Reconfigurable Plasmonic Logic Gates

Integrated Optical Circuits with Surface Plasmon Polaritons

“…All of these logic gates are reversible and can be implemented in a single configuration containing three graphene regions whose refractive index can be adjusted independently using individually contacted gate electrodes. The results obtained in this chapter have been published in [8]. In all situations we have found that transmission can be strongly modulated, which is important for practical applications involving logic gates.…”

“…For the implementation of some logic gates a MDM slot waveguide with constant section and one, two or three regions with variable electrical permittivity or different refractive index can be used (see Figure 5, which also indicates the dimensions of the configuration) [8]. Graphene can be embedded in the slot waveguide to obtain a variable permittivity region.…”

“…The logic gate in these figures operates at 1.55 m, which is an important wavelength in applications. Other logic gates can be implemented, for example CNOT, AND, OR if two graphene sections are activated by gate electrodes [8].…”

“…In order to obtain a much different shaped output pulse from that of the input pulse, the optical circuit must have a strongly frequency dependent transmission coefficient and the incident optical pulse should be as short as possible. I used the analogy with the microwave transmission lines [6][7] to describe each section of the waveguide length L through a matrix A(L): (8) and the impedance given by Z0 = kSPP d / .…”

Thermal and electro-optic properties of graphene oxide-doped hexylcyanobiphenyl liquid crystal

“…Twodimensional graphene and graphene oxide (GO) nanoparticles, on the other hand, have newly found a place in LC-related research. Graphene might be used in plasmonic logic gate to change dielectric constant [31]. It was found that phase transition temperature decreased with graphene dopant in nematic liquid crystals [32].…”