Picosecond
View article: Directional loss of contrast by dephasing in temporal double-slit interferometry
Directional loss of contrast by dephasing in temporal double-slit interferometry Open
Attosecond streaking camera is an ex situ technique in which a linearly polarized (LP) XUV attopulse produces an electron wavepacket by photoionization in the presence of an IR femtopulse. By moving the two synchronous oppositely circularl…
View article: Ultrafast Excited-State Dynamics of a Porphyrin–OPE Conjugate: Energy Transfer and Aggregation Effects
Ultrafast Excited-State Dynamics of a Porphyrin–OPE Conjugate: Energy Transfer and Aggregation Effects Open
View article: Band-filling and relaxation effects in the transient dielectric function of Ge
Band-filling and relaxation effects in the transient dielectric function of Ge Open
This study investigates the transient dielectric function of germanium at charge carrier densities of the order of 1020cm−3 using time-resolved spectroscopic ellipsometry. By employing a pump-probe technique, we explore the temporal evolut…
View article: Combined experimental and theoretical insights into the solvent-dependent photochromic properties of nitrospiropyrans
Combined experimental and theoretical insights into the solvent-dependent photochromic properties of nitrospiropyrans Open
Spiropyrans exhibit reversible photochromism that strongly depends on solvent polarity; yet a quantitative understanding of this relationship remains incomplete. Here we combine detailed spectroscopic and kinetic experiments with ab initio…
View article: Collisionless Shocks Mediated by Shear-Flow Magnetic Fields in Ultraintense-Laser-Produced Counter-Streaming Plasmas
Collisionless Shocks Mediated by Shear-Flow Magnetic Fields in Ultraintense-Laser-Produced Counter-Streaming Plasmas Open
The formation of ion-Weibel-mediated collisionless shocks (IW-CSs) in ultraintense-laser-produced counter-streaming plasmas is investigated using particle-in-cell simulations. Analysis of the underlying microphysics reveals that a shear-fl…
View article: Excitation energy transfer and trapping in Photosystem I of the green alga Bryopsis corticulans
Excitation energy transfer and trapping in Photosystem I of the green alga Bryopsis corticulans Open
Photosystem I (PSI) from the siphonous green alga Bryopsis corticulans carries ten subunits of Light-Harvesting Complex I (LHCI) that enlarge its absorption cross-section yet must still deliver excitations rapidly to the P700 re…
View article: Direct readout of excited state lifetimes in chlorin chromophores under electronic strong coupling
Direct readout of excited state lifetimes in chlorin chromophores under electronic strong coupling Open
The mechanisms governing molecular photophysics under electronic strong coupling (ESC) remain elusive to date. Here, we use ultrafast pump-probe spectroscopy to study the nonradiative excited state relaxation dynamics of chlorin e6 trimeth…
View article: Treatment outcomes of melasma using picosecond Nd: YAG 1064nm laser at Can Tho Dermatology Hospital
Treatment outcomes of melasma using picosecond Nd: YAG 1064nm laser at Can Tho Dermatology Hospital Open
Objective: To evaluate the efficacy of the picosecond Nd:YAG 1064 nm laser in treating melasma at Can Tho Dermatology Hospital from 2024 to 2025. Research object and Method: A cross-sectional study was conducted on 55 patients diagnosed wi…
View article: Versatile high-power monolithic all-glass fiber amplifier for pulsed signals with a wide range of repetition rates
Versatile high-power monolithic all-glass fiber amplifier for pulsed signals with a wide range of repetition rates Open
This study presents a compact, high-power monolithic all-glass spun tapered double-clad fiber amplifier for single-stage amplification of narrow linewidth picosecond pulsed signals from a few tens of mW to several hundred watts of average …
View article: Enhancing the shear strength of adhesive bonded compression-molded CFRP laminates using selective UV picosecond laser treatment
Enhancing the shear strength of adhesive bonded compression-molded CFRP laminates using selective UV picosecond laser treatment Open
View article: Progressive Induction of Stable, High-Fidelity Simulated Physical Embodiment in a Quantized 27B Gemma-3 Model: A Controlled Six-Layer Prompt Ablation Study With and Without Refusal Suppression [Preprint]
