Double V-groove dielectric loaded plasmonic waveguide for sensing applications

Design and analysis of Si photonic NaCl sensors based on suspended microdisk resonators

“…In addition, changes in the optical refractive index of a material due to variations in its fundamental parameters, such as expansion, pressure, and even chemical reactions, can be evaluated [2][3][4][5]. In the optical refractive index sensor, variations in the refractive index of the sensing region lead to variations in the resonance wavelength or the output power [6,7]. Therefore, variations in environmental pollution, body tissues, polymers, and concentration of organic materials (usually soluble in water) can be sensed.…”

“…To date, various devices have been proposed to implement optical sensors, which are mainly based on the Mach-Zehnder interferometer [13], surface plasmons [6,7,[13][14][15], Bragg gratings [16,17], photonic crystals [18], and whispering gallery mode (WGM) resonators [19]. WGM resonators can be constructed in various configurations, such as microring, microdisk, microsphere, and microtoroid resonators [14,[20][21][22][23][24][25][26].…”

Graphene-Coated Nanowire Waveguides and Their Applications

“…Graphene [9], a two-dimensional (2D) carbon material, was proved to be an alternate material that could excite SPs in the mid and far-infrared bands owing to its unprecedented properties such as the tunability, extremely strong modal field confinement, and huge field enhancement [10][11][12]. Therefore, lots of graphene-based novel optical devices, including waveguides [13][14][15][16][17][18][19], modulators [20,21], switches [22][23][24], polarizers [25,26], sensors [27,28], antenna [29], etc., have been developed, and the research of graphene plasmonics has promoted the development of nanophotonics. Particularly, the GCNWs [30][31][32][33][34][35] have aroused lots of research interest, and the wide applications of GCNWs in photonic devices have become one of the research hot spots in recent years.…”