Vortex pseudo Schell-model source: A proposal

Martı́nez-Herrero, R.; Maluenda, David; Piquero, Gemma; Sande, Juan Carlos González de

doi:10.1109/wio.2016.7745596

Cited by 3 publications

(5 citation statements)

References 25 publications

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“…Therefore, it turns out that all points belonging to circles centered on the symmetry center are perfectly correlated. Because of the dependence on the difference of radial coordinates of the two considered points, such sources will be called pseudo-Schell model sources [46]. Different classes of pseudo-Schell model sources can be obtained by changing the functional dependence on the above difference.…”

Section: Introductionmentioning

confidence: 99%

Pseudo-Schell model sources

Sande¹,

Martı́nez-Herrero²,

Piquero³

et al. 2019

Opt. Express

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Partially coherent pseudo-Schell model sources are introduced and analyzed. They present radial symmetry and coherence characteristics depending on the difference between the radial distances of two points from the source center. As a consequence, all points belonging to circles centered on the symmetry center of the source are perfectly correlated. We show that such sources radiate fields with peculiar behaviors in paraxial propagation. In particular, when compared to beams produced by Gaussian Schell-model sources with comparable coherence parameters, the irradiance can present sharper profiles and higher peak values and a better beam quality parameter. Furthermore, when a pseudo-Schell model source presents a vortex, the propagated beam preserves a null of the intensity along its axis.

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Section: Introductionmentioning

confidence: 99%

Pseudo-Schell model sources

Sande¹,

Martı́nez-Herrero²,

Piquero³

et al. 2019

Opt. Express

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“…is determined by the function g. Moreover, the absolute value of the degree of coherence depends only on the difference between the radial distances of the considered points from the source center. This means that the coherence characteristics of such sources are shift invariant along the radial coordinate and, therefore, they belong to the class of the pseudo-Schell model sources [20,24]. Different families of pseudo-Schell sources are generated for each selection of the functions G(υ) and τ (r 2 ).…”

Section: Source Modelmentioning

confidence: 99%

“…In analogy to the Schell model, scalar sources that present shift-invariance only along either the radial or azimuthal coordinate have been recently proposed [18,20,24,25]. Since their coherence properties are shift-invariant only along a polar coordinate, they have been named pseudo-Schell model sources [20,24]. Their cross-spectral density (CSD) can fulfill the non-negativeness condition [10,26], in which case they represent physically realizable sources.…”

Section: Introductionmentioning

confidence: 99%

Besinc Pseudo-Schell Model Sources with Circular Coherence

et al. 2019

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Partially coherent sources with non-conventional coherence properties present unusual behaviors during propagation, which have potential application in fields like optical trapping and microscopy. Recently, partially coherent sources exhibiting circular coherence have been introduced and experimentally realized. Among them, the so-called pseudo Schell-model sources present coherence properties that depend only on the difference between the radial coordinates of two points. Here, the intensity and coherence properties of the fields radiated from pseudo Schell-model sources with a degree of coherence of the besinc type are analyzed in detail. A sharpening of the intensity profile is found for the propagated beam by appropriately selecting the coherence parameters. As a possible application, the trapping of different types of dielectric nanoparticles with this kind of beam is described.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] It is also expected that interesting results could be found if the vectorial nature of light is taken into account. The coherence and polarization characteristics of a light source can be appropriately described by its cross-spectral density matrix (CSDM).…”

Section: Introductionmentioning

confidence: 99%

“…Their coherence characteristics are not shift invariant, as it occurs for sources of the Schell-model type, but depend on the difference between the moduli of the two point vectors considered. 13 We shall call them polarized pseudo-Schell model sources. The coherence and polarization characteristics of this kind of fields at the plane source and upon free space propagation will be analyzed in detail.…”

Section: Introductionmentioning

confidence: 99%

Partially polarized pseudo-Schell model sources

Martı́nez-Herrero

Maluenda

Piquero

et al. 2017

Third International Conference on Applications of Optics and Photonics

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In this work a new type of partially polarized and partially coherent sources is proposed. The coherence characteristics of these sources are dependent on the difference of the radial distances from the source center of the two points to be compared. The coherence is perfect for points located on the same circle centered on the source center and decreases for points that belongs to different concentric circles. The maximum attainable coherence is related to the degree of polarization of the source. Coherence and polarization characteristics of this kind of fields at the source plane and upon free space propagation are analyzed in detail for a simple case. For the particular presented example, a partially polarized and partially coherent field is obtained, whose polarization properties are invariant in propagation.

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Vortex pseudo Schell-model source: A proposal

Abstract: Abstract-In this work a physically realizable pseudo Schellmodel planar light source with optical vortex is proposed. The characteristics of irradiance and coherence of the beam radiated by this type of source are analysed at the source plane and upon free paraxial propagation.

Cited by 3 publications

References 25 publications

Pseudo-Schell model sources

Pseudo-Schell model sources

Besinc Pseudo-Schell Model Sources with Circular Coherence

Partially polarized pseudo-Schell model sources

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