arXiv subjects

Dmitry A. Zimin

Publications and source records attributed to Dmitry A. Zimin.

7 recordsLinked to original sources

arXiv2026

Strong-field electro-optic sampling of light

We report the experimental realization of electro-optic sampling of light utilizing strong-field light-matter interaction. We show that in contrast to the perturbative regime where the non-linear signal (eg. sum-frequency generation) is localized at the narrowband spectrum that must match the local oscillator, the strong-field regime relies on the generation of a supercontinuum that automatically fulfills the overlaps with a local oscillator providing extremely broadband detection bandwidth. We develop a semi-classical model, benchmark it against the experiments with carrier-envelope-phase (CEP) stable sub-3 femtosecond pulses of octave-spanning bandwidth, and further validate it by a first-principle time-dependent density functional (TDDFT) theory. Our work establishes a simple electro-optic approach for investigating broadband high-frequency dynamics of matter on sub-cycle timescales with attosecond precision.

physics.optics↗

arXiv2026

Electric Field Resolved Image Formation in a Widefield Optical Microscope

Visualizing the spatiotemporal evolution of the electric field of light is fundamental to optics, from designing photonic devices to developing next-generation microscopes. However, we lack the experimental tools to directly access the electric field of light in the sample plane of an optical microscope. Here, we introduce an all-optical imaging modality that resolves the electric field of light in the plane of a traditional widefield transmission optical microscope with 100-attosecond temporal and 200-nanometer spatial resolution. With this we demonstrate the delayed buildup of scattering contrast and pulse broadening through and around a thick MoTe2 flake - dynamics inaccessible via standard simulations. We showcase our technique's versatility by additionally resolving the full in-plane vector electric field lines during photoexcitation as the optical pulse propagates through and around the MoTe2 flake.

physics.optics↗

arXiv2025

Plasmascopy of ultrafast hot charges in solids

We demonstrate an electric field-resolved approach for probing ultrafast dynamics of photoinjected charges in solids. Direct access to the electric field of few-cycle pulses enables us to measure a broadband response of a medium with associated plasma frequency. We prepare an ensemble of photoinjected hot charge carriers with energies sufficient to trigger impact ionization and establish a framework to measure its dynamics. Our study reveals the first time-resolved observation of the short-lived ultrafast impact ionization in germanium counteracted by trapping of mobile charges at later times. This approach provides a promising route for studying ultrafast many-body physics in photoexcited solids, with predictions from advanced theoretical models.

cond-mat.other↗

arXiv2025

Fieldoscopy at the Quantum Limit

We demonstrate a novel concept for measuring time-varying electric field transients of petahertz-scale photons down to a single-photon regime. We observe a clear transition from classical to quantum nature of light that agrees with our Monte Carlo model. We reach unprecedented yoctojoule-level sensitivity and a dynamic range exceeding 90 decibels. We utilize this capability to measure time-dependent intrapulse light coherence - a regime inaccessible to conventional, time-averaged spectroscopy. This opens new avenues for quantum information, cryptography, and quantum light-matter interactions on sub-cycle time scales with attosecond precision.

quant-ph↗

arXiv2023

Electric-field-resolved detection of localized surface plasmons at petahertz-scale frequencies

We present a novel electric-field-resolved approach for probing ultrafast dynamics of localized surface plasmons in metallic nanoparticles. The electric field of the broadband carrier-envelope-phase stable few-cycle light pulse employed in the experiment provides access to time-domain signatures of plasmonic dynamics that are imprinted on the pulse waveform. The simultaneous access to absolute spectral amplitudes and phases of the interacting light allows us obtaining a complex spectral response associated with localized surface plasmons. We benchmark our findings against the absorbance spectrum obtained with a spectrometer as well as the extinction cross-section modeled by a classical Mie scattering theory.

physics.optics↗

arXiv2021

Ultra-broadband photonic sampling of optical waveforms

Direct access to the electric field of light provides a subcycle view of the polarization response of matter, thus enabling sensitive metrology in physics, chemistry, and medicine. Optical-field sampling techniques take advantage of some process that lasts much less than an optical cycle of the measured light wave. Most of them rely on the generation of free electrons either by a weak extreme ultraviolet pulse or by a strong optical pulse. The ability of such techniques to detect weak signals is limited by undesirable effects associated with ionization. An alternative is all-optical methods, where the fast process is a nonlinear wave mixing. Such photonic methods may rely on extreme ultraviolet or optical pulses. They typically have better sensitivity, but smaller bandwidth. Here we propose generalized heterodyne optical-sampling techniques (GHOSTs), which overcome the bandwidth limit through controlling light-pulse waveforms.

physics.optics↗

arXiv2020

Transient optical gain in strong-field-excited solids

Multiphoton excitation of a solid by a few-cycle, intense laser pulse forms a very non-equilibrium distribution of charge carriers, where occupation probabilities do not necessarily decrease with energy. We show that, under certain conditions, significant population inversion can emerge between pairs of valence- or conduction-band states, where transitions between the Bloch states are dipole-allowed. This population inversion leads to stimulated emission in a laser-excited solid at frequencies where the unperturbed solid is transparent. We establish the optimal conditions for observing the strong-field-induced optical gain.

cond-mat.mes-hall↗