Vectorized optoelectronic control and metrology in a semiconductor

Sederberg, Shawn; Kong, Fanqi; Hufnagel, Felix; Zhang, Chunmei; Karimi, Ebrahim; Corkum, P. B.

doi:10.1038/s41566-020-0690-1

Cited by 85 publications

(51 citation statements)

References 42 publications

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“…T opology of complex electromagnetic fields is attracting growing interest of the photonics and electromagnetics communities [1][2][3][4][5] , while topologically structured light fields find applications in super-resolution microscopy 6 , metrology 7,8 , and beyond 9,10 . For example, the vortex beam with twisted phase, akin to a Mobius strips in phase domain, can carry orbital angular momentum with tunable topological charges enabling advanced applications of optical tweezers, machining, and communications [9][10][11][12] .…”

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confidence: 99%

Supertoroidal light pulses as electromagnetic skyrmions propagating in free space

et al. 2021

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Topological complex transient electromagnetic fields give access to nontrivial light-matter interactions and provide additional degrees of freedom for information transfer. An important example of such electromagnetic excitations are space-time non-separable single-cycle pulses of toroidal topology, the exact solutions of Maxwell’s equations described by Hellwarth and Nouchi in 1996 and recently observed experimentally. Here we introduce an extended family of electromagnetic excitation, the supertoroidal electromagnetic pulses, in which the Hellwarth-Nouchi pulse is just the simplest member. The supertoroidal pulses exhibit skyrmionic structure of the electromagnetic fields, multiple singularities in the Poynting vector maps and fractal-like distributions of energy backflow. They are of interest for transient light-matter interactions, ultrafast optics, spectroscopy, and toroidal electrodynamics.

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confidence: 99%

Supertoroidal light pulses as electromagnetic skyrmions propagating in free space

et al. 2021

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“…Afterward, the obtainable superimposed beams after tight focusing impinge onto the nonabsorbing isotropic MO material (i.e., DyFeO 3 , [75] GdFeCo, [1,17] or YMnO 3 [76] ). At last, we can reconstruct and reveal the 3D-twisted and polarizationtunable magnetization textures by leaning upon the magnetic tomography technique, similar to neutron tomography, [77] electron tomographic reconstruction, [78,79] and X-ray tomography. [69] In conclusions, based on the vectorial diffraction theory and the inverse Faraday effect, we have proposed and presented an efficient and easy-to-implement approach for the all-optical generation of subdiffraction-limited (<0.5λ) magnetization with successively tunable polarization orientations and spatially controllable twisting manifolds.…”

Section: Discussionmentioning

confidence: 99%

Twisting Polarization‐Tunable Subdiffraction‐Limited Magnetization through Vectorial Beam Coupling

Liu

Yan

Liang

et al. 2021

Advanced Photonics Research

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Light-induced switching and manipulation of the magnetization in magneto-optical (MO) materials has enjoyed continuous growing interests due to its potential alluring applications, such as all-optical magnetic recording/storage, [1][2][3][4] magnetic resonance microscopy, [5,6] atom trapping, [7,8] and magnetic holography, [9,10] among other feats. In particular, according to the prediction by International Data Corporation, the total data amount generated globally will reach up to 160ZB (1ZB ¼ 10 12 GB) by the year 2025. [11,12] Such a vast quantity of data elicits an urge to develop bran-new magnetization-based storage technologies. In these contexts, the inverse Faraday effect (IFE) first pioneered in the 1960s has revived as a mainstream leading mechanism giving insights into diverse optomagnetic phenomena, [13][14][15] principally because the light fields tailored either by amplitude/ phase/polarization modulator or by spin/ orbital angular momentum generator could couple strongly with the engineered magnetic systems. [16][17][18][19][20][21] Whereupon a variety of light-triggered subdiffraction-scale versatile magnetization fields with tunable polarization orientations and exotic spatial textures can be achieved by leveraging the canonical IFE, which holds the key for most applications, especially for high-density and low-energy consumption optomagnetic storage. Unlike the circularly polarized beam excitation, [22,23] the well-engineered vectorial beams under tight focusing are able to produce not only purely longitudinal subdiffractionlimited magnetization but also high-purity transverse magnetization, [24,25] which would foster vast opportunities for

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“…Structured light beams have emerged as a versatile tool for a wide range of applications [ 1 , 2 , 3 ]. In particular, light beams manifesting Orbital Angular Momentum (OAM) [ 4 ] have propelled exciting new developments in the field of optical communication and quantum information [ 5 , 6 , 7 , 8 ], super-resolution microscopy [ 9 , 10 ], optical trapping and tweezing [ 11 , 12 ], material processing [ 13 , 14 ], astronomy [ 15 , 16 ], induction of topological current in semiconductors [ 17 , 18 ], and light–matter interaction [ 19 , 20 , 21 , 22 ]. These helically-phased beams, also known as optical vortices (OV), are characterized by their twisted wavefront resulting from an azimuthally varying phase given by

around the beam propagation axis [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Shack-Hartmann Wavefront Sensing of Ultrashort Optical Vortices

Pandey

Larrieu

Dovillaire

et al. 2021

Sensors

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Light beams carrying Orbital Angular Momentum (OAM), also known as optical vortices (OV), have led to fascinating new developments in fields ranging from quantum communication to novel light–matter interaction aspects. Even though several techniques have emerged to synthesize these structured-beams, their detection, in particular, single-shot amplitude, wavefront, and modal content characterization, remains a challenging task. Here, we report the single-shot amplitude, wavefront, and modal content characterization of ultrashort OV using a Shack-Hartmann wavefront sensor. These vortex beams are obtained using spiral phase plates (SPPs) that are frequently used for high-intensity applications. The reconstructed wavefronts display a helical structure compatible with the topological charge induced by the SPPs. We affirm the accuracy of the optical field reconstruction by the wavefront sensor through an excellent agreement between the numerically backpropagated and experimentally obtained intensity distribution at the waist. Consequently, through Laguerre–Gauss (LG) decomposition of the reconstructed fields, we reveal the radial and azimuthal mode composition of vortex beams under different conditions. The potential of our method is further illustrated by characterizing asymmetric Gaussian vortices carrying fractional average OAM, and a realtime topological charge measurement at a 10Hz repetition rate. These results can promote Shack-Hartmann wavefront sensing as a single-shot OV characterization tool.

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Vectorized optoelectronic control and metrology in a semiconductor

Cited by 85 publications

References 42 publications

Supertoroidal light pulses as electromagnetic skyrmions propagating in free space

Supertoroidal light pulses as electromagnetic skyrmions propagating in free space

Twisting Polarization‐Tunable Subdiffraction‐Limited Magnetization through Vectorial Beam Coupling

Shack-Hartmann Wavefront Sensing of Ultrashort Optical Vortices

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