TY - JOUR

T1 - Optimal Design of an Ultrasound Transducer for Efficient Acousto-Optic Modulation of Terahertz Radiation

AU - Nikitin, Pavel Alekseevich

AU - Gerasimov, Vasily Valerievich

N1 - Acknowledgments: The work was done at the shared research center SSTRC on the basis of the Novosibirsk FEL at BINP SB RAS with the use of equipment of the Shared Research Facilities of the Scientific and Technological Centre of Unique Instrumentation of the Russian Academy of Sciences (STC UI RAS). Funding Information: Funding: This research was financially supported by Russian Science Foundation grant № 20-72-00184. Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2022/2/1

Y1 - 2022/2/1

N2 - Acousto-optic (AO) interaction in the terahertz range was investigated with the use of monolithic ultrasound transducers of various widths. Sulfur hexafluoride (SF6) liquefied at a temperature of about 23◦C and a pressure of 25 bar was used as a medium for AO interaction. The angular and frequency bandwidths of effective AO interaction, as well as the diffraction efficiency per 1 W of the driving electric power, were determined. For the first time, a correct comparison of the AO diffraction efficiency in SF6 with the use of ultrasound transducers with different widths was carried out. In the experiments performed, the highest energy efficiency of the AO modulator was achieved with a transducer with a width of 12 mm.

AB - Acousto-optic (AO) interaction in the terahertz range was investigated with the use of monolithic ultrasound transducers of various widths. Sulfur hexafluoride (SF6) liquefied at a temperature of about 23◦C and a pressure of 25 bar was used as a medium for AO interaction. The angular and frequency bandwidths of effective AO interaction, as well as the diffraction efficiency per 1 W of the driving electric power, were determined. For the first time, a correct comparison of the AO diffraction efficiency in SF6 with the use of ultrasound transducers with different widths was carried out. In the experiments performed, the highest energy efficiency of the AO modulator was achieved with a transducer with a width of 12 mm.

KW - Acousto-optic interaction

KW - Diffraction

KW - Liquefied inert gas

KW - Terahertz radiation

UR - http://www.scopus.com/inward/record.url?scp=85124201558&partnerID=8YFLogxK

U2 - 10.3390/ma15031203

DO - 10.3390/ma15031203

M3 - Article

C2 - 35161147

AN - SCOPUS:85124201558

VL - 15

JO - Materials

JF - Materials

SN - 1996-1944

IS - 3

M1 - 1203

ER -