorny proezd, 7/5, Moscow, 117105
ResearcherID: K-1632-2014, Scopus Author ID: 37124831400
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1. Optical-to-terahertz switch with metalens based on a single dielectric microparticle | |
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We theoretically study the focusing of laser pump pulse by a single dielectric microparticle placed onto the gap between the electrodes of an optical-to-terahertz (THz) switches (OTS). To reduce the Fresnel losses due to reflection of the pump pulse from the surface of the photoconductor, we additionally use an antireflection coating layer – aluminum oxide. We use a semi-insulating gallium arsenide as a photoconductor. It is shown that the optimization of the microparticle diameter and thickness of an aluminum oxide layer makes it is possible to achieve the most efficient transmission of the laser pump pulse into the photoconductor with an increased amplitude of spatial radiation localization. The obtained results indicate advantages of such dielectric metasurfaces in the designing of OTS. Moreover, the proposed design of a metalens based on a single dielectric microparticle can become a promising method for increasing the efficiency of OTS.
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For citations:
Glinskiy I.A., Zenchenko N.V., Ponomarev D.S. All-dielectric metalens based on a single colloidal particle for photoconductive optical-to-terahertz switches. Russian Technological Journal. 2020;8(6):78-86. (In Russ.) https://doi.org/10.32362/2500-316X-2020-8-6-78-86
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