A5086258665- Orbital Angular Momentum in Optics
- Plasmonic and Surface Plasmon Research
- Near-Field Optical Microscopy
- Quantum Information and Cryptography
- Optical Polarization and Ellipsometry
- Advanced Fiber Laser Technologies
- Metamaterials and Metasurfaces Applications
- Quantum optics and atomic interactions
- Nonlinear Dynamics and Pattern Formation
- Photonic and Optical Devices
- Cold Atom Physics and Bose-Einstein Condensates
- stochastic dynamics and bifurcation
- Sperm and Testicular Function
- Random lasers and scattering media
- Advanced Antenna and Metasurface Technologies
- Cancer survivorship and care
- Nonlinear Photonic Systems
- Quantum Mechanics and Applications
- Advanced Fiber Optic Sensors
- Optical Wireless Communication Technologies
- Geriatric Care and Nursing Homes
- Electronic Health Records Systems
- Photonic Crystal and Fiber Optics
- Dietary Effects on Health
- Antioxidants, Aging, Portulaca oleracea
University of Maryland, Baltimore
2016-2025
Wuhan University of Technology
2024
Nanjing University of Science and Technology
2015-2023
Ten Chen Hospital
2023
University of Baltimore
2023
National University of Singapore
2020-2023
Geriatric Research Education and Clinical Center
2023
Maryland Department of Health
2023
Zhejiang University of Technology
2023
Soochow University
2010-2021
Laser fluctuations are measured and characterized with a new technique based on the concept of first-passage-time distributions. This makes it possible to discern quantum noise in dye laser even presence pump that many orders magnitude larger. We report analytic experimental results for mean, variance, skewness The agree well numerical computations measurements. Our is particularly suited quantitative description above threshold; complements conventional photoelectric counting correlation...
We have measured the distribution of times for single-mode laser radiation to grow from an equilibrium spontaneous-emission background a prescribed value intensity. These passage-time distributions are compared with results Monte Carlo simulations and demonstrate new technique description statistical fluctuations in lasers.
Analytical formula is derived for the propagation factor (known asM(2)-factor) of a stochastic electromagnetic Gaussian Schell-model (EGSM) beam in free space and turbulent atmosphere. In space, M(2)-factor an EGSM mainly determined by its initial degree polarization, r.m.s. widths spectral densities correlation coefficients, value remains invariant on propagation. atmosphere, also parameters increases The relative with lower factors, larger longer wavelength less affected atmospheric...
Laguerre-Gaussian Schell-model (LGSM) beam was proposed in theory [Opt. Lett.38, 91 (2013 Opt. 1814 (2013)] just recently. In this paper, we study the propagation of a LGSM turbulent atmosphere. Analytical expressions for cross-spectral density and second-order moments Wigner distribution function atmosphere are derived. The statistical properties, such as degree coherence factor, studied detail. It is found that with larger mode order n less affected by turbulence than smaller or GSM under...
Scalar cosine-Gaussian-correlated Schell-model (CGCSM) beams of circular or rectangular symmetry were introduced just recently. In this paper, a new kind partially coherent vector beam named CGCSM with radial polarization (i.e., radially polarized beam) is introduced. The realizability conditions for source and the condition radiation generated by such are derived. statistical properties, as average intensity, degree coherence, state polarization, focused thin lens analyzed in detail. It...
We carry out an experimental and theoretical study of the focusing properties a Gaussian Schell-model (GSM) vortex beam. It is found that we can shape beam profile focused GSM by varying its initial spatial coherence width. Focused dark hollow, flat-topped, spots be obtained in our experiment, which will useful for trapping particles. The results agree well with results.
Recently, we introduced a new class of radially polarized cosine-Gaussian correlated Schell-model (CGCSM) beams rectangular symmetry based on the partially coherent electromagnetic theory [Opt. Express23, 33099 (2015)]. In this paper, extend work to study second-order statistics such as average intensity, spectral degree coherence, polarization and state in anisotropic turbulence an extended von Karman power spectrum with non-Kolmogorov law α effective parameter. Analytical formulas for...
