Efficiency of Photoconductive Terahertz Generation in Nitrogen-Doped Diamonds

The efficiency of the generation of terahertz radiation from nitrogen-doped (∼0.1–100 ppm) diamonds was investigated. The synthetic polycrystalline and monocrystalline diamond substrates were pumped by a 400 nm femtosecond laser and tested for the photoconductive emitter operation. The dependency of...

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Bibliographic Details
Published inPhotonics Vol. 9; no. 1; p. 18
Main Authors Kononenko, Vitali V., Komlenok, Maxim S., Chizhov, Pavel A., Bukin, Vladimir V., Bulgakova, Vladislava V., Khomich, Andrey A., Bolshakov, Andrey P., Konov, Vitaly I., Garnov, Sergey V.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2022
Subjects
Antennas
Aperture
Chemical vapor deposition
diamond
Diamonds
Emitters
femtosecond pumping
large-aperture photoconductive antenna
laser plasma and photocurrent
Lasers
Nitrogen
optical defects
Optical properties
pulse THz radiation
Radiation
Spectrum analysis
Substrates
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Summary:The efficiency of the generation of terahertz radiation from nitrogen-doped (∼0.1–100 ppm) diamonds was investigated. The synthetic polycrystalline and monocrystalline diamond substrates were pumped by a 400 nm femtosecond laser and tested for the photoconductive emitter operation. The dependency of the emitted THz power on the intensity of the optical excitation was measured. The nitrogen concentrations of the diamonds involved were measured from the optical absorbance, which was found to crucially depend on the synthesis technique. The observed correlation between the doping level and the level of the performance of diamond-based antennas demonstrates the prospects of doped diamond as a material for highly efficient large-aperture photoconductive antennas.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9010018