Progressive Induction of Stable, High-Fidelity Simulated Physical Embodiment in a Quantized 27B Gemma-3 Model: A Controlled Six-Layer Prompt Ablation Study With and Without Refusal Suppression [Preprint] Open
This preprint demonstrates — with perfect monotonic gradients, full raw logs, and immediate-replication artifacts — that stable, vivid, high-fidelity simulated physical embodiment is already latently present in today's open-source 27B mode…
View article: Comprehensive Structural and Interfacial Characterization of Laser-Sliced SiC Wafers
Comprehensive Structural and Interfacial Characterization of Laser-Sliced SiC Wafers Open
Laser slicing has emerged as a promising low-kerf and low-damage technique for fabricating SiC wafers; however, its influence on crystal integrity, near-surface modification, and charge-transport properties requires further clarification. …
View article: Progressive Induction of Stable, High-Fidelity Simulated Physical Embodiment in a Quantized 27B Gemma-3 Model: A Controlled Six-Layer Prompt Ablation Study With and Without Refusal Suppression [Preprint]
Progressive Induction of Stable, High-Fidelity Simulated Physical Embodiment in a Quantized 27B Gemma-3 Model: A Controlled Six-Layer Prompt Ablation Study With and Without Refusal Suppression [Preprint] Open
This preprint demonstrates — with perfect monotonic gradients, full raw logs, and immediate-replication artifacts — that stable, vivid, high-fidelity simulated physical embodiment is already latently present in today's op…
View article: Ultrafast μeV-Precision Bandgap Engineering in Low-Dimensional Topological Insulators
Ultrafast μeV-Precision Bandgap Engineering in Low-Dimensional Topological Insulators Open
Precise and ultrafast control of electronic band structures is a central challenge for advancing quantum functional materials and devices. Conventional approaches--such as chemical doping, lattice strain, or external gating--offer robust s…
View article: Ultrafast μeV-Precision Bandgap Engineering in Low-Dimensional Topological Insulators
Ultrafast μeV-Precision Bandgap Engineering in Low-Dimensional Topological Insulators Open
Precise and ultrafast control of electronic band structures is a central challenge for advancing quantum functional materials and devices. Conventional approaches--such as chemical doping, lattice strain, or external gating--offer robust s…
View article: Intelligent Inverse Design of Multi-Layer Metasurface Cavities for Dual Resonance Enhancement of Nanodiamond Single Photon Emitters
Intelligent Inverse Design of Multi-Layer Metasurface Cavities for Dual Resonance Enhancement of Nanodiamond Single Photon Emitters Open
Single-photon emitters (SPEs) based on nitrogen-vacancy centers in nanodiamonds (neutral NV0 (wavelength 575 nm) and negative NV- (wavelength 637 nm)) represent promising platforms for quantum nanophotonics applications, yet their emission…
View article: Femto- and picosecond laser induced breakdown spectrometry signals statistics
Femto- and picosecond laser induced breakdown spectrometry signals statistics Open
View article: Intelligent Inverse Design of Multi-Layer Metasurface Cavities for Dual Resonance Enhancement of Nanodiamond Single Photon Emitters
Intelligent Inverse Design of Multi-Layer Metasurface Cavities for Dual Resonance Enhancement of Nanodiamond Single Photon Emitters Open
Single-photon emitters (SPEs) based on nitrogen-vacancy centers in nanodiamonds (neutral NV0 (wavelength 575 nm) and negative NV- (wavelength 637 nm)) represent promising platforms for quantum nanophotonics applications, yet their emission…
View article: Temperature Dependence of the Vibrational Wave-Packet Dynamics of Cu <sub>5</sub>
Temperature Dependence of the Vibrational Wave-Packet Dynamics of Cu <sub>5</sub> Open
Vibrational wave-packet dynamics on the electronic ground state of the neutral copper pentamer (Cu5) are studied by femtosecond (fs) pump-probe spectroscopy using the 'negative ion to neutral to positive ion' excitation scheme (…
View article: Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light
Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light Open
Frequency upconversion, which converts low‐energy photons into higher‐energy ones, typically requires intense coherent illumination to drive nonlinear processes or the use of externally driven optoelectronic devices. Here, an upconversion …
