Dynamic Population Difference Gratings and Microcavities Induced by Extremely Short Pulses: Recent Advances and Future Prospects (Mini-review)

JETP Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Language: Английский

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Towards field-resolved visible microscopy of 2D materials

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Abstract The investigation of interaction light with various materials on the sub-cycle time scale requires field sampling techniques incredibly high temporal resolution. Electro-optic (EOS) provides sub-wavelength resolution both in and space giving opportunity for ultrafast microscopy to observe response electrons quasiparticles real time. For frequencies approaching petahertz scale, oscillations are hard resolve. In particular, EOS has not been demonstrated wavelengths below 700 nm. this perspective, we discuss potential extension cover complete visible spectrum impact that it can give nanophotonics material science. Specifically, describe how dynamics some 2D be tracked using space-resolved EOS.

Language: Английский

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Bandwidth of Lightwave-Driven Electronic Response from Metallic Nanoantennas

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 24, 2025

Lightwave electronics offer transformative field-level precision and control at high optical frequencies. While recent advances show that lightwave-driven electron emission from nanoantennas enables time-domain, field-resolved analysis of waveforms through a small-signal analysis, the effect gate waveform on measurement transfer function remains unexplored. By generating electrons with 10-cycle pulse in tunneling regime perturbing response 1.5-cycle pulse, we experimentally measure bandwidth limitations imposed by process. comparing these measurements TDSE simulations analytical models, reveal temporal properties electronic its impact function. Our results test confirm accuracy Fowler–Nordheim model estimating lightwave noble metals. We envision extending techniques to multi-octave-spanning signals for precise characterization sub-cycle responses harmonic frequency mixing.

Language: Английский

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Femtosecond Optical-Field-Driven Currents in Few-Nanometer-Size Gaps with Hot Electron Injection into Metallic Leads

ACS Photonics, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Current nanoscale optoelectronic devices can reach femtosecond response times by exploiting highly nonlinear light–matter interactions. Shaping of the field waveform few-cycle optical pulses allows one to control electron emission from nanotips and nanoparticles as well drive transport in ≳10 nm wide plasmonic gaps. In this work, we address less explored optically induced much narrower, 1–2 metallic gaps interest many practical situations such light-wave-driven scanning tunneling microscopy or transduction between electrons photons for applications. Using time-dependent density functional theory, model calculations, semi-classical trajectories derived an analytical strong-field model, bring robust evidence that sub-cycle bursts photoemitted might cross gap prior change sign thus without experiencing quiver motion. This leads a characteristic carrier-envelope phase dependence net transport. Most importantly, show regime, continuous acceleration moving results high energies. The current narrow-gap nanocircuit is then associated with hot injection into characterized non-thermal post-injection energy distribution. contrast through dominated low-energy electrons. Our contribute design operating on temporal nanometer spatial scales.

Language: Английский

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Few-cycle Yb-doped laser sources for attosecond science and strong-field physics

APL Photonics, Journal Year: 2025, Volume and Issue: 10(4)

Published: April 1, 2025

Yb-doped laser amplifiers have, in recent years, found applications attosecond science, driven largely by the opportunities associated with high-average-power and high-repetition-rate sources. In this Perspective article, we outline advances upcoming pulse generation measurements based on amplifiers.

Language: Английский

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