[1] Gramotnev D K, Bozhevolnyi S I. Nanofocusing of electromagnetic radiation[J]. Nature Photonics, 8, 13-22(2014).

[2] Gramotnev D K, Bozhevolnyi S I. Plasmonics beyond the diffraction limit[J]. Nature Photonics, 4, 83-91(2010).

[3] Cao Q, Lalanne P. Negative role of surface plasmons in the transmission of metallic gratings with very narrow slits[J]. Physical Review Letters, 88, 057403(2002).

[4] Chen Y L, Xu J, Shi N N et al. Mode properties of metal-insulator-metal waveguide Bragg grating[J]. Acta Optica Sinica, 37, 1123002(2017).

[5] Bian Y S, Zheng Z, Zhao X et al. Symmetric hybrid surface plasmon polariton waveguides for 3D photonic integration[J]. Optics Express, 17, 21320-21325(2009).

[6] Chen L, Zhang T, Li X et al. Novel hybrid plasmonic waveguide consisting of two identical dielectric nanowires symmetrically placed on each side of a thin metal film[J]. Optics Express, 20, 20535-20544(2012).

[7] Wang W H, Zhou W J, Fu T et al. Reduced propagation loss of surface plasmon polaritons on Ag nanowire-graphene hybrid[J]. Nano Energy, 48, 197-201(2018).

[8] Xu J, Shi N N, Chen Y L et al. TM01 mode in a cylindrical hybrid plasmonic waveguide with large propagation length[J]. Applied Optics, 57, 4043-4047(2018).

[9] Gao Y X, Shadrivov I V. Second harmonic generation in graphene-coated nanowires[J]. Optics Letters, 41, 3623-3626(2016).

[10] Jablan M, Buljan H. Solja i M. Plasmonics in graphene at infrared frequencies[J]. Physical Review B, 80, 245435(2009).

[11] Vakil A, Engheta N. Transformation optics using graphene[J]. Science, 332, 1291-1294(2011).

[12] Li Y, Zhang H F, Fan T X et al. Theoretical analysis of double dielectric loaded graphene surface plasmon polariton[J]. Acta Optica Sinica, 36, 0724001(2016).

[13] Xu W, Zhu Z H, Liu K et al. Dielectric loaded graphene plasmon waveguide[J]. Optics Express, 23, 5147-5153(2015).

[14] Liu P H, Zhang X Z, Ma Z H et al. Surface plasmon modes in graphene wedge and groove waveguides[J]. Optics Express, 21, 32432-32440(2013).

[15] Dai Y Y, Zhu X L, Mortensen N A et al. Nanofocusing in a tapered graphene plasmonic waveguide[J]. Journal of Optics, 17, 065002(2015).

[16] Jabbarzadeh F, Habibzadeh-Sharif A. Double V-groove dielectric loaded plasmonic waveguide for sensing applications[J]. Journal of the Optical Society of America B, 36, 690-696(2019).

[17] Liang H W, Zhang L, Zhang S et al. Gate-programmable electro-optical addressing array of graphene-coated nanowires with sub-10 nm resolution[J]. ACS Photonics, 3, 1847-1853(2016).

[18] Kou J L, Chen J H, Chen Y et al. Platform for enhanced light-graphene interaction length and miniaturizing fiber stereo devices[J]. Optica, 1, 307-310(2014).

[19] Lu Z L, Zhao W S. Nanoscale electro-optic modulators based on graphene-slot waveguides[J]. Journal of the Optical Society of America B, 29, 1490-1496(2012).

[20] Ye S W, Wang Z S, Tang L F et al. Electro-absorption optical modulator using dual-graphene-on-graphene configuration[J]. Optics Express, 22, 26173-26180(2014).

[21] Yuan Y, Xie Y N, Li X. Frequency-tunable graphene patch antenna in terahertz regime[J]. Acta Optica Sinica, 38, 0216001(2018).

[22] Xie Y N, Liu Z K, Geng L et al. Properties of graphene and antenna applications in microwave to THz[J]. Acta Optica Sinica, 35, s116005(2015).

[23] Gao Y X, Ren G B, Zhu B F et al. Analytical model for plasmon modes in graphene-coated nanowire[J]. Optics Express, 22, 24322-24331(2014).

