Article
Optics
Apostolos Zdagkas, Venkatram Nalla, Nikitas Papasimakis, Nikolay I. Zheludev
Summary: Ultrafast vectorially polarized pulses with strong longitudinal components and space-polarization non-separability have wide applications, but their pulse propagation dynamics are significantly influenced by space-time couplings. A new method combining spatially resolved Fourier transform spectroscopy and Mach-Zehnder interferometry can characterize the spatiotemporal properties of ultrashort cylindrical vector pulses. This method provides access to spatially resolved spectral amplitudes and phases of all polarization components of the pulse.
Article
Optics
Shengjun Yue, Shan Xue, Hongchuan Du, Manfred Lein
Summary: When an atom is ionized by a strong laser pulse, the Coulomb force causes the outgoing electron to slow down, requiring an earlier release into the accelerating field to compensate. Using numerical models, it is possible to measure this subtle time shift accurately.
Article
Optics
Qili Tian, Hanxun Xu, Yi Wang, Yifan Liang, Yuemei Tan, Xiaonan Ning, Lixin Yan, Yingchao Du, Renkai Li, Jianfei Hua, Wenhui Huang, Chuanxiang Tang
Summary: The study demonstrates an efficient method for generating high-field terahertz (THz) pulse train in congruent lithium niobate (LN) crystals driven by temporally shaped laser pulses. It successfully achieved narrowband THz pulses with sub-percent level conversion efficiency and multi MV/cm peak field, showing potential for generating mJ-level narrow-band THz pulse trains with further improvements in conversion efficiency using smaller pump beam sizes.
Article
Optics
Pavel Peterka, Artur O. Slobodeniuk, Tomas Novotny, Pawan Suthar, Miroslav Bartos, Frantisek Trojanek, Petr Maly, Martin Kozak
Summary: We experimentally investigate nonperturbative high harmonic generation (HHG) in monolayer MoS2 in the ultraviolet spectral region driven by mid-infrared light. The HHG is influenced by pre-excitation of the monolayer using resonant and near-resonant pulses. The presence of pre-excited carriers suppresses HHG due to ultrafast dephasing caused by electron-electron scattering. Near-resonant excitation with photon energy below the exciton transition shows a fast component in the suppression of HHG yield, which is a consequence of momentum scattering at carriers excited by two-photon transition.
Article
Optics
Miguel Lopez-Ripa, Inigo J. Sola, Benjamin Alonso
Summary: This study presents a simple, compact, and ultra-stable spatiotemporal characterization technique based on bulk lateral shearing spectral interferometry using a birefringent uniaxial crystal, which allows for accurate measurement of ultrashort laser beams and retrieval of complex spatiotemporal structures of ultrafast optical vortices.
PHOTONICS RESEARCH
(2022)
Article
Multidisciplinary Sciences
D. N. Makarov, K. A. Makarova, A. A. Kharlamova
Summary: This article introduces the interaction characteristics between ultrashort laser pulses and complex molecular structures, and proposes a scattering theory applicable to such substances. Examples of the scattering spectra of DNA and RNA are presented. The developed theory is more general in the scattering theory and can transition into the previously known one when the duration of the ultrashort laser pulses is considered sufficiently long.
SCIENTIFIC REPORTS
(2022)
Article
Optics
J. M. Ngoko Djiokap, A. Meremianin, N. L. Manakov
Summary: This study examines the formation of interference patterns in the photoelectron momentum distributions resulting from the photoionization of atoms by two single-color, crossing ultrashort pulses. The patterns differ depending on the type of pulses used, with distinct regular patterns occurring under specific conditions. These findings are expected to be applicable to the ionization of any randomly oriented atomic or molecular target.
Review
Biochemistry & Molecular Biology
Friederike Cuello, Friedrich W. Herberg, Konstantina Stathopoulou, Philipp Henning, Simon Diering
Summary: Pathologies such as cancer, inflammatory and cardiac diseases are often associated with long-term oxidative stress, leading to protein dysfunction and failed trials of systemic antioxidant therapy. In cardiac myocytes, cardiac contractility is mainly driven by the beta-adrenoceptor-signaling cascade activating PKA-mediated phosphorylation for positive inotropic and lusitropic effects. Both kinase and phosphatase are redox-sensitive and play crucial roles in regulating cardiac contractile function.
