9 research outputs found
All-Optical Fiber Hanbury Brown & Twiss Interferometer to study 1300 nm single photon emission of a metamorphic InAs Quantum Dot
[EN] New optical fiber based spectroscopic tools open the possibility to develop more robust and efficient characterization experiments. Spectral filtering and light reflection have been used to produce compact and versatile fiber based optical cavities and sensors. Moreover, these technologies would be also suitable to study N-photon correlations, where high collection efficiency and frequency tunability is desirable. We demonstrated single photon emission of a single quantum dot emitting at 1300 nm, using a Fiber Bragg Grating for wavelength filtering and InGaAs Avalanche Photodiodes operated in Geiger mode for single photon detection. As we do not observe any significant fine structure splitting for the neutral exciton transition within our spectral resolution (46 mu eV), metamorphic QD single photon emission studied with our all-fiber Hanbury Brown & Twiss interferometer could lead to a more efficient analysis of entangled photon sources at telecom wavelength. This all-optical fiber scheme opens the door to new first and second order interferometers to study photon indistinguishability, entangled photon and photon cross correlation in the more interesting telecom wavelengths.G Munoz-Matutano thanks the Spanish Juan de la Cierva program (JCI-2011-10686). We acknowledge the support of the Spanish MINECO through projects TEC2014-53727-C2-1-R & TEC2014-60378-C2-1-R, the Research Excellency Award Program GVA PROMETEO 2013/012 PROMETEOII/2014/059 and the Explora Ciencia Tecnologia TEC2013-50552-EXP MULTIFUN project, and the Nanoscale Quantum Optics MPNS COST Action MP1403.MuĂąoz Matutano, G.; Barrera Vilar, D.; Fernandez-Pousa, CR.; Chulia-Jordan, R.; Seravalli. L.; Trevisi, G.; Frigeri, P.... (2016). All-Optical Fiber Hanbury Brown & Twiss Interferometer to study 1300 nm single photon emission of a metamorphic InAs Quantum Dot. Scientific Reports. 6(2721):1-9. https://doi.org/10.1038/srep27214S1962721Walmsley, I. A. 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Parallel Recording of Single Quantum Dot Optical Emission Using Multicore Fibers
(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.Single Indium Arsenide Quantum Dot emission spectra have been recorded using a four-core, crosstalk-free, multicore fiber placed at the collection arm of a confocal microscope. We developed two different measurement set-ups depending on the relative configuration of the excitation and collection spots. In the single-matched mode, the emission from the excited area is collected by a single core in the multicore fiber, whereas the three remaining cores capture the emission from neighboring, non-excited areas. This procedure allows for the recording of the Quantum Dot emission from carrier diffusion between sample positions separated by more than 6 μm.
In the multiple-matched mode, the excitation spot overlaps the four cores emission area. This configuration permits the acquisition of the micro-photoluminescence spectra at different sample positions without scanning. These results show the possibilities offered by multicore fibers for the spectroscopic analysis of single semiconductor Quantum Dot optical emission.This work was supported in part by the Research Excellency Award Program GVA PROMETEO under Grant 2013/012, in part by the Explora Ciencia Tecnologia through the MULTIFUN Project under Grant TEC2013-50552-EXP, in part by the Research Excellency Award Program GVA PROMETEOII under Grant 2014/059, and in part by the Ministerio de Economia y Competitividad under Grant TEC2014-53727-C2-1-R and Grant TEC2014-60378-C2-1-R. The work of G. Munoz-Matutano was supported by the Spanish Ministerio de Economia y Competitividad through the Juan de la Cierva Program under Grant JCI-2011-10686. The work of I. Gasulla was supported by the Spanish Ministerio de Economia y Competitividad through the Ramon y Cajal Program under Grant RyC-2014-16247.MuĂąoz-Matutano, G.; Barrera Vilar, D.; Fernandez-Pousa, CR.; Chulia-Jordan, R.; Martinez-Pastor, J.; Gasulla Mestre, I.; Seravalli, L.... (2016). Parallel Recording of Single Quantum Dot Optical Emission Using Multicore Fibers. IEEE Photonics Technology Letters. 28(11):1257-1260. https://doi.org/10.1109/LPT.2016.2538302S12571260281
Correspondence: Strongly-driven Re + CO2 redox reaction at high-pressure and high-temperature
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Comparison of the Different Bandgap Cavities in a Metallic Four-Mode Plasmonic Structure
Structural and vibrational behavior of cubic Cu1.80(3)Se cuprous selenide, berzelianite, under compression
[EN] We have performed an experimental study of the crystal structure and lattice dynamics of cubic Cu1.80(3)Se at ambient temperature and high pressures. Two reversible phase transitions were found at 2.9 and 8.7 GPa. The indexation of the angle-dispersive synchrotron x-ray diffraction patterns suggests a large orthorhombic cell and a monoclinic cell for the high-pressure phases. Raman measurements provide additional information on the local structure. The compressibility of the three ambient temperature phases has been determined and compared to that of other sulphides and selenides.This work has been performed under financial support from Spanish MICINN under projects MAT2016-75586-C4-2/3-P, FIS2017-83295-P, and PGC2018-097520-A-I00, as well as under the MALTA Consolider Team network (RED2018-102612-T), from Generalitat Valenciana under project PROMETEO/2018/123-EFIMAT, and from Brazilian Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) under projects 307199/2018-5, 422250/2016-3, and 201050/2012-9. D.S-P. and J.A.S. acknowledge the financial support of the Spanish MINECO for the RyC-2014-15643 and RyC-2015-17482 Ramon y Cajal Grants, respectively. We also thank ALBA synchrotron for funded experiment No. 2012010266.Chulia-Jordan, R.; Santamaria-Perez, D.; Pereira, ALJ.; Garcia-Domene, B.; Vilaplana Cerda, RI.; Sans-Tresserras, JĂ.; Martinez-Garcia, D.... (2020). Structural and vibrational behavior of cubic Cu1.80(3)Se cuprous selenide, berzelianite, under compression. Journal of Alloys and Compounds. 830:154646 - 1-154646 - 8. https://doi.org/10.1016/j.jallcom.2020.154646S154646 - 1154646 - 883