Michael Chini
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View article: Efficient generation and extreme compression of multidimensional solitary states in molecular gas-filled hollow-core fibers driven by picosecond Yb lasers
Efficient generation and extreme compression of multidimensional solitary states in molecular gas-filled hollow-core fibers driven by picosecond Yb lasers Open
We present an in-depth study on the impact of spatiotemporal Raman enhancement in molecular gas-filled hollow-core fibers (HCFs), demonstrating the efficient generation and post-compression of multidimensional solitary states (MDSS). Throu…
View article: Few-cycle Yb-doped laser sources for attosecond science and strong-field physics
Few-cycle Yb-doped laser sources for attosecond science and strong-field physics Open
Yb-doped laser amplifiers have, in recent years, found applications in attosecond science, driven largely by the opportunities associated with high-average-power and high-repetition-rate attosecond sources. In this Perspective article, we …
View article: Scanless laser waveform measurement in the near-infrared
Scanless laser waveform measurement in the near-infrared Open
Field-resolved measurements of few-cycle laser waveforms allow access to ultrafast electron dynamics in light–matter interactions and are key to future lightwave electronics. Recently, sub-cycle gating based on nonlinear excitation in acti…
View article: Carrier-envelope phase-stable few-cycle pulses from two stage hybrid compression of a Yb:KGW amplifier
Carrier-envelope phase-stable few-cycle pulses from two stage hybrid compression of a Yb:KGW amplifier Open
Next-generation attosecond spectroscopies require high-repetition-rate driving lasers with few-cycle pulse duration, stable carrier-envelope phase (CEP), and ease of operation. Industrial-grade Yb-doped solid-state regenerative amplifiers …
View article: Roadmap on basic research needs for laser technology
Roadmap on basic research needs for laser technology Open
Motivated by the profound impact of laser technology on science, arising from an increase in focused light intensity by seven orders of magnitude and flashes so short electron motion is visible, this roadmap outlines the paths forward in l…
View article: Field-resolved space–time characterization of few-cycle structured light pulses
Field-resolved space–time characterization of few-cycle structured light pulses Open
Accompanied by the rapid development of ultrafast laser platforms in recent decades, the spatiotemporal manipulation of ultrashort laser pulses has attracted much attention due to the potential for cutting-edge applications of structured l…
View article: DOE Support for the 8th International Conference on Attosecond Science (Final Technical Report)
DOE Support for the 8th International Conference on Attosecond Science (Final Technical Report) Open
The 8th International Conference on Attosecond Science and Technology (ATTO VIII) was held on the campus of the University of Central Florida in Orlando, FL from July 10-16, 2022. The main objectives of the conference were (i) to outline t…
View article: Proceedings of the 8th International Conference on Attosecond Science and Technology
Proceedings of the 8th International Conference on Attosecond Science and Technology Open
This volume brings together selected papers from the 8th International Conference on Attosecond Science and Technology which took place in Orlando, ...
View article: Light-field synthesizer based on multidimensional solitary states in hollow-core fibers
Light-field synthesizer based on multidimensional solitary states in hollow-core fibers Open
Few-cycle, long-wavelength sources for generating isolated attosecond soft x ray pulses typically rely upon complex laser architectures. Here, we demonstrate a comparatively simple setup for generating sub-two-cycle pulses in the short-wav…
View article: Single-shot measurement of few-cycle optical waveforms on a chip
Single-shot measurement of few-cycle optical waveforms on a chip Open
The measurement of transient optical fields has proven critical to understanding the dynamical mechanisms underlying ultrafast physical and chemical phenomena, and is key to realizing higher speeds in electronics and telecommunications. Co…
View article: Thermal effects in molecular gas-filled hollow-core fibers
Thermal effects in molecular gas-filled hollow-core fibers Open
Few-cycle sources with high average powers are required for applications to attosecond science. Raman-enhanced spectral broadening of Yb-doped laser amplifiers in molecular gases can yield few-cycle pulses, but thermal excitation of vibrat…
View article: All-optical sampling of few-cycle infrared pulses using tunneling in a solid
All-optical sampling of few-cycle infrared pulses using tunneling in a solid Open
Recent developments in ultrafast laser technology have resulted in novel few-cycle sources in the mid-infrared. Accurately characterizing the time-dependent intensities and electric field waveforms of such laser pulses is essential to thei…
View article: Supplementary document for Thermal Effects in Molecular Gas-Filled Hollow-Core Fibers - 5182673.pdf
Supplementary document for Thermal Effects in Molecular Gas-Filled Hollow-Core Fibers - 5182673.pdf Open
Supplemental Document
View article: Multioctave supercontinuum generation and frequency conversion based on rotational nonlinearity
Multioctave supercontinuum generation and frequency conversion based on rotational nonlinearity Open
Molecular gases enable extreme compression of industrial-grade lasers, providing a more accessible platform for attosecond science.
