Manipulating Light in Coupled Asymmetric Nanostructures Induced by a Visible–NIR Laser

摘要: We design an asymmetric nanostructure in the longitudinal direction at visible–NIR range, which enables high enhancement factor and has properties of Fano resonance induced by a laser. By simulating analyzing frequency spectra various nanorods, nanodipoles, combined nanoantennas, we optimize resonant enhanced such nanoantennas. It broad-band with FWHM from 800 to 1,100 nm possesses two peaks 870 1,000 nm, 24. The current density distribution nanoantennas different phases is also simulated order investigate its mode. This theoretical study paves way towards nanoscale lightwave control spectral splitting. designed nanodevices provide great potential for applications ultrasensitive color sorters biosensors lasers.