Yuxin Leng
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View article: JADES: A Universal Framework for Jailbreak Assessment via Decompositional Scoring
JADES: A Universal Framework for Jailbreak Assessment via Decompositional Scoring Open
Accurately determining whether a jailbreak attempt has succeeded is a fundamental yet unresolved challenge. Existing evaluation methods rely on misaligned proxy indicators or naive holistic judgments. They frequently misinterpret model res…
View article: Three-stage dynamics of nonlinear pulse amplification in an ultrafast mid-infrared fiber amplifier with anomalous dispersion
Three-stage dynamics of nonlinear pulse amplification in an ultrafast mid-infrared fiber amplifier with anomalous dispersion Open
Nonlinear pulse amplification in optical fiber, with the capability of breaking the gain-bandwidth limitation, is a key technique for high-energy, ultrafast pulse generation. In the longer wavelength region (including 1.55 μm, 2 μm and 2.8…
View article: Kerr-lens mode-locked Ho:CALYO laser at 2.1 μm
Kerr-lens mode-locked Ho:CALYO laser at 2.1 μm Open
We report on a Kerr-lens mode-locked Ho laser operating at 2.1 μm, based on a disordered structure crystal Ho:CALYO. The laser-generated ultrashort pulses with a pulse duration of 177 fs and an average output power of 0.81 W at a repetitio…
View article: Isolated attosecond free-electron laser based on a sub-cycle driver from hollow capillary fibers
Isolated attosecond free-electron laser based on a sub-cycle driver from hollow capillary fibers Open
The attosecond light source provides an advanced tool for investigating electron motion using time-resolved-spectroscopy techniques. Isolated attosecond pulses, especially, will significantly advance the study of electron dynamics. However…
View article: Three-stage dynamics of nonlinear pulse amplification in ultrafast mid-infrared fiber amplifier with anomalous dispersion
Three-stage dynamics of nonlinear pulse amplification in ultrafast mid-infrared fiber amplifier with anomalous dispersion Open
Nonlinear pulse amplification in optical fiber, with capability of breaking the gain-bandwidth limitation, is a key technique for high-energy, ultrafast pulse generation. In the longer wavelength region (including 1.55 μm, 2 μm and 2.8 μm)…
View article: Enhanced Proton Acceleration via Petawatt Laguerre-Gaussian Lasers
Enhanced Proton Acceleration via Petawatt Laguerre-Gaussian Lasers Open
High-energy, high-flux collimated proton beams with high repetition rates are critical for applications such as proton therapy, proton radiography, high-energy-density matter generation, and compact particle accelerators. However, achievin…
View article: Characteristics of extreme ultraviolet emissions from interaction between delay-adjustable dual-wavelength laser and Sn target
Characteristics of extreme ultraviolet emissions from interaction between delay-adjustable dual-wavelength laser and Sn target Open
Laser-produced plasma extreme ultraviolet (LPP-EUV) source is one of the key technologies in advanced lithography systems. Recently, solid-state lasers have been proposed as an alternative drive laser for the next-generation LPP-EUV source…
View article: High-quality delivery of high-power picosecond lasers in single-ring anti-resonant hollow-core fiber for micromachining
High-quality delivery of high-power picosecond lasers in single-ring anti-resonant hollow-core fiber for micromachining Open
We present the flexible delivery of picosecond laser pulses with up to 20 W average power over a 3-m-long sample of anti-resonant hollow-core fiber (AR-HCF) for laser-micromachining applications. Our experiments highlight the importance of…
View article: Morphology Optimization by Non‐Halogenated and Twisted Volatile Solid Additive for High‐Efficiency Organic Solar Cells
Morphology Optimization by Non‐Halogenated and Twisted Volatile Solid Additive for High‐Efficiency Organic Solar Cells Open
Recently, volatile solid additives have attracted tremendous interest in the field of organic solar cells (OSCs), which can effectively improve device efficiency without sacrificing the reproducibility and stability of the device. However,…
View article: Gradual Optimization of Molecular Aggregation and Stacking Enables Over 19% Efficiency in Binary Organic Solar Cells
Gradual Optimization of Molecular Aggregation and Stacking Enables Over 19% Efficiency in Binary Organic Solar Cells Open
Volatile solid additive is an effective and simple strategy for morphology control in organic solar cells (OSCs). The development of environmentally friendly new additives which can also be easily removed without high‐temperature thermal a…
View article: Mode conversion via reflected stepped phase plate in relativistic systems
Mode conversion via reflected stepped phase plate in relativistic systems Open
The mode conversion efficiency (CE) of the relativistic Laguerre–Gaussian (LG) laser is researched in detail within the context of current petawatt laser facilities. The topological charge, radial integer, laser central wavelength, laser b…
View article: Multi-watt long-wavelength infrared femtosecond lasers and resonant enamel ablation
Multi-watt long-wavelength infrared femtosecond lasers and resonant enamel ablation Open
High-power broadband tunable long-wavelength infrared (LWIR) femtosecond lasers operating at fingerprint wavelengths of 7-14 μm hold significant promise across a range of applications, including molecular hyperspectral imaging, strong-fiel…
View article: Octave-wide broadening of ultraviolet dispersive wave driven by soliton-splitting dynamics
Octave-wide broadening of ultraviolet dispersive wave driven by soliton-splitting dynamics Open