Article
Chemistry, Physical
M. Zukerstein, J. Hrabovsky, J. Sladek, I Mirza, Y. Levy, N. M. Bulgakova
Summary: Tubular structures and microneedles can be formed on monocrystalline silicon surface using ultrashort laser pulses. The height and morphology of the structures can be controlled by single and multi-pulsed irradiation, and the mechanisms responsible for their formation are discussed. The generated silicon microtubes and needles have applications in various fields.
APPLIED SURFACE SCIENCE
(2022)
Article
Optics
Chen Guo, Miguel Miranda, Ann-kathrin Raab, Anne-lise Viotti, Paulo tiago Guerreiro, Rosa Romero, Helder Crespo, Anne L'Huillier, Cord l. Arnold
Summary: We propose a single-shot measurement scheme for the carrier-envelope phase offset of ultrashort laser pulses, which can achieve high-repetition rate. The carrier-envelope phase is evaluated optically through the spectral fringes produced by f-2f nonlinear interferometry. The experimental results show excellent agreement with the simultaneous measurement using a fast line-scan camera.
Article
Optics
Miguel Lopez-Ripa, Inigo J. Sola, Benjamin Alonso
Summary: This work explores the application of the amplitude modulation concept in the temporal characterization of ultrashort laser pulses. The effects of different types of relative amplitude and phase modulations are studied theoretically and numerically. It is demonstrated that rotating zero-order waveplates can be used to manipulate the replicas of delayed pulses, making the proposed schemes practical and versatile. Experimental validation on compressed and chirped pulses confirms the applicability of this ultrashort pulse measurement, benefiting the field of ultrafast optics.
Article
Optics
Zhongjun Jiang, Wei He, Jingwei Chen, Kai Jiang, Shuaichao Li, Liang Wang
Summary: This article presents an antenna-free plasmonic lithography technique using high numerical aperture objectives as the scanning head, which can achieve lithography at the sub-wavelength scale. The method has the advantages of small minimum feature size and low cost, and can serve as a candidate for laser processing at the sub-wavelength scale, offering a truly convenient and economical way of nano-patterning.
Article
Multidisciplinary Sciences
A. E. Khramova, M. Kobecki, I. A. Akimov, I. Savochkin, M. A. Kozhaev, A. N. Shaposhnikov, V. N. Berzhansky, A. K. Zvezdin, M. Bayer, V. Belotelov
Summary: This study demonstrates a new method for tuning the excitation of different spin wave modes in magnetic microdisks. By using a high repetition rate of laser pulses, an interplay between spin wave resonances in the frequency and momentum domains is established. Additionally, a switching between volume and surface spin waves is achieved through small variations of the external magnetic field.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Yang Qingyu, Wang Yubo, Tian Youwei
Summary: The properties of nonlinear inverse Thomson scattering (NITS) were investigated through numerical simulations. It was found that the asymmetric effect of the laser field on off-axis electrons caused a torque on their trajectory and destroyed the symmetry of the spatial radiation, resulting in radiation concentration in the off-axis direction. Increasing laser intensity enhanced the torsion effect, improved radiation collimation, and shifted the direction sideways. Increasing the initial energy of the electrons reversed the direction to backwards and decreased the off-axis effect. In both cases, the power exponentially increased, the pulse width shortened, the spectrum broadened, and super-continuity appeared.
Article
Optics
Mayank Kumar, Maghsoud Arshadipirlar, Reza Safaei, Heide Ibrahim, Francois Legare
Summary: In this study, we demonstrate the generation of multidimensional solitary states (MDSS) using a nitrous oxide-filled hollow core fiber (HCF) and femtosecond pulses from a Titanium:Sapphire chirped pulsed amplifier. The output consists of broadband, red-shifted spectrum with negative quadratic spectral phase, resulting in the generation of sub-30 fs pulses. Experimental observations and simulations show that the sign of frequency chirp of input pulses affects the spectral broadening in the HCF. The MDSS red-shifted pulses have a clean spatial profile, relaxing the experimental requirements for achieving a clean MDSS beam profile in large core HCFs.
