Negative refraction of a partially coherent electromagnetic beam

Lahiri, Mayukh; Wolf, Emil

doi:10.1364/ol.38.001407

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Recently, the statistical properties of stochastic electromagnetic vortex beams propagating in various media have been investigated extensively, including free space [12,13], turbulent atmosphere [14,15], turbulent biological tissues [16], oceanic turbulence [17], etc. In addition, the interaction of the stochastic electromagnetic beam-like fields with LHM has been analyzed [18][19][20]. It has also been studied that the rotation of the optical vortex is reversed when a Laguerre-Gaussian beam propagates in LHM [21].…”

Section: Introductionmentioning

confidence: 99%

Propagation of a stochastic electromagnetic vortex beam in right- and left-handed materials

Guo¹,

Zhao

2014

J. Opt.

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Based on the generalized diffraction integral formula for an optical system consisting of right- and left-handed materials, an analytical expression for the elements of the 2 × 2 cross-spectral density matrix of a stochastic electromagnetic vortex beam propagating through such an optical system is derived. Numerical examples illustrate that the source values of the spectral density, the spectral degree of coherence, and the spectral degree of polarization can be reconstructed by passing the beam through two alternating layers, RHM and LHM. Furthermore, we find that by varying the refractive index ratio of the materials, the position of the reconstructing plane can be modulated significantly. It is also interesting to find that a dark channel can be generated by choosing appropriate values of the topological charge and the thickness of each layer.

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Section: Introductionmentioning

confidence: 99%

Propagation of a stochastic electromagnetic vortex beam in right- and left-handed materials

Guo¹,

Zhao

2014

J. Opt.

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Random sources for cusped beams

Li¹,

Wang²,

Korotkova³

2016

Opt. Express

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We introduce two novel classes of partially coherent sources whose degrees of coherence are described by the rectangular Lorentz-correlated Schell-model (LSM) and rectangular fractional multi-Gaussian-correlated Schell-model (FMGSM) functions. Based on the generalized Collins formula, analytical expressions are derived for the spectral density distributions of these beams propagating through a stigmatic ABCD optical system. It is shown that beams belonging to both classes form the spectral density apex that is much higher and sharper than that generated by the Gaussian Schell-model (GSM) beam with a comparable coherence state. We experimentally generate these beams by using a nematic, transmissive spatial light modulator (SLM) that serves as a random phase screen controlled by a computer. The experimental data is consistent with theoretical predictions. Moreover, it is illustrated that the FMGSM beam generated in our experiments has a better focusing capacity than the GSM beam with the same coherence state. The applications that can potentially benefit from the use of novel beams range from material surface processing, to communications and sensing through random media.

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Negative refraction of a partially coherent electromagnetic beam

Cited by 2 publications

References 10 publications

Propagation of a stochastic electromagnetic vortex beam in right- and left-handed materials

Propagation of a stochastic electromagnetic vortex beam in right- and left-handed materials

Random sources for cusped beams

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