Tunable Terahertz Amplifier Based on Slow Light Edge Mode in Graphene Plasmonic Crystal

A terahertz (THz) amplifier based on graphene plasmonic crystal is presented in this paper. The amplifier is composed of periodic graphene-silicon arrays, and graphene is used as the THz wave gain medium due to its negative conductivity at a certain temperature and bias voltage. The plasmonic bandgap and cascade amplification effect effectively improve the gain of the THz wave in a single slow light mode at the photonic band edge, which greatly increase the effective interaction distance of THz waves in the graphene with a limited gain coefficient and gain medium thickness. Moreover, with the thermal and electronic control on the conductivity and refractive index of graphene, the operating frequency and amplification efficiency of this device can be broadly tuned. The results show that a THz output with a gain of larger than 30 dB and $Q$ value of 720 is achieved in this device. This device has a great potential application in the THz communication, imaging, and radar system integrated with other THz solid-state electronic sources and detectors.

[1]  A. Maître,et al.  Determination of the Surface Plasmon Polariton Extraction Efficiency from a Self-Assembled Plasmonic Crystal , 2013, Plasmonics.

[2]  Q. Gu,et al.  Experimental demonstration of longitudinal beam phase-space linearizer in a free-electron laser facility by corrugated structures. , 2014, Physical review letters.

[3]  Liang Dong,et al.  Strain-tunable plasmonic crystal using elevated nanodisks with polarization-dependent characteristics , 2016 .

[4]  D. Jena,et al.  Broadband graphene terahertz modulators enabled by intraband transitions , 2012, Nature Communications.

[5]  Aiting Jiang,et al.  Broadly tunable terahertz generation in mid-infrared quantum cascade lasers , 2013, Nature Communications.

[6]  V. Ryzhii,et al.  Negative dynamic conductivity of graphene with optical pumping , 2007 .

[7]  L. Falkovsky,et al.  Optical far-infrared properties of a graphene monolayer and multilayer , 2007, 0707.1386.

[8]  Hirokazu Fukidome,et al.  Graphene-based devices in terahertz science and technology , 2012 .

[9]  Sai Chen,et al.  Tunable nonreciprocal terahertz transmission and enhancement based on metal/magneto-optic plasmonic lens. , 2013, Optics express.

[10]  G. Hanson.  Dyadic Green's functions and guided surface waves for a surface conductivity model of graphene , 2007, cond-mat/0701205.

[11]  Choon How Gan,et al.  Synthesis of highly confined surface plasmon modes with doped graphene sheets in the mid-infrared and terahertz frequencies , 2012, 1203.4308.

[12]  Hyunsoo Yang,et al.  Graphene/liquid crystal based terahertz phase shifters. , 2013, Optics express.

[13]  Bing-zheng Xu,et al.  A novel structure for tunable terahertz absorber based on graphene. , 2013, Optics express.

[14]  V. Ryzhii,et al.  Gain enhancement in graphene terahertz amplifier with resonant structure , 2012, SDM 2012.

[15]  G. Walsh.  TERAHERTZ RADIATION , 2001 .

[16]  Ivan Mukhin,et al.  Hyperbolic metamaterials based on multilayer graphene structures , 2012, 1211.5117.

[17]  Sadao Adachi,et al.  a-Silicon (a-Si) , 1999 .

[18]  Seungyong Jung,et al.  Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources , 2014, Nature Communications.

[19]  Taiichi Otsuji,et al.  Amplification and lasing of terahertz radiation by plasmons in graphene with a planar distributed Bragg resonator , 2013 .

[20]  R. Kersting,et al.  Terahertz imaging with nanometer resolution , 2003 .

[21]  J. S. Gomez-Diaz,et al.  Analysis and design of terahertz antennas based on plasmonic resonant graphene sheets , 2012 .

[22]  Y. Saito,et al.  Evolution of Field Electron Emission Pattern from Multilayered Graphene Induced by Structural Change of Edge , 2012 .

[23]  V. P. Gusynin,et al.  Sum Rules for the Optical and Hall Conductivity in Graphene , 2007 .

[24]  Xueming Liu,et al.  Graphene plasmonic lens for manipulating energy flow , 2014, Scientific Reports.

[25]  W. Kwok,et al.  Emission of Coherent THz Radiation from Superconductors , 2007, Science.

[26]  Carlo Sirtori,et al.  Wave engineering with THz quantum cascade lasers , 2013, Nature Photonics.

[27]  Shengjiang Chang,et al.  Real-time quantitative terahertz microfluidic sensing based on photonic crystal pillar array , 2013 .

[28]  V. Ryzhii,et al.  The gain enhancement effect of surface plasmon polaritons on terahertz stimulated emission in optically pumped monolayer graphene , 2013, 2014 Conference on Lasers and Electro-Optics (CLEO) - Laser Science to Photonic Applications.

[29]  F. Lederer,et al.  A perfect absorber made of a graphene micro-ribbon metamaterial. , 2012, Optics express.

[30]  J. Schmalian,et al.  Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene. , 2011, Physical review letters.

[31]  Hyunyong Choi,et al.  Ultrafast refractive index control of a terahertz graphene metamaterial , 2013, Scientific Reports.

[32]  Nader Engheta,et al.  Transformation Optics Using Graphene , 2011, Science.

[33]  P. Avouris,et al.  Graphene plasmonics for terahertz to mid-infrared applications. , 2014, ACS nano.

[34]  Taiichi Otsuji,et al.  Ultrafast carrier dynamics and terahertz emission in optically pumped graphene at room temperature , 2012 .

[35]  Michael S. Shur,et al.  Plasmonic terahertz lasing in an array of graphene nanocavities , 2012 .

[36]  Jeong-Woo Choi,et al.  3D graphene oxide-encapsulated gold nanoparticles to detect neural stem cell differentiation. , 2013, Biomaterials.

[37]  Daniel M. Mittleman,et al.  Frontiers in terahertz sources and plasmonics , 2013, Nature Photonics.