Meeting Abstract
Biophysics
Federica Castellani, Esin B. Sozer, P. Thomas Vernier
BIOPHYSICAL JOURNAL
(2019)
Article
Biochemistry & Molecular Biology
Esin B. Sozer, P. Thomas Vernier
BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES
(2019)
Review
Physics, Fluids & Plasmas
Martin Gundersen, P. Thomas Vernier, Stephen B. Cronin, Sanjana Kerketta
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2020)
Article
Biochemistry & Molecular Biology
Nadica Ivosevic DeNardis, Galja Pletikapic, Ruza Frkanec, Lucija Horvat, P. Thomas Vernier
BIOELECTROCHEMISTRY
(2020)
Article
Biophysics
Esin B. Sozer, Sourav Haldar, Paul S. Blank, Federica Castellani, P. Thomas Vernier, Joshua Zimmerberg
BIOPHYSICAL JOURNAL
(2020)
Article
Biophysics
Josette Zaklit, Gale L. Craviso, Normand Leblanc, P. Thomas Vernier, Esin B. Sozer
Summary: The cellular effects of nanosecond-pulsed electric field exposures can be attenuated by bipolar pulse cancellation using equal duration and amplitude positive and negative phases, with response restoration achieved through appropriate interphase intervals. The modulation of Ca2+ responses in neural-type cells with ultrashort pulses demonstrates the potential for using nanosecond bipolar pulse technologies for neuromodulation applications.
BIOPHYSICAL JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Esin B. Sozer, Andrei G. Pakhomov, Iurii Semenov, Maura Casciola, Vitalii Kim, P. Thomas Vernier, Christian W. Zemlin
Summary: Short-duration, strong electric field pulses can be used for various applications, but nanosecond pulses require high field strengths. A theoretical model is presented to describe the effects of pulse trains on membranes, providing a method to calculate membrane charging time constant. Nanosecond pulses are found not more effective than longer pulses in charging nerve fibers, but considering multiple charging time constants improves the model's predictability for stimulating cardiomyocytes. The model also shows that pulse trains can cause significant oscillations of intracellular membrane potential.
BIOELECTROCHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Josette Zaklit, Alex Cabrera, Aaron Shaw, Rita Aoun, P. Thomas Vernier, Normand Leblanc, Gale L. Craviso
Summary: The study found that under certain conditions, ultra-short electric pulses can stimulate the release of catecholamines through exocytosis, with real-time observations showing that the release is Ca2+-dependent and the release events are relatively prolonged. Furthermore, the effectiveness of this stimulation method was demonstrated, indicating its potential as a novel electrostimulation modality for neurosecretion.
BIOELECTROCHEMISTRY
(2021)
Meeting Abstract
Biophysics
Flavia Mazzarda, Esin B. Sozer, Claudia Muratori, P. Thomas Vernier
BIOPHYSICAL JOURNAL
(2022)
Meeting Abstract
Biophysics
Federica Castellani, Maria Laura Fernandez, Marcelo Risk, P. Thomas Vernier
BIOPHYSICAL JOURNAL
(2022)
Meeting Abstract
Biophysics
Flavia Mazzarda, Esin B. Sozer, Julia L. Pittaluga, Claudia Muratori, P. Thomas Vernier
BIOPHYSICAL JOURNAL
(2021)
Meeting Abstract
Biophysics
Federica Castellani, Tatiana Zvoraneva, Esin B. Sozer, P. Thomas Vernier
BIOPHYSICAL JOURNAL
(2021)
Article
Physics, Fluids & Plasmas
C. Jiang, E. B. Sozer, S. Song, N. Lai, P. T. Vernier, S. Guo
PHYSICS OF PLASMAS
(2020)
Meeting Abstract
Biophysics
Esin B. Sozer, Sourav Haldar, Federica Castellani, P. Thomas Vernier, Joshua Zimmerberg
BIOPHYSICAL JOURNAL
(2020)
Meeting Abstract
Biophysics
Federica Castellani, Esin B. Sozer, P. Thomas Vernier
BIOPHYSICAL JOURNAL
(2020)