Fabrication and study of terahertz lenses made of artificial opals
V.E. Ulitko1,*, G.M. Katyba1,2, G.A. Komandin2, I.E. Spector2, G.A. Emelchenko1, V.N. Kurlov1, V.M. Masalov1, K.I. Zaytsev2,3,4.
1 - Institute of Solid State Physics of RAS, Russia
2 - Prokhorov General Physics Institute of RAS, Russia
3 - Institute for Regenerative Medicine, Sechenov University, Russia
4 - Bauman Moscow State Technical University, Russia
*e-mail: ulitko.vl@gmail.com
Abstract
In our previous articles, it was shown [1,2], that opal-based nanostructures could be very promising terahertz (THz) optical materials with low radiation absorption level and tunable pulses dispersion by choosing refractive index in a wide range (1.6-1.95) only by heat treatment regimes. In this work, we fabricate two flat-concave cylindrical lenses by grinding. The lenses were fabricated from bulk opal pieces, annealed at different temperatures, which led to different optical properties of the material. Next, we study fabricated lenses using a homemade THz imaging setup. Experimental results were compared with theoretical considerations. Obtained results show that artificial opals have a great potential for THz applications.
This work was partially supported by the Russian Science Foundation (RSF), Project # 19-12-00402.
[1] Ulitko, V.E. et. al. Nanoporous SiO2 based on annealed artificial opals as a favorable material platform of terahertz optics, Optical Materials Express, 10(9), 2100, 2020.
DOI:10.1364/OME.402185;
[2] Ulitko, V.E. et. al. Opal-based terahertz optical elements fabricated by self-assembly of porous SiO2 nanoparticles, Optics Express 29(9), 13764, 2021.
DOI:10.1364/OE.422637.
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Speaker
Ulitko Vladislav
Institute of Solid State Physics Russian Academy of Sciences (ISSP RAS)
Russia
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