Image and coherence transfer in the stimulated down-conversion process

Ribeiro, P. H. Souto; Pádua, S.; Monken, C. H.

doi:10.1103/physreva.60.5074

Cited by 32 publications

(26 citation statements)

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“…It is clear from expression (28) above that C cl (x 1 , x 2 ) predicts spatial bunching, as expected from any classical light source. In view of the above analysis, the results presented here describe an entirely quantum fourth-order interference effect, with no classical analog [30].…”

Section: Discussionmentioning

confidence: 99%

“…In this context, the single count detection rate R cl (x) should be proportional to the classical average intensity I(x) , whereas the coincidence count rate C cl (x 1 , x 2 ) should be proportional to the intensity-intensity (or the fourth-order) correlation function I(x 1 )I(x 2 ) . The single count detection rate of down-converted light in the presence of a double-slit has been studied in previous works [26,27,28]. In reference [27] it was demonstrated that in terms of its single count rate, SPDC behaves like a classical Schell-model extended light source.…”

Section: Discussionmentioning

confidence: 99%

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Spatial antibunching of photons with parametric down-conversion

et al. 2002

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The theoretical framework behind a recent experiment by Nogueira et al. [Phys. Rev. Lett. 86, 4009 (2001)] of spatial antibunching in a two-photon state generated by collinear type II parametric down-conversion and a birefringent double-slit is presented. The fourth-order quantum correlation function is evaluated and shown to violate the classical Schwarz-type inequality, ensuring that the field does not have a classical analog. We expect these results to be useful in the rapidly growing fields of quantum imaging and quantum information.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Spatial antibunching of photons with parametric down-conversion

et al. 2002

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“…The first two-photon imaging experiment was performed by using the entangled photon pairs [1]. Then this work led to many interesting studies, while the results mainly focused on the field of quantum optics [2][3][4][5]. Soon Bennink et al provided an experimental demonstration of correlated imaging by using a classical source [6].…”

Section: Introductionmentioning

confidence: 97%

Visibility of ghost imaging in a two-arm microscope imaging system

Bai

Gao

Liu

et al. 2012

Journal of Modern Optics

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Ghost imaging with a classical thermal source is investigated in a two-arm microscope imaging system. The dependence of the imaging visibility on the aperture of the reference lens is discussed. It is shown that by using large apertures, good visibility as well as enhancing resolution can be obtained. The effects from the distance the object is moved away from the original plane are also studied, and one can obtain good visibility with a well-resolved image by changing the distance.

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“…[5]. It was also predicted that the stimulated field propagates as the complex conjugate of one of the input fields.…”

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“…As a result the conjugate twin beam, which will be called the stimulated beam, has its intensity enhanced and its spectral characteristics changed in the way it was discussed theoretically in Ref. [5]. The stimulated beam is generated from the superposition of the pump and auxiliary beams, under the restrictions imposed by the phase matching on a particular nonlinear medium.…”

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confidence: 99%

Observation of Image Transfer and Phase Conjugation in Stimulated Down-Conversion

et al. 2001

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We observe experimentally the transfer of angular spectrum and image formation in the process of stimulated parametric down-conversion. Images and interference patterns can be transferred from either the pump or the auxiliary laser beams to the stimulated down-converted one. The stimulated field propagates as the complex conjugate of the auxiliary laser. The phase conjugation is observed through intensity pattern measurements. DOI: 10.1103/PhysRevLett.87.133602 PACS numbers: 42.50.Ar, 42.25.Kb The cavity-free stimulated down-conversion is a threewave mixing (TWM) process. TWM has been viewed as a nonlinear optical process, with promising applications for correcting wave front distortions. However, when this process was described by a quantum theory [1], new possibilities were opened. The importance of the quantum approach is closely related to the great success of the spontaneous parametric down-conversion in quantum optics [2] and the connection between the stimulated and the spontaneous processes. The quantum properties of the stimulated down-conversion light has not yet been the subject of intense investigation. It was experimentally observed and studied by Mandel and co-workers [3]. Special attention was given to its coherence properties, presenting characteristics of thermal and coherent states [1,3,4], but its individual quantum state was never put forward.In this Letter, we study experimentally the transfer of angular spectrum and image formation in the stimulated down-conversion, as predicted in Ref. [5]. It was also predicted that the stimulated field propagates as the complex conjugate of one of the input fields. The understanding of the angular spectrum transfer has allowed the observation of the phase conjugation by direct intensity measurements. Our results have a classical counterpart (except for the spontaneous emission part) in the framework of the TWM, but they support the quantum theory of Ref. [5]. The relation between the angular spectrum of the pump, auxiliary (signal), and stimulated (idler) beams has not been demonstrated thus far, to the best of our knowledge. These relations are important because they will help us to separate the spontaneous from the stimulated emission contributions in the total idler field which will help us understand phase conjugation at the quantum level [6].

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Image and coherence transfer in the stimulated down-conversion process

Cited by 32 publications

References 9 publications

Spatial antibunching of photons with parametric down-conversion

Spatial antibunching of photons with parametric down-conversion

Visibility of ghost imaging in a two-arm microscope imaging system

Observation of Image Transfer and Phase Conjugation in Stimulated Down-Conversion

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