Coherent dispersive wave emission, as an important phenomenon of soliton dynamics, manifests itself in multiple platforms of nonlinear optics from fibre waveguides to integrated photonics. Limited by its resonance nature, efficient generat…
View article: Tissue Ablation with Multi‐Millimeter Depth and Cellular‐Scale Collateral Damage by a Femtosecond Mid‐Infrared Laser Tuned to the Amide‐I Vibration
Tissue Ablation with Multi‐Millimeter Depth and Cellular‐Scale Collateral Damage by a Femtosecond Mid‐Infrared Laser Tuned to the Amide‐I Vibration Open
Laser ablation of bio‐tissues is the key technology of future surgeries, owing to the merits of submicron accuracy, non‐contact operation, and precision control assisted by automation and computer intelligence. Excellent efficiency, minima…
View article: Water‐Resistant Subwavelength Perovskite Lasing from Transparent Silica‐Based Nanocavity
Water‐Resistant Subwavelength Perovskite Lasing from Transparent Silica‐Based Nanocavity Open
Great research efforts are devoted to exploring the miniaturization of chip‐scale coherent light sources possessing excellent lasing performance. Despite the indispensable role in Si photonics, SiO 2 is generally considered not contributin…
View article: Self‐Referencing 3D Characterization of Ultrafast Optical‐Vortex Beams Using Tilted Interference TERMITES Technique (Laser Photonics Rev. 17(4)/2023)
Self‐Referencing 3D Characterization of Ultrafast Optical‐Vortex Beams Using Tilted Interference TERMITES Technique (Laser Photonics Rev. 17(4)/2023) Open
3D Reconstruction of Ultrafast Vortex Pulses Ultrafast optical-vortex beams carrying orbital angular momentum are of particular importance in many nonlinear-optics experiments. In article number 2200697, Jinyu Pan, Zhiyuan Huang, Meng Pang…
View article: High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer
High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer Open
Femtosecond laser ablation has been demonstrated to be a versatile tool to produce micro/nanoscale features with high precision and accuracy. However, the use of high laser fluence to increase the ablation efficiency usually results in unw…
View article: Temperature-dependent Luminescence Spectra of Ruddlesden-Popper Quasi-2D Perovskites
Temperature-dependent Luminescence Spectra of Ruddlesden-Popper Quasi-2D Perovskites Open
åäºç»´RuddlesdenâPopperï¼RâPï¼å¤åç©ééç¿å ·æä¼è¶çå çµç¹æ§ï¼å¨å¤ªé³è½çµæ± ãåå äºæ管ãæ¿å å¨çå çµå¨ä»¶ä¸åå°å¹¿æ³å ³æ³¨ï¼ä½ä¸¥éå½±åè½½æµåçå¼è±«åä¼ è¾ç¹æ§çæ¿åâ声å…
View article: Terawatt-Class Few-Cycle Short-Wave Infrared Vortex Laser
Terawatt-Class Few-Cycle Short-Wave Infrared Vortex Laser Open
As a driving source for many nonlinear vortex phenomena, such as the generation of isolated attosecond optical vortices, terahertz vortices, etc., terawatt-class few-cycle short-wave infrared vortex lasers are now attracting widespread att…
View article: High-gradient modulation of microbunchings using a minimized system driven by a vortex laser
High-gradient modulation of microbunchings using a minimized system driven by a vortex laser Open
This study entailed the development of a high-gradient modulation of microbunching for traditional radiation frequency accelerators using a minimized system driven by a relativistic Laguerre–Gaussian (LG) laser in three-dimensional particl…
View article: Piezoelectric High Temperature Liquid Droplet Spraying Component
Piezoelectric High Temperature Liquid Droplet Spraying Component Open
3.中国科学院 上海光学精密机械研究所，上海 201800)
View article: Self-referencing 3D characterization of ultrafast optical-vortex beams using tilted interference TERMITES technique
Self-referencing 3D characterization of ultrafast optical-vortex beams using tilted interference TERMITES technique Open
Femtosecond light pulses carrying optical angular momentums (OAMs), possessing intriguing properties of helical phase fronts and ultrafast temporal profiles, enable many applications in nonlinear optics, strong-field physics and laser micr…
View article: High-quality femtosecond laser surface micro/nano-structuring assisted by a thin frost layer
High-quality femtosecond laser surface micro/nano-structuring assisted by a thin frost layer Open
Femtosecond laser ablation has been demonstrated to be a versatile tool to produce micro/nanoscale features with high precision and accuracy. However, the use of high laser fluence to increase the ablation efficiency usually results in unw…
View article: Rare-earth induced nonlinear structural evolutions in fluorite solid solution crystals
Rare-earth induced nonlinear structural evolutions in fluorite solid solution crystals Open
The modification of chemical composition to improve desired material parameters is an effective method in materials science and engineering. In this work, Ca 1-x Sr x F 2 solid solution is chosen as the subject. Nd 3+ and Y 3+ ions are use…
View article: Advances in metal halide perovskite lasers: synthetic strategies, morphology control, and lasing emission
Advances in metal halide perovskite lasers: synthetic strategies, morphology control, and lasing emission Open
In the past decade, lead halide perovskites have emerged as potential optoelectronic materials in the fields of light-emitting diode, solar cell, photodetector, and laser, due to their low-cost synthesis method, tunable bandgap, high quant…
View article: Photoionization-induced broadband dispersive wave generated in an Ar-filled hollow-core photonic crystal fiber
Photoionization-induced broadband dispersive wave generated in an Ar-filled hollow-core photonic crystal fiber Open
The resonance band in hollow-core photonic crystal fiber (HC-PCF), while leading to high-loss region in the fiber transmission spectrum, has been successfully used for generating phase-matched dispersive wave (DW). Here, we report that the…