Parametric Down-Conversion of X Rays into the Optical Regime

Schori, A.; Bömer, Christina; Borodin, D.; Collins, Steven; Detlefs, Blanka; Sala, M. Moretti; Yudovich, Shimon; Shwartz, Sharon

doi:10.1103/physrevlett.119.253902

Cited by 30 publications

(33 citation statements)

References 14 publications

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“…However, the authors of all the previous papers on x ray and either UV or optical nonlinear interactions have considered only local responses [1][2][3][4][5][6][7][8][9][10][11]. The interactions have been viewed as inelastic x-ray scattering from local charge excitations where both atomic and bond charge responses have been considered [1][2][3][4][5][6][7].…”

Section: Most Of the Valence Electronic Resonances Of Materials Are Imentioning

confidence: 99%

“…The field of nonlinear interactions between x rays and longer wavelengths has made a major progress in recent years [1][2][3][4][5][6][7][8][9]. These processes are interesting, since they present novel physics involving fundamental aspects of light-matter interactions arising from the large diversity of the involved wavelengths, and since they can be used to probe phenomena related to valence electrons at the atomic scale resolution [9,10].…”

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confidence: 99%

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Evidence for Collective Nonlinear Interactions in X Ray into Ultraviolet Parametric Down-Conversion

et al. 2019

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We present the observation of peculiar non-monotonic photon energy dependencies of the count rates and of the rocking curves of parametric down-conversion of x rays into ultraviolet far from any atomic resonances. The observations cannot be explained by models that consider only atomic or bond charge responses and suggest that collective phenomena contribute to the effect. We propose an interpretation that includes nonlinear interactions with plasmons, which can explain the existence of peaks in this energy range. Our work implies that nonlinear interactions between x rays and either ultraviolet or visible radiation can be utilized as a powerful atomic scale probe for collective effects in solids.

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Section: Most Of the Valence Electronic Resonances Of Materials Are Imentioning

confidence: 99%

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confidence: 99%

Evidence for Collective Nonlinear Interactions in X Ray into Ultraviolet Parametric Down-Conversion

et al. 2019

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“…The experimental observation of the second kind of PDC, i.e. the PDC of X-rays into the optical regime, has been reported by Schori et al (2017) (in this work see also the references about X-ray and optical wave mixing SFG and DFG processes). The authors used an X-ray synchrotron source of radiation.…”

Section: Introductionmentioning

confidence: 56%

Investigation of third-order nonlinear dynamical X-ray diffraction based on a new exact solution

Balyan

2020

J Synchrotron Radiat

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Third-order nonlinear two-wave dynamical X-ray diffraction in a crystal is considered. For the Laue symmetrical case of diffraction a new exact solution is obtained. The solution is presented via Jacobi elliptic functions. Two input free parameters are essential: the deviation parameter from the Bragg exact angle and the intensity of the incident wave. It is shown that the behavior of the field inside the crystal is determined by the sign of a certain combination of these parameters. For negative and positive signs of this combination, the wavefield is periodic and the nonlinear Pendellösung effect takes place. For the nonlinear Pendellösung distance the appropriate expressions are obtained. When the above-mentioned combination is zero, the behavior of the field can be periodic as well as non-periodic and the solution is presented by elementary functions. In the nonperiodic case, the nonlinear case Pendellösung distance tends to infinity. The wavefield diffracts and propagates in a medium, whose susceptibility is modulated by the amplitudes of the wavefields. The behavior of the wavefield can be described also by an effective deviation from the Bragg exact angle. This deviation is also a function of the wavefields.

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“…This shows that QIUP can be partic-ularly promising in cases where the wavelength to which available cameras are sensitive is larger than the wavelength required for object illumination. In a recent experiment, photon pairs -with one photon having wavelength in the range of x-ray and the other at optical wavelengths -have been generated [44]. Therefore, it is certainly possible to design an experiment, where an object is illuminated by x-ray and the detected photon has optical wavelength.…”

Section: Discussionmentioning

confidence: 99%

Resolution of Quantum Imaging with Undetected Photons

Fuenzalida

Hochrainer

Lemos

et al. 2022

Quantum

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Quantum imaging with undetected photons is a recently introduced technique that goes significantly beyond what was previously possible. In this technique, images are formed without detecting the light that interacted with the object that is imaged. Given this unique advantage over the existing imaging schemes, it is now of utmost importance to understand its resolution limits, in particular what governs the maximal achievable spatial resolution. We show both theoretically and experimentally that the momentum correlation between the detected and undetected photons governs the spatial resolution — a stronger correlation results in a higher resolution. In our experiment, the momentum correlation plays the dominating role in determining the resolution compared to the effect of diffraction. We find that the resolution is determined by the wavelength of the undetected light rather than the wavelength of the detected light. Our results thus show that it is in principle possible to obtain resolution characterized by a wavelength much shorter than the detected wavelength.

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Parametric Down-Conversion of X Rays into the Optical Regime

Cited by 30 publications

References 14 publications

Evidence for Collective Nonlinear Interactions in X Ray into Ultraviolet Parametric Down-Conversion

Evidence for Collective Nonlinear Interactions in X Ray into Ultraviolet Parametric Down-Conversion

Investigation of third-order nonlinear dynamical X-ray diffraction based on a new exact solution

Resolution of Quantum Imaging with Undetected Photons

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