Acoustic-Optic Modulation of Terahertz Radiation in Liquefied Sulfur Hexafluoride at Low Temperatures
The operation of an acousto-optic modulator prototype of terahertz radiation based on liquefied sulfur hexafluoride at a temperature of + 10 °C has been investigated. The acousto-optic diffraction of the radiation with a wavelength of 130 μm was observed at a Bragg angle of about 4°. It was found that the diffraction efficiency was 13 times greater than one at a temperature + 25 °C.