Gain enhancement in graphene terahertz amplifiers with resonant structures

Yuya Takatsuka; Kazuhiro Takahagi; Eiichi Sano; Victor Ryzhii; Taiichi Otsuji

doi:10.1063/1.4742998

Gain enhancement in graphene terahertz amplifiers with resonant structures

Yuya Takatsuka, Kazuhiro Takahagi, Eiichi Sano, Victor Ryzhii, Taiichi Otsuji

RIEC - Information Communication Platforms Division

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Terahertz (THz) devices have been investigated over the last decade to utilize THz waves for non-destructive sensing and high-speed wireless communications. Graphene with gapless and linear energy spectra is expected to exhibit population inversion and has negative dynamic conductivity in the THz range when it is illuminated by infrared light. We analyze a THz amplifier utilizing this negative dynamic conductivity combined with electric field enhancements due to surface plasmon polaritons induced on a metal mesh and with a resonant structure. We evaluate its characteristics through finite-difference time-domain electromagnetic simulations. The amplifier is expected to remarkably enhance THz emissions compared with amplifiers without the resonant structure.

Original language	English
Article number	033103
Journal	Journal of Applied Physics
Volume	112
Issue number	3
DOIs	https://doi.org/10.1063/1.4742998
Publication status	Published - 2012 Aug

Access to Document

10.1063/1.4742998

Cite this

@article{3f96e2173ac64ba2b305345b0664e404,

title = "Gain enhancement in graphene terahertz amplifiers with resonant structures",

abstract = "Terahertz (THz) devices have been investigated over the last decade to utilize THz waves for non-destructive sensing and high-speed wireless communications. Graphene with gapless and linear energy spectra is expected to exhibit population inversion and has negative dynamic conductivity in the THz range when it is illuminated by infrared light. We analyze a THz amplifier utilizing this negative dynamic conductivity combined with electric field enhancements due to surface plasmon polaritons induced on a metal mesh and with a resonant structure. We evaluate its characteristics through finite-difference time-domain electromagnetic simulations. The amplifier is expected to remarkably enhance THz emissions compared with amplifiers without the resonant structure.",

author = "Yuya Takatsuka and Kazuhiro Takahagi and Eiichi Sano and Victor Ryzhii and Taiichi Otsuji",

note = "Funding Information: The present study was done with support from the JST CREST program and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.",

year = "2012",

month = aug,

doi = "10.1063/1.4742998",

language = "English",

volume = "112",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "3",

}

TY - JOUR

T1 - Gain enhancement in graphene terahertz amplifiers with resonant structures

AU - Takatsuka, Yuya

AU - Takahagi, Kazuhiro

AU - Sano, Eiichi

AU - Ryzhii, Victor

AU - Otsuji, Taiichi

N1 - Funding Information: The present study was done with support from the JST CREST program and a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2012/8

Y1 - 2012/8

N2 - Terahertz (THz) devices have been investigated over the last decade to utilize THz waves for non-destructive sensing and high-speed wireless communications. Graphene with gapless and linear energy spectra is expected to exhibit population inversion and has negative dynamic conductivity in the THz range when it is illuminated by infrared light. We analyze a THz amplifier utilizing this negative dynamic conductivity combined with electric field enhancements due to surface plasmon polaritons induced on a metal mesh and with a resonant structure. We evaluate its characteristics through finite-difference time-domain electromagnetic simulations. The amplifier is expected to remarkably enhance THz emissions compared with amplifiers without the resonant structure.

AB - Terahertz (THz) devices have been investigated over the last decade to utilize THz waves for non-destructive sensing and high-speed wireless communications. Graphene with gapless and linear energy spectra is expected to exhibit population inversion and has negative dynamic conductivity in the THz range when it is illuminated by infrared light. We analyze a THz amplifier utilizing this negative dynamic conductivity combined with electric field enhancements due to surface plasmon polaritons induced on a metal mesh and with a resonant structure. We evaluate its characteristics through finite-difference time-domain electromagnetic simulations. The amplifier is expected to remarkably enhance THz emissions compared with amplifiers without the resonant structure.

UR - http://www.scopus.com/inward/record.url?scp=84865220955&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865220955&partnerID=8YFLogxK

U2 - 10.1063/1.4742998

DO - 10.1063/1.4742998

M3 - Article

AN - SCOPUS:84865220955

SN - 0021-8979

VL - 112

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 3

M1 - 033103

ER -

Gain enhancement in graphene terahertz amplifiers with resonant structures

Abstract

Access to Document

Other files and links

Fingerprint

Cite this