A low-loss subwavelength plasmonic waveguide for surface plasmon polariton transmission in optical circuits

Highly Efficient Terahertz Waveguide Using Two-Dimensional Tellurium Photonic Crystals with Complete Photonic Bandgaps

“…It is observed that there is a co-ownership operating frequency domain from the transmission efficiencies of TE and TM modes. A comparison of transmission efficiencies and insertion loss for the waveguides with different wavelengths between our results and the literature [18][19][20] is shown in Table 1 below. When the incident THz waves are incoming along the direction of the central axis of the PhCs waveguide, the power distributions of the THz signals in PhCs with different frequencies are shown as height expressions in Figure 7.…”

“…Wavelength Transmission Insertion Loss [18] 0.85, 1.31, 1.55 µm above 90 percent Less than 10 percent [19] 6 to 9.4 µm above 93.5 percent 0.029 dB/µm [20] 1.55 µm above 90 percent Less than 10 percent Our data 101.7 µm above 92.5 percent 0.34 dB When the incident THz waves are incoming along the direction of the central axis of the PhCs waveguide, the power distributions of the THz signals in PhCs with different frequencies are shown as height expressions in Figure 7. In Figure 7a,b, both TE and TM modes mostly diffuse out of the PhCs waveguide because of this frequency below the lower boundary of the complete PBG; thus, the PhCs waveguide loses the optical local effect at 2.850 THz.…”

“…Based on the extraordinary sunflower-graded PhCs, a large, curved waveguide has been envisaged [18]. A plasmonic waveguide has been designed by placing a graphene nanoribbon between two dielectric layers, which achieved a loss of 0.029 dB/µm and a coupling length of 187.9 µm [19]. The TE and TM band structures have been simulated by plane wave expansion, and a self-collimation-based waveguide has also been investigated using a finite difference time domain method [20].…”

A Highly Sensitive Plasmonic Graphene-Based Structure for Deoxyribonucleic Acid Detection

“…Graphene, for instance, can excite surface plasmon waves in the midinfrared and terahertz frequency ranges. It also reduces the confinement of surface plasmon polaritons (SPPs) to a more reasonable level and exhibits a longer lifespan compared to metals [13]. Similarly, WS 2 , another two-dimensional material, consists of a single layer of s-w-s atoms covalently bonded together and stacked with weak van der Waals bonds [14].…”