THz sources based on frequency conversion of multi-line molecular lasers in nonlinear crystals and on optically pumped molecular lasers

Ионин, А. А.; Kinyaevskiy, I. O.; Klimachev, Yu.M.; Kotkov, A. A.; Sagitova, A. M.

doi:10.1051/epjconf/201819503004

Cited by 1 publication

(1 citation statement)

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“…However, the planar geometry of graphene geometric diodes has the advantage of a femtosecond RC time constant, providing a basic necessity for the detection of high-frequency IR signals. The fabricated rectenna, employing graphene geometric diodes coupled to bowtie antennas, depicts strong optical behavior at 28 THz when the rectenna is excited by a CO 2 laser at room temperature [293]. The maximum equivalent power of the rectenna at IR frequencies is 10 −9 WHz −1/2 with the IR detection of 10 8 cm Hz 1/2 W −1 .…”

Section: Graphene-based Rectennas For Energy Harvesting Applicationsmentioning

confidence: 98%

A Review on the Development of Tunable Graphene Nanoantennas for Terahertz Optoelectronic and Plasmonic Applications

Ullah

Witjaksono

Nawi

et al. 2020

Sensors

104

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Exceptional advancement has been made in the development of graphene optical nanoantennas. They are incorporated with optoelectronic devices for plasmonics application and have been an active research area across the globe. The interest in graphene plasmonic devices is driven by the different applications they have empowered, such as ultrafast nanodevices, photodetection, energy harvesting, biosensing, biomedical imaging and high-speed terahertz communications. In this article, the aim is to provide a detailed review of the essential explanation behind graphene nanoantennas experimental proofs for the developments of graphene-based plasmonics antennas, achieving enhanced light–matter interaction by exploiting graphene material conductivity and optical properties. First, the fundamental graphene nanoantennas and their tunable resonant behavior over THz frequencies are summarized. Furthermore, incorporating graphene–metal hybrid antennas with optoelectronic devices can prompt the acknowledgment of multi-platforms for photonics. More interestingly, various technical methods are critically studied for frequency tuning and active modulation of optical characteristics, through in situ modulations by applying an external electric field. Second, the various methods for radiation beam scanning and beam reconfigurability are discussed through reflectarray and leaky-wave graphene antennas. In particular, numerous graphene antenna photodetectors and graphene rectennas for energy harvesting are studied by giving a critical evaluation of antenna performances, enhanced photodetection, energy conversion efficiency and the significant problems that remain to be addressed. Finally, the potential developments in the synthesis of graphene material and technological methods involved in the fabrication of graphene–metal nanoantennas are discussed.

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Section: Graphene-based Rectennas For Energy Harvesting Applicationsmentioning

confidence: 98%

A Review on the Development of Tunable Graphene Nanoantennas for Terahertz Optoelectronic and Plasmonic Applications

Ullah

Witjaksono

Nawi

et al. 2020

Sensors

104

View full text Add to dashboard Cite

show abstract

THz sources based on frequency conversion of multi-line molecular lasers in nonlinear crystals and on optically pumped molecular lasers

Cited by 1 publication

References 19 publications

A Review on the Development of Tunable Graphene Nanoantennas for Terahertz Optoelectronic and Plasmonic Applications

A Review on the Development of Tunable Graphene Nanoantennas for Terahertz Optoelectronic and Plasmonic Applications

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