Self-referenced interferometry for single-shot detection of vector-vortex beams

Kumar, Praveen; Nishchal, Naveen K.; Omatsu, Takashige; Rao, A.S.

doi:10.1038/s41598-022-21485-w

Cited by 16 publications

(4 citation statements)

References 69 publications

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“…where ϕ is the phase delay between the two orthogonally linear polarized BBs and j stands for s-polarization and p-polarization. As shown in Figure 4, we can generate four well-known types of vector modes [46,47] in the zero-order BB, which have central bright intensity. The four types of vector modes created in BBs are given in the white insets of Figure 4.…”

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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“…For orientations 205 • and 210 • , the contrast of the dark stripe across the double-lobe intensity profiles underlines that the average TC of the third-order harmonic beam is positive and an integer (+1). Notice that the accurate measurement of the sign and magnitude of the TC of lower-order harmonic vortex beams can be inferred using the intensity distribution once the vortex beam propagates through a slit [39] or interfere with another beam [40,41].…”

Section: Spatial Profiling Of the Third Harmonic Of Vortex Radiationmentioning

confidence: 99%

Spatial shaping of low- and high-order harmonics generated using vortex beams

Reddy,

Kim,

Kärcher

et al. 2024

J. Phys. D: Appl. Phys.

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We demonstrate the generation of the low- and high-order harmonic vortex beams from a single spiral phase plate (SPP) illuminated by different laser wavelengths. The second harmonic (532 nm) originates from the application of the wavefront-structured 1064 nm femtosecond pulses with fractional orbital angular momentum during propagation through a lithium triborate crystal, while the third harmonic (500 nm) originates from the application of the wavefront-structured near-IR (1500 nm) femtosecond pulses with integer orbital angular momentum during propagation through a 150 µm thick fused silica plate. The topological charges of the second and third harmonics are measured and compared. The increase in topological charge and the peculiarities in orbital angular momentum variations during modification of the polarisation of the incident radiation are analyzed and discussed. The two-color-pump-driven second-harmonic vortex radiation interacted with an Ar gas jet to generate vortex harmonics up to the 14th order with double-lobe complex spatial profiles in the extreme ultraviolet region.

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“…LG beams are mainly controlled and characterized by two parameters, that is, TC (l) and radial index (p) in the intensity distribution. The complex field distribution of LG beams propagating along the z direction can be expressed as [36], Here, j denotes the azimuthal phase, l is the azimuthal index, p is the radial index which describes the number of radial nodes in the intensity distribution. w(z) given by ( )…”

Section: Laguerre-gaussian Modesmentioning

confidence: 99%

Generation of structured light beams by dual phase modulation with a single spatial light modulator

Baliyan,

Shikder,

Nishchal

2023

Phys. Scr.

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Precise control of amplitude and wavefront of optical fields are prerequisites for many applications, especially in singular optics. This has led to the increasing efforts for developing efficient techniques to control the shape of the light in different dimensions. A spatial light modulator (SLM) can be efficiently used for phase-only or amplitude-only modulation; but offers limitation in complex light field modulation. Hence, shaping the complex amplitude of optical beams is challenging mainly because there are no complex modulators. While there is ongoing research to develop complex amplitude modulating SLMs, a solution is still non-existent. In this study, to achieve complex light modulations, a simple experimental set-up employing single phase-only SLM has been proposed. The SLM has been used as operating in a split-screen-mode. The non-iterative approach of dual-pass modulation has been applied where two cascaded phase value distributions (PVD) are encoded side-by-side onto the SLM. The first PVD is designed to enable amplitude modulation in the second PVD plane which finally helps achieve wavefront shaping. Hence, both amplitude and phase modulation of light beam are possible in this configuration. Commonly known singular beams such as Laguerre-Gaussian and Bessel-Gaussian modes have been generated theoretically as well as experimentally to verify the feasibility of the proposed technique. The method used helps to achieve arbitrary shaped beams as well.

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Self-referenced interferometry for single-shot detection of vector-vortex beams

Cited by 16 publications

References 69 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

Spatial shaping of low- and high-order harmonics generated using vortex beams

Generation of structured light beams by dual phase modulation with a single spatial light modulator

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