Reconfigurable electronic circuits for magnetic fields controlled by structured light

Jana, Kamalesh; Herperger, Katherine R.; Kong, Fanqi; Mi, Yonghao; Zhang, C.; Corkum, P. B.; Sederberg, Shawn

doi:10.1038/s41566-021-00832-9

Cited by 38 publications

(29 citation statements)

References 35 publications

(39 reference statements)

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“…Coherent control is a powerful tool with applications in a wide range of areas such as quantum optics and metrology [6][7][8], attosecond metrology [9,10], optoelectronics [11] and laser cooling [12,13]. In recent studies [2][3][4][5], steering the direction of electron current was achieved by controlling the quantum interference of excitation or ionization pathways resulting from a mid-IR ω pulse and its second harmonic 2ω [2]. The phase delay of the two pulses was shown to control interference between the two-photon (ω) and single-photon (2ω) pathways and to finally determine the direction of electron motion [2].…”

Section: Introductionmentioning

confidence: 99%

Mapping the direction of electron ionization to phase delay between VUV and IR laser pulses

Mountney,

Katsoulis,

Møller

et al. 2022

Preprint

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Section: Introductionmentioning

confidence: 99%

Mapping the direction of electron ionization to phase delay between VUV and IR laser pulses

Mountney,

Katsoulis,

Møller

et al. 2022

Preprint

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“…Because coherent control is sensitive to the relative phase between two laser fields, it is also interesting to introduce phase structure to one or both of the laser beams to spatially address currents in the semiconductor. Sculpting the phase fronts of one of the beams using a spatial light modulator (SLM) provided a means to independently program the vector of hundreds of current elements excited in the semiconductor [ 46 ].…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable terahertz metasurfaces coherently controlled by wavelength-scale-structured light

et al. 2021

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Structuring light–matter interaction at a deeply subwavelength scale is fundamental to optical metamaterials and metasurfaces. Conventionally, the operation of a metasurface is determined by the collective electric polarization response of its lithographically defined structures. The inseparability of electric polarization and current density provides the opportunity to construct metasurfaces from current elements instead of nanostructures. Here, we realize metasurfaces using structured light rather than structured materials. Using coherent control, we transfer structure from light to transient currents in a semiconductor, which act as a source for terahertz radiation. A spatial light modulator is used to control the spatial structure of the currents and the resulting terahertz radiation with a resolution of 5.6 ± 0.8 μm $5.6\pm 0.8\mathrm{\,\mu m}$ , or approximately λ / 54 $\lambda /54$ at a frequency of 1 THz. The independence of the currents from any predefined structures and the maturity of spatial light modulator technology enable this metasurface to be reconfigured with unprecedented flexibility.

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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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Reconfigurable electronic circuits for magnetic fields controlled by structured light

Cited by 38 publications

References 35 publications

Mapping the direction of electron ionization to phase delay between VUV and IR laser pulses

Mapping the direction of electron ionization to phase delay between VUV and IR laser pulses

Reconfigurable terahertz metasurfaces coherently controlled by wavelength-scale-structured light

Shack-Hartmann Wavefront Sensing of Ultrashort Optical Vortices

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