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2The 30th International Conference on Advanced Laser Technologies N-I-3
ALT'23
On the opportunity of THz radiation detection using fluoride
nanoparticles
V.V. Semashko12, G.S. Shakurov1, A.S. Nizamutdinov2, M.S. Pudovkin2, S.S. Kharintsev2, O.A. Morozov12, S.L. Korableva2, A.K. Dokudovskaja2, A.R. Gazizov2
1-Kazan E. K. Zavoisky Physical -Technical Institute (KPhTI), Sibirsky tract, 10/7, 420029 Kazan, Russia 2- Kazan Federal University, 18 Kremlyovskaya str., 420008 Kazan, Russia
Main author email address: ua4pcy@mail.ru
The development of physical principles for the designs of highly sensitive fast-response real-time detectors and visualizers of microwave and terahertz radiation is an urgent task [1]. Here the opportunity of implementing detectors and visualizers based on activated fluoride nanoparticles, which are efficient luminescent temperature sensors [2,3] is discussed.
Fluoride crystalline materials, having low values of heat capacity, thermal conductivity, and density [3, 4], allow to create composite nanoparticles of the "core-shell" type, where water clusters or metal inclusions can act as the core, providing efficient conversion of terahertz radiation into heat, followed by heating of the luminescent shells. It is proposed to use the dependence of the spectral-luminescent properties of nanoparticles on temperature. The features of the synthesis of rare earth ions doped fluoride nanoparticles of various compositions and morphology are presented, their absorption and fluorescent spectral-kinetic characteristics in THz and optical spectral and temperature ranges in which their maximum temperature sensitivity is realized are discussed. The detection thresholds for terahertz radiation and the inertial properties of temperature sensors based on fluoride nanoparticles are evaluated. A further prospects of nanosensoric are discussed.
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