Broadband Photoconductive Sampling in Gallium Phosphide

Altwaijry, Najd; Qasim, Muhammad; Mamaikin, Mikhail; Schötz, Johannes; Golyari, K.; Heynck, Michael; Ridente, Enrico; Yakovlev, Vladislav S.; Karpowicz, Nicholas; Kling, Matthias F.

doi:10.1002/adom.202202994

Cited by 4 publications

(3 citation statements)

References 40 publications

(52 reference statements)

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“…2(b,c). This highlights the exceptional properties of 2D materials for light-field control applications and marks them being suitable for CEP detecting applications as for example spatial 3D CEP scanning [23] or for nonlinear photoconductive sampling [13]. Here, the question arises: what is the mechanism of the ultrafast current generation in metals?…”

Section: Methodsmentioning

confidence: 99%

“…The light-field is usually controlled by stabilizing the so-called carrier-envelope phase (CEP) of few-cycle laser pulses. Using the CEP-stabilized laser sources the light-field control over the PHz currents has been achieved in various media such as gases [6], wide bandgap materials as dielectrics [5,7,8], semiconductors [8][9][10][11], and 2D materials [12,13]. The progress in this field of lightwave electronics inspires ideas for PHz optoelectronic components such as logic gates, memories or waveguide integrations [12,14,15].…”

Section: Introductionmentioning

confidence: 99%

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Light-Field-Controlled PHz Currents in Metals

Fehér,

Hanus,

et al. 2024

Preprint

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Oriented electric currents in metals are routinely driven by applying an external electric potential. Although the response of electrons to the external electric fields occurs within attoseconds, conventional electronics do not utilize this speed potential. Ultrafast laser technology, which delivers laser pulses with controlled shapes of electric fields that switch direction at PHz frequencies, opens new perspectives for driving electric currents in metals. Here, we demonstrate an interaction of light with nm-thick metallic layers, that leads to a generation of PHz-bandwidth electric currents, providing evidence that currents in metals can be optically controlled. We show that the implantation of metallic layers into a dielectric matrix leads up to 40 times increase of the sensitivity in contrast to bare dielectric, decreasing the intensity threshold for the lightwave electronics. We establish a link between electronic and optical properties by identifying an empirical relationship between the index of nonlinear susceptibility X(3) and the generated current. We provide an intraband-motion model elucidating the origin of the measured current.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Light-Field-Controlled PHz Currents in Metals

Fehér,

Hanus,

et al. 2024

Preprint

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“…[18] These constraints drive the development of new technologies requiring low pulse energies, e.g., frameworks that exploit field enhancement in nanostructures [3] or devices analogous to the Auston switch. [18,24] Figure 1. a) NPS measurement setup.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement in Photoconductive Light Field Sampling

Altwaijry,

Qasim,

Zimin

et al. 2024

Advanced Optical Materials

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The emerging field of lightwave electronics is driving optoelectronic information processing beyond current classical limitations and has the potential to eventually reach petahertz frequencies. One of the major obstacles in reaching not only higher switching frequencies but also higher repetition rates with low‐power light sources is the efficiency of related devices. A device is presented based on a multilayered material that shows a 13‐fold enhancement in terms of converting light to electric current compared to bulk solids. Furthermore, the device exhibits an almost flat intensity response within its working range. The outstanding properties of engineered multilayered devices promise to push technology for lightwave electronics applications.

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Open source, heterogeneous, nonlinear optics simulation

Karpowicz

2023

Opt. Continuum

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The spatio-temporal evolution of a laser field taking part in a nonlinear optical interaction can be challenging to simulate, yet forms the basis for many experiments in ultrafast optics. To allow better insight into these phenomena, a program for nonlinear optics simulations is described, which can run on multiple hardware platforms, and is performant and open source. It was designed to deal with a number of complex problems in light-matter interaction accurately and reproducibly. The open source code allows for extensive cross-checking of its results by other researchers and growth of its capabilities over time, as well as serving to make the simulations associated with ultrafast experiments more broadly reproducible.

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Broadband Photoconductive Sampling in Gallium Phosphide

Abstract: Figure 4. a) EOS (in red) and b) LPS (in blue) spectral response functions calculated with different GDD values applied to the VIS-UV pulse. c) EOS response calculated for a compressed VIS-UV pulse and different crystal thicknesses.

Cited by 4 publications

References 40 publications

Light-Field-Controlled PHz Currents in Metals

Light-Field-Controlled PHz Currents in Metals

Sensitivity Enhancement in Photoconductive Light Field Sampling

Open source, heterogeneous, nonlinear optics simulation

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