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A New Twist on Astigmatic Transformation: Beyond Laguerre-Gaussian Beams
Gabriela Flores-Cova, Bikash Kumar Das, Carmelo Rosales-Guzman +2
Astigmatic transformation is widely used to convert the azimuthal phase structure of Laguerre-Gaussian vortex beams into intensity patterns from which the topological charge can be…
Observation of Anomalous Orbital Angular Momentum Conservation in Parametric Nonlinearity
Hai-Jun Wu, Bing-Shi Yu, Jia-Qi Jiang +5
Orbital angular momentum (OAM) conservation plays an important role in shaping and controlling structured light with nonlinear optics. The OAM of a beam originating from three-wave…
Real-time superresolution interferometric measurement enabled by structured nonlinear optics
Xin-Yu Zhang, Hai-Jun Wu, Bing-Shi Yu +5
Optical interferometers are pillars of modern precision metrology, but their resolution is limited by the wavelength of the light source, which cannot be infinitely reduced. Magica…
DMD-based generation of vector beams through a common-path interferometer
Benjamin Perez-Garcia, Francisco Israel Mecillas Hernández, Carmelo Rosales-Guzmán
Complex vector modes of light, non-separable in their spatial and polarisation degrees of freedom, are revolutionising a wide variety of research fields. It is therefore not surpri…
Directly determining orbital angular momentum of ultrashort Laguerre-Gauss pulses via autocorrelation measurement
Bing-Shi Yu, Chun-Yu Li, Yuanjie Yang +2
Autocorrelation measurement based on second-harmonic generation (SHG), the best-known technique for measuring the temporal duration of ultrashort pulses, could date back to the bir…
Nonseparable states of light: From quantum to classical
Yijie Shen, Carmelo Rosales-Guzmán
Controlling the various degrees-of-freedom (DoFs) of structured light at both quantum and classical levels is of paramount importance in optics. It is a conventional paradigm to tr…
Propagation-invariant high-dimensional orbital angular momentum states
Li-Wei Mao, Dong-Sheng Ding, Carmelo Rosales-Guzmán +1
Photonic states encoded in spatial modes of paraxial light fields provide a promising platform for high-dimensional quantum information protocols and related studies, where several…
Frequency conversion of abruptly autofocusing waves
Wei Gao, Dong-Mei Wang, Hai-Jun Wu +3
Abruptly autofocusing waves and associated ring-Airy (RA) beams are attracting increasing interest owing to their fascinating properties such as their ability of abruptly autofocus…
Generation and characterization of complex vector modes with digital micromirror devices
Xiaobo Hu, Carmelo Rosales Guzman
Complex vector light modes with a spatial variant polarization distribution have become topical of late, enabling the development of novel applications in numerous research fields.…
Revealing the invariance of vectorial structured light in perturbing media
Isaac Nape, Keshaan Singh, Asher Klug +5
Optical aberrations have been studied for centuries, placing fundamental limits on the achievable resolution in focusing and imaging. In the context of structured light, the spatia…
Generation of tunable optical skyrmions on Skyrme-Poincaré sphere
Yijie Shen, Eduardo Casas Martínez, Carmelo Rosales-Guzmán
In recent time, the optical-analogous skyrmions, topological quasiparticles with sophisticated vectorial structures, have received an increasing amount of interest. Here we propose…
Parabolic-accelerating vector waves
Bo Zhao, Valeria Rodríguez-Fajardo, Xiao-Bo Hu +3
Complex vector light fields have become a topic of late due to their exotic features, such as their non--homogeneous transverse polarisation distributions and the non-separable cou…
High-speed generation of vector beams through random spatial multiplexing
Xiao-Bo Hu, Si-Yuan Ma, Carmelo Rosales-Guzmán
Complex vector modes have become topical of late due to their fascinating properties and the many applications they have found across a broad variety of research fields. Even thoug…
Experimental generation of Helical Mathieu-Gauss vector modes
Carmelo Rosales-Guzmán, Xiao-Bo Hu, ValeriaRodríguez-Fajardo +3
Vector modes represent the most general state of light in which, the spatial and polarisation degrees of freedom are coupled in a non-separable way. Crucially, while polarisation i…
Classically-entangled Ince-Gaussian modes
Yao-Li, Xiao-Bo Hu, Benjamin Perez-Garcia +4
Complex vector light modes, classically-entangled in their spatial and polarisation degrees of freedom (DoF), havebecome ubiquitous in a vast diversity of research fields. Cruciall…
Polarisation-insensitive generation of vector modes using a digital micromirror device
Carmelo Rosales-Guzman, Xiao-Bo Hu, Adam Selyem +4
In recent time there has been an increasing amount of interest in developing novel techniques for the generation of complex vector light beams. Amongst these, digital holography st…
All-Digital Stokes Polarimetry with a Digital Micro-mirror Device
Amogh Manthalkar, Isaac Nape, Najmeh Tabebordbar +4
Stokes polarimetry is widely used to extract the polarisation structure of optical fields, typically from six measurements, although it can be extracted from only four. To measure…
Radial modal transitions of Laguerre-Gauss modes during parametric upconversion: towards the full-field selection rule of spatial modes
Hai-Jun Wu, Li-Wei Mao, Yuan-Jie Yang +4
Optical orbital angular momentum transformation and corresponding azimuthal-mode selection rules have been studied exhaustively for various nonlinear optical interactions. However,…
Full characterization of spin-orbit coupled photons via spatial-Stokes measurement
Bing-Shi Yu, Hai-Jun Wu, Hao-Ran Yang +4
Characterization and analysis of spin-orbit coupled (SOC) states, as a measurement problem, play a vital role in research on the modern optics and photonics based on structured lig…
Does the structure of light influence the speckle size?
Xiao-Bo Hu, Meng-Xuan Dong, Zhi-Han Zhu +2
It is well known that when a laser is reflected from a rough surface or transmitted through a diffusive medium, a speckle pattern will be formed at a given observation plane. Speck…
In-situ detecting cooperative-target's speed and rotation inertia using structured light
Xiao-Bo Hu, Bo-Zhao, Zhi-Han Zhu +2
Laser remote sensing represents a powerful tool that enables the accurate measurement of the speed of moving targets. Crucially, most sensing techniques are 2-Dimensional and only…
Structured light by discrete-phase orbital angular momentum holograms
A. Vijayakumar, Carmelo Rosales-Guzman, Mani Ratnam Rai Joseph Rosen +3
Structured light has been created by a myriad of near- and far-field techniques and has found both classical and quantum applications. In the case of orbital angular momentum (OAM)…
Observation of local entanglement oscillation in free space
Eileen Otte, Carmelo Rosales-Guzmán, Bienvenu Ndagano +2
It is well known that the entanglement of a quantum state is invariant under local unitary transformations. It dictates, for example, that the degree of entanglement of a photon pa…
Creation and characterization of vector vortex modes for classical and quantum communication
Bienvenu Ndagano, Isaac Nape, Mitchell A. Cox +2
Vector vortex beams are structured states of light that are non-separable in their polarisation and spatial mode, they are eigenmodes of free-space and many fibre systems, and have…