We derive the general expression for orbital angular momentum (OAM) flux of an astigmatic partially coherent beam carrying twist phase [i.e., twisted anisotropic Gaussian-Schell model (TAGSM) beam] propagating through ABCD optical system with loss or gain. The evolution properties OAM a TAGSM in Gaussian cavity cylindrical thin lens are illustrated numerically help derived formula. It is found that we can modulate by varying parameters orientation angle lens, which will be useful some...
We demonstrate a convenient approach for simultaneously manipulating the amplitude and polarization of light beams by means modulation correlation structure. As an illustration, arbitrary radially polarized array (RPA) beam radial or rectangular symmetry is obtained focusing conventional with specially designed The physical realizability conditions such source far-field condition are derived. It illustrated that beamlet shape state strictly controlled initial structure parameter....
A new class of twisted Schell-model array correlated sources are introduced based on Mercer's expansion. It turns out that such can be expressed as superposition fully coherent Laguerre-Gaussian modes, and the twistable condition is established. Furthermore, basis a stretched coordinate system quadratic approximation, analytical expressions for mutual coherence function an anisotropic non-Kolmogorov turbulence cross-spectral density Gaussian beam rigorously derived. Due to presence twist...
Since the celebrated twist phase was proposed by Simon and Mukunda, despite tremendous progress made in theory over past decades, developing a simple flexible experimental method to customize this novel has long been tricky challenge. In Letter, we demonstrate general for generating twisted Schell-model beams implementing continuous coherent beam integral function discrete form. Experimental results based on rigorous Laguerre–Gauss modes superposition are also demonstrated, indicating that...
We report the experimental measurement of beam parameters an electromagnetic Gaussian Schell-model (EGSM) source based on technique for measuring fourth-order correlation function (i.e., intensity function). Furthermore, we carry out distribution a focused EGSM beam, and theoretical simulation using measured parameters. Our results agree reasonably well with predictions.
A flexible pseudo-mode sampling superposition method for synthesizing partially coherent sources has been introduced that can be thought of as an approximate discrete representation Gori’s nonnegative definiteness criterion designing spatial correlation functions. Importantly, without performing formidable mode analysis, this enables us to develop a convenient and efficient experimental technology customize sacrificing theoretical accuracy. As example, we experimentally generate new, the...
In a recent publication (Appl. Phys. Lett. 100 (2012) 051108), monochromatic partially coherent radially polarized (RP) beam was generated experimentally. this paper, we analyze the spectral changes of polychromatic RP focused by thin lens for first time, and compare with that scalar GSM beam. Furthermore, report experimental generation carry out measurement such lens. Our results show behavior is different from are consistent theoretical predictions.
The inverse method of proving the twistability cross-spectral density (CSD) inevitably falls into spontaneous difficulties. Based on a nonnegative self-consistent design guideline for generating genuine CSDs introduced by Gori and Santarsiero, we demonstrate feasible way twisting partially coherent sources sticking Schell-model function to CSDs, which also determines upper bound strength. Analysis shows that degree coherence new class twisted pseudo-Gaussian beam is neither shift invariant...
Analytical formulas for the Wigner distribution functions and second-order moments (SOMs) of a twisted Gaussian Schell-model (TGSM) beam propagating through anisotropic turbulence have been derived by means tensor method. It is found that propagation law SOMs TGSM spreading in can be described as first-order optical systems with an additional turbulence-induced effect. Based on SOMs, statistics terms effective width, M2-factor, orbital angular momentum flux, radius curvature are analyzed...
With the help of a tensor method, an explicit expression for M2-factor stochastic electromagnetic Gaussian Schell-model (EGSM) beam in cavity is derived. Evolution properties EGSM are studied numerically detail. It found that behavior determined by statistical source and parameters cavity. Thermal lens effect induced changes also investigated. Our results will be useful many applications, such as free-space optical communications, laser radar system, trapping imaging, where beams required.