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Study On The Performance Of Single Photon Source With Optical Antenna

Posted on:2015-03-04Degree:MasterType:Thesis
Country:ChinaCandidate:T DingFull Text:PDF
GTID:2298330467963212Subject:Optics
Abstract/Summary:PDF Full Text Request
As a key part of the practical quantum key distribution technology, single photon source plays an important role in quantum communication. Both quantum cryptography and quantum computation protocols require efficient single photon sources. Researchers have used considerable schemes to enhance the radiative decay rate and directivity of the single photon source. Of special interest is that optical antennas act as a resonator mediating between the radiation field and emitter to confine far-field radiation in a localized, sub-diffraction limited volume. Metallic nanoparticles support plasmon resonances that interact strongly with optical fields and for this reason are explored for a wide range of applications. Surface plasmon polaritons (SPPs) in these kinds of nanoantennas are used to produce greatly enhanced and highly localized electric field, which can help to obtain good photon collection efficiency and high Purcell factor. Dielectric optical antennas are also exploited to enhance the directivity and quantum efficiency of the single photon source. In this paper, single photon source and optical antenna are firstly investigated. Then a novel fan-rod optical antenna is designed. In addition, the fan-rod optical antenna is simulated with the Finite Difference Time Domain method, and the Purcell effect is discussed. Furthermore, a metallic-dielectric Yagi-Uda optical antenna is simulated, presenting high radiative decay rate and directivity simultaneously. The theories, simulations and calculations in this paper are important for the experimental operation of single photon source with nanoantenna.
Keywords/Search Tags:single photon source, optical antenna, nanoantenna, surface plasmon polaritons, radiative decay rate, directivity
PDF Full Text Request
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