View article: Extreme ultraviolet time- and angle-resolved photoemission setup with 21.5 meV resolution using high-order harmonic generation from a turn-key Yb:KGW amplifier
Extreme ultraviolet time- and angle-resolved photoemission setup with 21.5 meV resolution using high-order harmonic generation from a turn-key Yb:KGW amplifier Open
Characterizing and controlling electronic properties of quantum materials require direct measurements of nonequilibrium electronic band structures over large regions of momentum space. Here, we demonstrate an experimental apparatus for tim…
View article: Multi-Octave Supercontinuum Generation and Frequency Conversion based on Rotational
Multi-Octave Supercontinuum Generation and Frequency Conversion based on Rotational Open
The field of attosecond science was first enabled by nonlinear compression of intense laser pulses to a duration below two optical cycles. Twenty years later, creating such short pulses still requires state-of-the-art few-cycle laser ampli…
View article: Crystal symmetry and polarization of high-order harmonics in ZnO
Crystal symmetry and polarization of high-order harmonics in ZnO Open
We carried out a joint theoretical and experimental study of the polarization of high-order harmonics generated from ZnO by intense, linearly-polarized, infrared laser pulses. Experimentally we found that the dependence of parallel and per…
View article: Time- and Angle-Resolved Photoemission Spectroscopy using an Ultrafast Extreme Ultraviolet Source at 21.8 eV
Time- and Angle-Resolved Photoemission Spectroscopy using an Ultrafast Extreme Ultraviolet Source at 21.8 eV Open
Characterizing and controlling electronic properties of quantum materials require direct measurements of non-equilibrium electronic band structures over large regions of momentum space. Here, we demonstrate an experimental apparatus for ti…
View article: 33-fold pulse compression down to 1.5 cycles in a 6m long hollo-core fiber
33-fold pulse compression down to 1.5 cycles in a 6m long hollo-core fiber Open
We demonstrate 33-fold pulse compression employing a 6-m-long hollow-core fiber and chirped mirrors. 1 mJ, 170 fs pulses at 1030 nm are compressed to 5.1 fs (1.5 optical cycles) with 70% efficiency.
View article: Direct compression of 170-fs 50-cycle pulses down to 1.5 cycles with 70% transmission
Direct compression of 170-fs 50-cycle pulses down to 1.5 cycles with 70% transmission Open
We present a straightforward route for extreme pulse compression, which relies on moderately driving self-phase modulation (SPM) over an extended propagation distance. This avoids that other detrimental nonlinear mechanisms take over and d…
View article: High-harmonic generation in ZnO driven by self-compressed mid-infrared pulses
High-harmonic generation in ZnO driven by self-compressed mid-infrared pulses Open
Progress in attosecond science has relied on advancements in few-cycle pulse generation technology and its application to high-order harmonic generation. Traditionally, self-phase modulation in bulk solids has been used for the compression…
View article: High-harmonic generation in amorphous solids
High-harmonic generation in amorphous solids Open
High-harmonic generation in isolated atoms and molecules has been widely utilized in extreme ultraviolet photonics and attosecond pulse metrology. Recently, high-harmonic generation has been observed in solids, which could lead to importan…
View article: Laser waveform control of extreme ultraviolet high harmonics from solids
Laser waveform control of extreme ultraviolet high harmonics from solids Open
Solid-state high-harmonic sources offer the possibility of compact, high-repetition-rate attosecond light emitters. However, the time structure of high harmonics must be characterized at the sub-cycle level. We use strong two-cycle laser p…
View article: 53 Attosecond X-ray Pulses Glancing Through the Water Window
53 Attosecond X-ray Pulses Glancing Through the Water Window Open
53 attosecond X-ray pulses with photon energies up to 300 eV are generated using polarization gated CEP-stable two-cycle pulses around 1.8 μm and characterized using photoelectron streaking technique combined with the PROOF retrieval metho…