View article: Highly Selective Laser Ablation for Thin-Film Electronics: Overcoming Variations Due to Minute Optical Path Length Differences in Plastic Substrates
Highly Selective Laser Ablation for Thin-Film Electronics: Overcoming Variations Due to Minute Optical Path Length Differences in Plastic Substrates Open
Roll-to-roll production of thin organic and large-area electronic (TOLAE) devices often involves a two-step process per functional layer: a continuous, un-pattered deposition of the film and subsequent structuring process, such as laser ab…
View article: Bidimensional measurements of photon statistics within a multimodal temporal framework
Bidimensional measurements of photon statistics within a multimodal temporal framework Open
Ultrafast imaging of photon statistics in two dimensions is a powerful tool for probing non-equilibrium and transient optical phenomena, yet it remains experimentally challenging due to the simultaneous need for high temporal resolution an…
View article: High-flux and high-resolution coded-source radiography based on picosecond laser-irradiated tube targets
High-flux and high-resolution coded-source radiography based on picosecond laser-irradiated tube targets Open
While picosecond petawatt laser-driven X-rays hold great promise as backlighting sources for high-energy-density physics research, traditional point-projection methods fail to achieve sufficient photon flux and spatial resolution simultane…
View article: Unlocking ultrafast hot hole transport in transition metal oxides governed by the nature of optical transitions
Unlocking ultrafast hot hole transport in transition metal oxides governed by the nature of optical transitions Open
The intrinsically low carrier mobility of transition metal oxides within the polaron transport framework fundamentally limits their optoelectronic performance. Although optical transitions profoundly impact carrier generation and transport…
View article: Post-compression of a Q-switched laser in a glass-rod multi-pass cell
Post-compression of a Q-switched laser in a glass-rod multi-pass cell Open
Q-switched lasers are compact, cost-effective, and highly pulse energy-scalable sources for nanosecond-scale laser pulses. The technology has been developed for many decades and is widely used in scientific, industrial and medical applicat…
View article: Bidimensional measurements of photon statistics within a multimodal temporal framework
Bidimensional measurements of photon statistics within a multimodal temporal framework Open
Ultrafast imaging of photon statistics in two dimensions is a powerful tool for probing non-equilibrium and transient optical phenomena, yet it remains experimentally challenging due to the simultaneous need for high temporal resolution an…
View article: Cascaded hollow FP cavities on fiber end-face for ultrasonic and photoacoustic detection
Cascaded hollow FP cavities on fiber end-face for ultrasonic and photoacoustic detection Open
For photoacoustic (PA) detectors, compact form factor, exceptional sensitivity, broad bandwidth, and omnidirectional responsiveness are crucial performance indicators. In this research, we introduce what we believe to be a novel cascaded h…
View article: SPAD Image Sensors with Embedded Intelligence
SPAD Image Sensors with Embedded Intelligence Open
Single-photon avalanche diodes (SPADs) are solid-state photodetectors that can detect individual photons with picosecond timing precision, enabling powerful time-resolved imaging across scientific, industrial, and biomedical applications. …
View article: Direct observation of room-temperature exciton condensation
Direct observation of room-temperature exciton condensation Open
Exciton condensation--an interaction-driven, macroscopically coherent paired-fermion state--offers the prospect for dissipationless energy transport in solids, akin to that in superconductivity. Although their light effective mass and stro…
View article: Direct observation of room-temperature exciton condensation
Direct observation of room-temperature exciton condensation Open
Exciton condensation--an interaction-driven, macroscopically coherent paired-fermion state--offers the prospect for dissipationless energy transport in solids, akin to that in superconductivity. Although their light effective mass and stro…