Terahertz axicon fabricated by direct sedimentation of SiO2 colloidal nanoparticles in a mold

V. E. Ulitko; V. N. Kurlov; V. M. Masalov; I. N. Dolganova; N. V. Chernomyrdin; K. I. Zaytsev; G. M. Katyba

doi:10.1117/12.2593600

1 August 2021 Novel method of fabrication of terahertz optical components made of nanoporous SiO₂ colloidal nanoparticles in a mold

V. E. Ulitko, V. N. Kurlov, V. M. Masalov, I. N. Dolganova, N. V. Chernomyrdin, K. I. Zaytsev, G. M. Katyba

Author Affiliations +

Proceedings Volume 11827, Terahertz Emitters, Receivers, and Applications XII; 118270M (2021) https://doi.org/10.1117/12.2593600
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

We study a new method in fabrication of THz optical components from previously studied porous three-dimensional nanostructures based on SiO2 [Optical Materials Express 10, 2100-2113 (2020)]. Porous SiO2 is represented by artificial opals [Optical Materials 49, 208–212 (2015)]. By the thermal treatment, it is able to achieve materials with different stoichiometric composition and porosity, and obtaining pre-determined physical and optical properties of thematerial. In this paper we produced the THz conical lens (axicone) by direct sedimentation of aqueous colloidal suspension of the SiO2 nanoparticles onto a shaped mold, followed by annealing and finished machining. The THz field transformation behind the axicone was studied by THz imaging system. The observed results were then compared with numerical predictions obtained by using the methods of computational electrodynamics. Finally, we discuss the potential of the described fabrication method in the THz optics.

Conference Presentation

Citation Download Citation

V. E. Ulitko, V. N. Kurlov, V. M. Masalov, I. N. Dolganova, N. V. Chernomyrdin, K. I. Zaytsev, and G. M. Katyba "Novel method of fabrication of terahertz optical components made of nanoporous SiO₂ colloidal nanoparticles in a mold", Proc. SPIE 11827, Terahertz Emitters, Receivers, and Applications XII, 118270M (1 August 2021); https://doi.org/10.1117/12.2593600

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