Abstract
In order to effectively use single photon sources, we designed waveguides for single photons. These waveguides were nano-scale array structures of metal-coated silicon nanorods and allowed the transport of electromagnetic field with localized surface plasma. By observing the reflectance spectra of different array structures, we investigated the influence of geometrical structures on the resonant enhancement of localized surface plasma. In addition, we managed to build a single photon source by focusing a pulsed laser to excite single quantum dots. Experiments were conducted at room temperature. The arrays of silicon nanorods were constructed on silicon wafers by electron beam lithography. The diameter of each nanorod was 100nm ~ 600 nm and the size of each array was 2μm ~ 2mm. After the arrays were fabricated, silver or gold thin films were deposited on the surfaces either by electron beam evaporation or sputtering. In the setup of single photon source, we used a 405nm picosecond pulsed diode laser and carboxyl CdSe/ZnS quantum dots with emission maxima near 705nm. In order to effectively use single photon sources, we designed waveguides for single photons. These waveguides were nano-scale array structures of metal-coated silicon nanorods and allowed the transport of electromagnetic field with localized surface plasma. By observing the reflectance spectra of different array structures, we investigated the influence of geometrical structures on the resonant enhancement of localized surface plasma. In addition, we managed to build a single photon source by focusing a pulsed laser to excite single quantum dots. Experiments were conducted at room temperature. The arrays of silicon nanorods were constructed on silicon wafers by electron beam lithography. The diameter of each nanorod was 100nm ~ 600 nm and the size of each array was 2μm ~ 2mm. After the arrays were fabricated, silver or gold thin films were deposited on the surfaces either by electron beam evaporation or sputtering. In the setup of single photon source, we used a 405nm picosecond pulsed diode laser and carboxyl CdSe/ZnS quantum dots with emission maxima near 705nm. In the future, we will study the interaction between the single photon source and different nano-scale array structures of nanorods. We will also investigate the effective interaction between two single photons that will be generated at opposite ends of one waveguide. The former can be applied to efficient use of single photon source; on the other hand, the latter is useful in quantum teleportation, quantum information storage and the generation of entangled biphotons.