Saturation effects in nonlinear absorption, refraction, and frequency conversion: a review

Rao, A.S.

doi:10.1016/j.ijleo.2022.169638

Cited by 9 publications

(3 citation statements)

References 333 publications

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“…My model can be further extended to explain the polarization properties of the structured modes, whose transverse intensity distribution follows the Bessel function [56][57][58][59][60]. For application purposes, the wavelength of BBs can be tuned through nonlinear-wave mixing, which is polarization-dependent [61][62][63]. The nonlinear wave-mixing of BBs not only tunes the wavelength but also changes their order (this is not true for a zero-order BB).…”

Section: Resultsmentioning

confidence: 99%

Illustrations of Bessel Beams in s-Polarization, p-Polarization, Transverse Polarization, and Longitudinal Polarization

Rao

2023

Photonics

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The generation of Bessel beams (BBs) and their characterization in a wide range of the electromagnetic spectrum are well established. The unique properties of BBs, including their non-diffracting and self-healing nature, make them efficient for use in material science and engineering technology. Here, I investigate the polarization components (s-polarization, p-polarization, transverse polarization, and longitudinal polarization) created in scalar BBs owing to their conical wave front. For emphasis, I provide a theoretical analysis to characterize potential experimental artifacts created in the four polarization components. Further, I provide a brief discussion on how to prevent these artifacts in scalar BBs. To my knowledge, for the first time, I can generate vector BBs in s-polarization and p-polarization via the superposition of two orthogonally polarized scalar BBs. This method of generation can provide the four well-known types of vector modes categorized in the V-point phase singularity vector modes. I suggest a suitable experimental configuration for realizing my theoretical results experimentally. The present analysis is very practical and beneficial for young researchers who seek to utilize BBs in light applications of modern science and technology.

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Section: Resultsmentioning

confidence: 99%

Illustrations of Bessel Beams in s-Polarization, p-Polarization, Transverse Polarization, and Longitudinal Polarization

Rao

2023

Photonics

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“…The observation of the Talbot effect in Cosine beams not only provides a conceptual understanding but also opens the door for a variety of new applications [48]. The Cosine beams and needle structures created from them may be potentially useful in the investigation of nonlinear optical properties of materials [49][50][51]. The 3D optical structures created by the Cosine beams can be utilized in material fabrication to create micro-and nano-structures [52][53][54].…”

Section: Cosine Beams In Modern Sciencementioning

confidence: 99%

An Intriguing Interpretation of 1D and 2D Non-Diffracting Modes in Cosine Profile

Rao

2023

Photonics

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We provide a simple analysis based on ray optics and Dirac notation for 1D (one-dimensional) and 2D (two-dimensional) non-diffracting modes in the cosine profile, which are often called Cosine beams. We explore various kinds of structured modes formed by the superposition of two 1D Cosine beams. We then went on to understand the properties of the Bessel beams in terms of Cosine beams. For the first time, we report on the generation of three-dimensional tunable needle structures based on the interference of 1D Cosine beams. These size-tunable optical needles can have multiple advantages in material processing. Also, we report, for the first time, on the Talbot effect in Cosine beams. Straightforward mathematical calculations are used to derive analytical expressions for Cosine beams. The present method of demonstrating Cosine beams may be utilized to understand other structured modes. The Dirac notation-based interference explanation used here can provide new researchers with an easy way to understand the wave nature of light in a fundamental aspect of interferometric experiments as well as in advanced-level experiments such as beam engineering technology, imaging, particle manipulation, light sheet microscopy, and light–matter interaction. We also provide an in-depth analysis of similarities among Cosine, Bessel, and Hermite–Gaussian beams.

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“…In [4], a detailed analysis of saturation effects occurred in various fields of nonlinear optics and considered the nonlinear optical properties of various optical materials with a fast nonlinear optical response, which can be promising candidates for photonic applications, such as optical communications, optical limiters, optical data storage, information processing, passive laser mode-locking, etc. In [5], several multiphoton active materials 2 of 16 and major applications of multiphoton excitation were described, including pumped lasing to achieve tunable up-conversion of coherent light.…”

Section: Introductionmentioning

confidence: 99%

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO2 Glasses Doped with Pr3+

Bezkrovna,

Lisiecki,

Macalik

et al. 2024

Materials

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The application of ultraviolet-C light in the field of surface treatment or photodynamic therapy is highly prospective. In this regard, the stable fluorescent silicate SrO-CaO-MgO-SiO2-Pr2O3 glasses able to effectively convert visible excitation on the ultraviolet praseodymium emission were fabricated and examined. An unusual wide-range visible-to-UVC up-conversion within 240–410 nm has been achieved in Pr3+-doped glasses, revealing their potential advantage in different sophisticated disinfection technologies. The integrated emission intensity was studied as a function of light excitation power to assess a mechanism attributed to UVC luminescence. Especially, it was revealed that the multicomponent silicate glass qualities and praseodymium 3PJ excited state peculiarities are favorable to obtaining useful broadband ultraviolet up-converted luminescence. The glass dispersion qualities were determined between 450–2300 nm. The impact of praseodymium concentration on Vis-NIR spectroscopic glass qualities was evaluated employing absorption spectra, emission spectra, and decay curves of luminescence associated with two involved praseodymium excited states. Especially, efficient interionic interactions can be inferred by investigating the decrease in 1D2 state experimental lifetime in the heavily doped samples. Examination of absorption spectra as a function of temperature implied that excitation at 445 nm should be quite effective up to T = 625 K. Contrary to this, temperature elevation gives rise to a moderate lowering of the visible praseodymium luminescence.

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Saturation effects in nonlinear absorption, refraction, and frequency conversion: a review

Cited by 9 publications

References 333 publications

Illustrations of Bessel Beams in s-Polarization, p-Polarization, Transverse Polarization, and Longitudinal Polarization

Illustrations of Bessel Beams in s-Polarization, p-Polarization, Transverse Polarization, and Longitudinal Polarization

An Intriguing Interpretation of 1D and 2D Non-Diffracting Modes in Cosine Profile

UVC Up-Conversion and Vis-NIR Luminescence Examined in SrO-CaO-MgO-SiO2 Glasses Doped with Pr3+

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