Overcoming the classical Rayleigh diffraction limit by controlling two-point correlations of partially coherent light sources

Liang, Chunhao; Wu, Guannan; Wang, Fei; Li, Wei; Cai, Yangjian; Ponomarenko, Sergey A.

doi:10.1364/oe.25.028352

Cited by 50 publications

(20 citation statements)

References 54 publications

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“…Partially coherent fields can cause several different kinds of modifications to the spatial intensity distribution, such as self-focusing and far-field flat topping, among many others [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. However, they are not the only extraordinary phenomena caused by partial coherence; some correlation functions can decrease scintillation in atmospheric turbulence [17], while others increase the resolving power of imaging systems [18,19]. Many of these sources have been experimentally generated, and their properties are now rather well known [20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Temporal self-splitting of optical pulses

et al. 2018

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We present mathematical models for temporally and spectrally partially coherent pulse trains with LaguerreGaussian and Hermite-Gaussian Schell-model statistics as extensions of the standard Gaussian Schell model for pulse trains. We derive propagation formulas of both classes of pulsed fields in linearly dispersive media and in temporal optical systems. It is found that, in general, both types of fields exhibit time-domain self-splitting upon propagation. The Laguerre-Gaussian model leads to multiply peaked pulses, while the Hermite-Gaussian model leads to doubly peaked pulses, in the temporal far field (in dispersive media) or at the Fourier plane of a temporal system. In both model fields the character of the self-splitting phenomenon depends both on the degree of temporal and spectral coherence and on the power spectrum of the field.

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Section: Introductionmentioning

confidence: 99%

Temporal self-splitting of optical pulses

et al. 2018

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“…Generally, PCBs are characterized by the so-called cross-spectral density (CSD) function in the space-frequency domain or mutual coherence function (MCF) in the space-time domain, and the coherence characteristics of 2 of 10 PCBs are described by the degree of coherence (DOC) which can be obtained from the CSD function or the MCF. It is known that the DOC plays a central role in determining the beam propagation characteristics, image resolution, and effects of interaction with matter [10][11][12][13][14]. However, most studies are focused on the PCBs whose DOCs are of Gaussian function because it is a hard task to devise a physically realizable CSD function with arbitrary DOC.…”

Section: Introductionmentioning

confidence: 99%

Numerical Approach for Studying the Evolution of the Degrees of Coherence of Partially Coherent Beams Propagation through an ABCD Optical System

Kacerovská

Khosravi

et al. 2019

Applied Sciences

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In this paper, we propose a numerical approach to simulate the degree of coherence (DOC) of a partially coherent beam (PCB) with a Schell-model correlator in any transverse plane during propagation. The approach is applicable for PCBs whose initial intensity distribution and DOC distribution are non-Gaussian functions, even for beams for which it is impossible to obtain an analytical expression for the cross-spectral density (CSD) function. Based on our approach, numerical examples for the distribution of the DOC of two types of PCBs are presented. One type is the partially coherent Hermite–Gaussian beam. The simulation results of the DOC agree well with those calculated from the analytical formula. The other type of PCB is the one for which it is impossible to obtain an analytical expression of CSD. The evolution of the DOC with the propagation distance and in the far field is studied in detail. Our numerical approach may find potential applications in optical encryption and information transfer.

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“…The research for physically realizable partially coherent sources keeps on attracting a considerable interest, due to the advantages that partially coherent beams present over their coherent counterparts in some applications, such as, for instance, free space optical communications [1][2][3], imaging [4], and optical trapping [5,6] (see also [7,8] and references therein).…”

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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Overcoming the classical Rayleigh diffraction limit by controlling two-point correlations of partially coherent light sources

Cited by 50 publications

References 54 publications

Temporal self-splitting of optical pulses

Temporal self-splitting of optical pulses

Numerical Approach for Studying the Evolution of the Degrees of Coherence of Partially Coherent Beams Propagation through an ABCD Optical System

Besinc Pseudo-Schell Model Sources with Circular Coherence

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