[24] Gao Y X, Ren G B, Zhu B F et al. Single-mode graphene-coated nanowire plasmonic waveguide[J]. Optics Letters, 39, 5909-5912(2014).

[25] Liu J P, Zhai X, Wang L L et al. Analysis of mid-infrared surface plasmon modes in a graphene-based cylindrical hybrid waveguide[J]. Plasmonics, 11, 703-711(2016).

[26] Hajati M, Hajati Y. High-performance and low-loss plasmon waveguiding in graphene-coated nanowire with substrate[J]. Journal of the Optical Society of America B, 33, 2560-2565(2016).

[27] Teng D, Wang K, Li Z et al. Graphene-coated elliptical nanowires for low loss subwavelength terahertz transmission[J]. Applied Sciences, 9, 2351(2019).

[28] Zhai L, Xue W R, Yang R C et al. Propagation properties of nano dielectric parallel lines coated with graphene[J]. Acta Optica Sinica, 35, 1123002(2015).

[29] Zhu B F, Ren G B, Yang Y et al. Field enhancement and gradient force in the graphene-coated nanowire pairs[J]. Plasmonics, 10, 839-845(2015).

[30] Teng D, Wang K, Li Z et al. Graphene-coated nanowire dimers for deep subwavelength waveguiding in mid-infrared range[J]. Optics Express, 27, 12458-12469(2019).

[31] Wu D, Tian J P. Study on the plasmonic characteristics of bow-tie type graphene-coated nanowire pair[J]. Optik, 156, 689-695(2018).

[32] Hajati M, Hajati Y. Plasmonic characteristics of two vertically coupled graphene-coated nanowires integrated with substrate[J]. Applied Optics, 56, 870-875(2017).

[33] Wei Z Z, Xue W R, Peng Y L et al. Mode characteristics of waveguides based on three graphene-coated dielectric nanowires[J]. Acta Optica Sinica, 39, 0124001(2019).

[34] Jiang J, Zhang D H, Zhang B L et al. Interaction between graphene-coated nanowires revisited with transformation optics[J]. Optics Letters, 42, 2890-2893(2017).

[35] Chen M, Sheng P C, Sun W et al. A symmetric terahertz graphene-based hybrid plasmonic waveguide[J]. Optics Communications, 376, 41-46(2016).

[36] Liu J P, Zhai X, Wang L L et al. Graphene-based long-range SPP hybrid waveguide with ultra-long propagation length in mid-infrared range[J]. Optics Express, 24, 5376-5386(2016).

[37] Ye L F, Sui K H, Liu Y H et al. Graphene-based hybrid plasmonic waveguide for highly efficient broadband mid-infrared propagation and modulation[J]. Optics Express, 26, 15935-15947(2018).

[38] Wu D, Tian J P, Yang R C. Study of mode performances of graphene-coated nanowire integrated with triangle wedge substrate[J]. Journal of Nonlinear Optical Physics & Materials, 27, 1850013(2018).

[39] Zhang T, Chen L, Li X. Graphene-based tunable broadband hyperlens for far-field subdiffraction imaging at mid-infrared frequencies[J]. Optics Express, 21, 20888-20899(2013).

[40] Hanson G W. Quasi-transverse electromagnetic modes supported by a graphene parallel-plate waveguide[J]. Journal of Applied Physics, 104, 084314(2008).

[41] Oulton R F, Sorger V J, Genov D A et al. A hybrid plasmonic waveguide for subwavelength confinement and long-range propagation[J]. Nature Photonics, 2, 496-500(2008).

[42] Berini P. Figures of merit for surface plasmon waveguides[J]. Optics Express, 14, 13030-13042(2006).

[43] Kuzmin D A, Bychkov I V, Shavrov V G et al. Transverse-electric plasmonic modes of cylindrical graphene-based waveguide at near-infrared and visible frequencies[J]. Scientific Reports, 6, 26915(2016).

[44] Wan P, Yang C H. Properties of graphene TE mode surface plasmons and surface plasmon waveguides[J]. Acta Optica Sinica, 37, 1124002(2017).