Study of terahertz spoof surface plasmons on subwavelength gratings with dielectric substance in grooves

Numerical Optimization of Refractive Index Sensors Based on Diffraction Gratings with High Aspect Ratio in Terahertz Range

“…Due to this, the momentum matching condition can be rewritten as where is the diffraction order and the sign on the right corresponds to the negative and positive diffraction order, respectively. In the terahertz frequency range, the dielectric permittivity of metal is high and [ 5 , 6 ], so for it follows from Equation (2) that …”

“…High narrow peaks in the spectra and high concentration of the electromagnetic field are required for detection of low concentrations of the substance and tiny changes in the dielectric medium. The use of SPR in the terahertz frequency range on thin metal films is limited due to the high values of the optical constants of metals [ 5 , 6 ]. To overcome this problem, different authors suggest their solutions based on 2D and 3D metamaterials, subwavelength gratings, graphene, and graphene nanotube, as well as others [ 7 , 8 , 9 ].…”

International Conference and Youth School «Information Technologies and Nanotechnology» (ITNT-2017)

“…Компьютерная оптика и нанофотоника В данной секции были рассмотрены такие вопро-сы, как исследование влияния изменения мощности Гауссова пучка на движение поглощающих свет мик-рочастиц, захваченных в области пучка [26], изучение поверхностных плазмонов на субволновых решетках [27], особенности дифракции Гауссова пучка с круго-вой поляризацией на градиентных микролинзах со слоями субволновой толщины [28], фокусировка оп-тического вихря с азимутальной поляризацией [29], а также описывается формирование лазерного пучка для модификации материалов с ферритно-мартен-ситной структурой [30].…”

Dispersive Propagation of Terahertz Pulses in a Plasmonic Fiber

“…In [4], the effect of a dielectric coating on THz surface plasmon pulse propagation along a copper wire was studied. Recent studies show that THz surface plasmon waves can propagate not only at the boundary between a metal and a dielectric layer, but also along line-guided metallic structures, such as grooves, stripes, gratings, graphene metasurfaces and gaps [9][10][11][12][13][14][15][16][17][18][19]. Detailed reviews on terahertz technology and SPWs in the THz regime are presented in [20][21][22].…”