TY - JOUR

T1 - Comparative Study of Single Crystal and Polymeric Pyroelectric Detectors in the 0.9-2.0 THz Range Using Monochromatic Laser Radiation of the NovoFEL

AU - Melnikov, Anatoly R

AU - Kalneus, Evgeny V

AU - Getmanov, Yaroslav V

AU - Shevchenko, Darya A

AU - Gerasimov, Vasily V

AU - Anisimov, Oleg A

AU - Fedin, Matvey V

AU - Veber, Sergey L

N1 - This work was funded by the Russian Science Foundation, grant number 23-73-00042.

PY - 2023/10/18

Y1 - 2023/10/18

N2 - The development of efficient and reliable sensors operating at room temperature is essential to advance the application of terahertz (THz) science and technology. Pyroelectric THz detectors are among the best candidates, taking into account their variety, outstanding performance, ease of fabrication, and robustness. In this work, we compare the performance of six different detectors, based on either LaTiO3 crystal or different polymeric films, using monochromatic radiation of the Novosibirsk Free Electron Laser facility (NovoFEL) in the frequency range of 0.9-2.0 THz. The main characteristics, including noise equivalent power and frequency response, were determined for all of them. Possible reasons for the differences in the obtained characteristics are discussed on the basis of the main physicochemical characteristics and optical properties of the sensitive area. At least three detectors showed sufficient sensitivity to monitor the shape and duration of the THz macropulses utilizing only a small fraction of the THz radiation from the primary beam. This capability is crucial for accurate characterization of THz radiation during the main experiment at various specialized endstations at synchrotrons and free electron lasers. As an example of such characterization, the typical stability of the average NovoFEL radiation power at the beamline of the electron paramagnetic resonance endstation was investigated.

AB - The development of efficient and reliable sensors operating at room temperature is essential to advance the application of terahertz (THz) science and technology. Pyroelectric THz detectors are among the best candidates, taking into account their variety, outstanding performance, ease of fabrication, and robustness. In this work, we compare the performance of six different detectors, based on either LaTiO3 crystal or different polymeric films, using monochromatic radiation of the Novosibirsk Free Electron Laser facility (NovoFEL) in the frequency range of 0.9-2.0 THz. The main characteristics, including noise equivalent power and frequency response, were determined for all of them. Possible reasons for the differences in the obtained characteristics are discussed on the basis of the main physicochemical characteristics and optical properties of the sensitive area. At least three detectors showed sufficient sensitivity to monitor the shape and duration of the THz macropulses utilizing only a small fraction of the THz radiation from the primary beam. This capability is crucial for accurate characterization of THz radiation during the main experiment at various specialized endstations at synchrotrons and free electron lasers. As an example of such characterization, the typical stability of the average NovoFEL radiation power at the beamline of the electron paramagnetic resonance endstation was investigated.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85175343940&origin=inward&txGid=cd6cf683c0ffd8c4a878ec15edddb5a3

U2 - 10.3390/polym15204124

DO - 10.3390/polym15204124

M3 - Article

C2 - 37896368

VL - 15

JO - Polymers

JF - Polymers

SN - 2073-4360

IS - 20

M1 - 4124

ER -