Photoconductive antenna as local oscillator in terahertz frequency measurement: heterodyne efficiency and bias effect
Sign Up to like & getrecommendations! Published in 2018 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-018-1577-y
Abstract: In a photoconductive antenna (PCA), femtosecond-laser-excited carriers will form a broadband terahertz photon-carrier (PC) comb, and the terahertz PC comb can be used as a multi-frequency local oscillator to carry out heterodyne detection of continuous… read more here.
Keywords: local oscillator; photoconductive antenna; frequency; heterodyne ... See more keywords
Peak amplitude enhancement of photoconductive antenna using periodic nanoslit and graphene in the THz band
Sign Up to like & getrecommendations! Published in 2019 at "Optik"
DOI: 10.1016/j.ijleo.2019.03.033
Abstract: Abstract Increasing peak amplitude of THz signals plays a key role in applications such as biomedical imaging, biological applications, and security screening. Improving peak amplitude of photoconductive antenna (PCA) has been investigated in this work.… read more here.
Keywords: thz; photoconductive antenna; peak amplitude; periodic nanoslit ... See more keywords
Comparison of terahertz time-domain spectroscopy based on photoconductive antenna and electro-optic sampling and the optical parameter measurement of GaSe nanofilm in THz band
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DOI: 10.1016/j.ijleo.2021.166822
Abstract: Abstract Due to the advantages of THz wave in nondestructive examination (NDE) of materials, terahertz time-domain spectrometer (THz-TDS) has become a mature device for THz detection. Thus, improving signal-to-noise ratio (SNR) and reliability of THz-TDS… read more here.
Keywords: thz; terahertz time; photoconductive antenna; thz tds ... See more keywords
Terahertz radiation enhancement in dipole photoconductive antenna on LT-GaAs using a gold plasmonic nanodisk array
Sign Up to like & getrecommendations! Published in 2019 at "Optics and Laser Technology"
DOI: 10.1016/j.optlastec.2019.105726
Abstract: Abstract This study proposes a new-fashioned plasmonic photoconductive antenna (PCA) with high optical-to-terahertz (THz) conversion efficiency. Finite element method was used to investigate and optimize the interaction of 800 nm femtosecond laser with the designed nanodisk… read more here.
Keywords: nanodisk array; photoconductive antenna; terahertz; radiation ... See more keywords
Improvement of Terahertz Photoconductive Antenna using Optical Antenna Array of ZnO Nanorods
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DOI: 10.1038/s41598-019-38820-3
Abstract: An efficient terahertz (THz) photoconductive antenna (PCA), as a major constituent for the generation or detection of THz waves, plays an essential role in bridging microwave-to-photonic gaps. Here, we propose an impressive approach comprising the… read more here.
Keywords: improvement terahertz; photoconductive antenna; zno; optical antenna ... See more keywords
Terahertz photoconductive antenna based on antireflection dielectric metasurfaces with embedded plasmonic nanodisks.
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DOI: 10.1364/ao.431678
Abstract: By taking advantage of dielectric metasurfaces and plasmonic nanostructures, a terahertz photoconductive antenna (THz-PCA) is proposed and investigated in detail. The designed dielectric metasurfaces can reduce the optical reflection down to 1.4% and accelerate the… read more here.
Keywords: photoconductive antenna; pca; thz pca; dielectric metasurfaces ... See more keywords
Multi-Energy Valley Scattering Characteristics for a SI-GaAs-Based Terahertz Photoconductive Antenna in Linear Mode
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DOI: 10.3390/app10010007
Abstract: In this paper, the relationship between the terahertz radiation and the spatial distribution of photogenerated carriers under different bias electric field is studied. Terahertz pulses and the photocurrent of SI-GaAs photoconductive antenna are measured by… read more here.
Keywords: bias electric; photoconductive antenna; field; photogenerated carriers ... See more keywords