Spatial correlations of spontaneously down-converted photon pairs detected with a single-photon-sensitive CCD camera

Jost, Bradley M.; Sergienko, Alexander V.; Abouraddy, Ayman F.; Saleh, Bahaa E. A.; Teich, Malvin C.

doi:10.1364/oe.3.000081

Cited by 90 publications

(65 citation statements)

References 17 publications

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“…Spatial and spectral entanglement are a consequence of the multiple possibilities for satisfying conservation of energy and momentum for each photon pair. Interest in the SPDC process has spurred many studies of its spatial and spatio-temporal photon correlation properties [18][19][20][21][22][23][24][25][26][27][28], and some imaging applications based on the measurement of photon-pair coincidence have been proposed [29,30] and tested [31,32].…”

Section: Introductionmentioning

confidence: 99%

Entangled-photon Fourier optics

et al. 2002

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Entangled photons, generated by spontaneous parametric down-conversion from a second-order nonlinear crystal, present a rich potential for imaging and image-processing applications. Since this source is an example of a threewave mixing process, there is more flexibility in the choices of illumination and detection wavelengths and in the placement of object(s) to be imaged.Moreover, this source is entangled, a fact that allows for imaging configurations and capabilities that cannot be achieved using classical sources of light.In this paper we examine a number of imaging and image-processing configurations that can be realized using this source. The formalism that we utilize facilitates the determination of the dependence of imaging resolution on the physical parameters of the optical arrangement.

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Section: Introductionmentioning

confidence: 99%

Entangled-photon Fourier optics

et al. 2002

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“…The frame shows the speckle pattern of both the Stokes and the anti-Stokes scattering with the highest intensity around the driving beam directions. The pattern is produced due to the boson amplification of initially random fields in many spatial modes, just as it happens in spontaneous parametric down-conversion [31] or in Bose-Einsten condensate collisions [32].…”

Section: Resultsmentioning

confidence: 99%

Generation and delayed retrieval of spatially multimode Raman scattering in warm rubidium vapors

Chrapkiewicz¹,

Wasilewski²

2012

Opt. Express

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Abstract:We apply collective Raman scattering to create, store and retrieve spatially multimode light in warm rubidium-87 vapors. The light is created in a spontaneous Stokes scattering process. This is accompanied by the creation of counterpart collective excitations in the atomic ensemble -the spin waves. After a certain storage time we coherently convert the spin waves into the light in deterministic anti-Stokes scattering. The whole process can be regarded as a delayed four-wave mixing which produces pairs of correlated, delayed random images. Storage of higher order spatial modes up to microseconds is possible owing to usage of a buffer gas. We study the performance of the Raman scattering, storage and retrieval of collective excitations focusing on spatial effects and the influence of decoherence caused by diffusion of rubidium atoms in different buffer gases. We quantify the number of modes created and retrieved by analyzing statistical correlations of intensity fluctuations between portions of the light scattered in the far field.

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“…Note that no background subtraction had to be applied in any of these measurements. 6 It is worthwhile to note that the evaluated photon numbers from the measured signal at the ICCD might be a bit smaller than they actually were in the measurement. This stems from possible saturation effects at regions of the CCD chip where many photons are registered.…”

Section: Hybrid-entanglement Of Polarization and Higher-ordermentioning

confidence: 96%

“…3 The whole intensifying process comes at a cost of detection efficiency due to additional losses and non-perfect transformation efficiencies. Nevertheless, ICCD cameras have been used to image non-classical effects for photons produced in an SPDC process [6][7][8][9].…”

Section: Intensified Ccd Camerasmentioning

confidence: 99%

Coincidence Imaging of Spatial Mode Entanglement

Fickler

2015

Quantum Entanglement of Complex Structures of Photons

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The following chapter is based on the publication "Real-time imaging of quantum entanglement" [1].As outlined in the previous section, the transfer setup is very flexible in creating two-dimensional transverse spatial mode entanglement. The investigation of such modes and their complex spatial patterns requires a detection scheme with a high spatial resolution. Masking the modal structure (as shown in the previous section) or scanning a single pixel detector enables the detection of spatial structures. However, these schemes come at a certain cost. Masking the beam and thereby measuring its transverse spatial structure needs to be adapted to the specific mode properties that are under investigation. Hence, it is not flexible for use with a larger variety of modes without adapting the shape of the mask (if possible at all). On the contrary, scanning a single pixel detector does not need to be adapted to the measured modal structure. However, the higher the resolution, the less efficient the detection is, which leads to a drastic increase in time consumption.The rapid progress in imaging technologies over recent years has made charged coupled device (CCD) cameras an interesting alternative for the detection of single photons in quantum optics experiments. The available CCD chips have a huge number of pixels, each sensitive to single-photon detection events (either by pre-or post-intensifying the signal). Therefore, the spatial information for investigating the structure is directly accessible with a very high resolution.Electron multiplied CCD cameras have attracted attention recently because of their high quantum efficiencies of more than 90 %. 1 They have been utilized for 1 The quantum efficiencies (QE) given for CCD cameras should not be confused with the detection efficiencies of single-photon detectors, which can be as high as 60-70 % for avalanche photodiodes (APD). The QE for CCD chips is the ratio between incident photons and electrons generated due to the photon impact. It is often called the spectral response because of its wavelength dependence. Compared to APDs, the detection efficiency is lower because not all electrons might be detected. Other effects, such as fill factor of the chip or absorption of the photon at the gate electrodes, have to

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Spatial correlations of spontaneously down-converted photon pairs detected with a single-photon-sensitive CCD camera

Cited by 90 publications

References 17 publications

Entangled-photon Fourier optics

Entangled-photon Fourier optics

Generation and delayed retrieval of spatially multimode Raman scattering in warm rubidium vapors

Coincidence Imaging of Spatial Mode Entanglement

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