Towards a single photon frequency conversion
| Autor: | OSCAR ADRIAN JIMENEZ GORDILLO |
|---|---|
| Přispěvatelé: | JOSE JAVIER SANCHEZ MONDRAGON, JORGE ROBERTO ZURITA SANCHEZ |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Instituto Nacional de Astrofísica, Óptica y Electrónica INAOE Repositorio Institucional del INAOE |
| Popis: | Quantum frequency up-conversion (QFC) of non-classical states of light allows the integration of different quantum systems working at different energies. This process takes advantage of telecommunication wavelengths photons for optical fiber transmission of quantum information, and near visible wavelengths for data manipulation and storage. The key objective of QFC is to guarantee that the input photon number probability distribution is maintained after the conversion process. With this, we will be able to efficiently study the single-photon emission properties of epitaxial InAs/GaAs quantum dots embedded in a photonic crystal nanocavities without the problems that inefficient IR wavelengths detectors imply. The up-conversion process consists on combining two optical fields, in a nonlinear medium, to generate a third field that is equal to the two inputs frequency sum. To fulfill the momentum conservation, required by this process, we need to compensate the wave vector mismatch between the output and input beams. This is achieved by using a grating in the nonlinear medium, a process named quasi-phase matching (QPM). In this work we use a Zinc doped periodically poled LiNbO3 (Zn:PPLN WG) waveguide as the nonlinear material. To achieve the quantum frequency conversion of a semiconductor quantum dot (QD) single photons emission, embedded in a photonic crystal nanocavity, we started by characterizing the performance of the PPLN-WG in the optical power macro-regime. Signal photons, produced by an 1175nm laser, simulating our QD emission line, are combined with pump photons, produced by a C-band laser, with a dichroic mirror before entering the PPLN waveguide. In order to achieve the phase matched wavelength in the PPLN, its temperature must be finely tuned. The signal coming out of the PPLN waveguide is filtered and analyzed. |
| Databáze: | OpenAIRE |
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