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14THz-I-10
NONLINEAR AND TERAHERTS PHOTONICS
Technologies of Diffractive Optics for IR and THz Ranges
VPavelyev12, B. Knyazev3, M. Komlenok4, K. Tukmakov1, T. Kononenko4, A. Reshetnikov1, A. Agafonov1, Yu. Choporova3, N. Osintseva3, V. Konov4, V. Soifer1,2, G. Kulipanov3, N. Vinokurov3
1 - Samara National Research University, Moskovskoye Shosse 34, Samara, Russia, 443086 2 - IPSIRAS - Branch of the FSRC "Crystallography and Photonics" RAS, Molodogvardeyskaya 151, Samara, Russia, 443001 3 - Budker Institute of Nuclear Physics of SB RAS, Pr. Lavrentyeva 11, Novosibirsk, Russia, 630090 4 - Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova str. 38, 119991 Moscow, Russia
Technologies for silicon and diamond transmissive diffractive microoptics have been developed [1-6]. Silicon and diamond diffractive optical elements for focusing terahertz laser beam [1-3] as well for formation of terahertz laser beam with pre-given mode composition [4] and polarization state [5] have been fabricated and experimentally investigated. The experiments were carried out at a wavelength of 130-150 ^m using the Novosibirsk Free Electron Laser [6]. Developed technologies are based on lithographic etching [1,4,5] and laser ablation [2,3]. The application of antireflection coating and antireflection structures for decreasing Fresnel losses is considered [6]. Technology of laser ablation was used for fabrication of high-effective infrared (A=10.6 mm) diamond diffractive optics in before [7]. Besides, technology of micromilling was used for reflective terahertz free-form optics fabrication [8]. In the present talk the fabrication of photonics elements for far terahertz and millimeter ranges is considered. The perspectives of 3D printing application [9] as well as micromilling for fabrication of diffractive optics of submillimeter and millimeter ranges are considered.
The experiments were carried out at the Novosibirsk Free Electron Laser Facility, which is part of "the Siberian Synchrotron and Terahertz Radiation Center".
This work was supported by the Russian Science Foundation grant 19-72-20202.
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