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Development of experimental set-up for the investigation of photoelectric response of the pyroelectric crystal to short pulses of the Hg(Xe) lamp

V. PODGURSKY1,* , R. LAND2, A. BOGATOV2, A. VLASOV3, A. NAGORNY3, K. TIIK3

Affiliation

  1. Tallinn University of Technology, School of Engineering, Department of Mechanical and Industrial Engineering, Ehitajate tee 5, 19086 Tallinn, Estonia
  2. Tallinn University of Technology, School of Information Technologies, Thomas Johann Seebeck Department of Electronics, Ehitajate tee 5, 19086 Tallinn, Estonia
  3. Efenco OÜ, Ranna 3d, 40231 Sillamäe, Estonia

Abstract

The experimental set-up was developed for the measurement of the photoelectric response of a LiTaO3 crystal under illumination of a Hg(Xe) lamp. The set-up includes a vacuum chamber with sample stage and the Hg(Xe) lamp with a light shutter and optical feedthrough to chamber. The LiTaO3 crystal was simultaneously heated by a resistive heating element and irradiated with the Hg(Xe) lamp with a pulse duration/delay time of 10/10 sec, respectively. To increase radiation absorption, a radiation-reflecting molybdenum layer was deposited on the side opposite the irradiated surface of the crystal. Fast photoelectric response of the LiTaO3 crystal and the increase of the photocurrent about five times was found for coated sample in comparison with uncoated one..

Keywords

LiTaO3, Photoelectric effect, Optical modulation, Hg(Xe) lamp, Molybdenum reflector.

Submitted at: Dec. 11, 2023
Accepted at: June 3, 2024

Citation

V. PODGURSKY, R. LAND, A. BOGATOV, A. VLASOV, A. NAGORNY, K. TIIK, Development of experimental set-up for the investigation of photoelectric response of the pyroelectric crystal to short pulses of the Hg(Xe) lamp, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 5-6, pp. 243-245 (2024)