We demonstrate that high-field terahertz (THz) pulses trigger transient insulator-to-metal transition in a nanoantenna patterned vanadium dioxide thin film. THz transmission of instantaneously decreases the presence strong fields. The absorption indicates fields induce electronic without causing structural transformation. phase is activated on subcycle time scale during which pulse drives electron distribution far from equilibrium and disturb correlation. lower activation energy insulating...

ABSTRACT Accurate prediction of vapor pressure is essential in chemical engineering, environmental science, and pharmaceutical development, impacting the volatility stability compounds. Traditional methods often fall short for complex new molecular structures. This study introduces an advanced machine learning approach, integrating graph neural networks (GNNs), CHEM‐BERT models to improve accuracy. Utilizing largest dataset date, we derived comprehensive descriptors fingerprints. We...

We show that the transmission of a terahertz (THz) pulse through single-layer graphene is strongly nonlinear. As peak electric field THz exceeds 50 kV/cm, becomes increasingly transparent to radiation. When strength reaches 800 increased transparency corresponds two-fold decrease in time-average sheet conductivity (time averaged over duration pulse). Time-resolved measurements reveal leading portion creates for trailing portion, with 10-fold suppression at tail strongest pulse. Comparing...

We demonstrate that unidirectionally aligned, free-standing multi-walled carbon nanotubes (CNTs) exhibit highly anisotropic linear and nonlinear terahertz (THz) responses. For the polarization parallel to CNT axis, strong THz pulses induce absorption in quasi-one-dimensional conducting media, while no effect is observed perpendicular configuration. Time-resolved measurements of transmitted a theoretical analysis data reveal intense fields enhance permittivity by generating charge carriers.

Time-resolved high-field terahertz (THz) spectroscopy of photoexcited graphene demonstrates extraordinary photocarrier dynamics in single-layer graphene. Strong THz fields and photoexcitation simultaneously enhance the transmission mainly due to increase carrier scattering rates. A theoretical analysis confirms that conductivity undergoes transient decreases large extent under optical excitations, indicating both strong effectively elevate The relaxation photocarriers, on other hand, shows...

Following femtosecond (fs) laser pulse irradiation, the formation of a new type low-spatial-frequency laser-induced periodic surface structure (LSFL) patterns, namely, omnidirectional LSFLs (OD-LSFLs) with ordering their orientations, are investigated on Ni in this Letter. Using liquid crystal polymer patterned depolarizer, we periodically rotate polarization fs pulses across spot and create OD-LSFLs by raster scanning pulses. We also show that period OD-LSFL orientation rotation can be...

Despite the well-established relationship between state anxiety and marksmanship performance, few efforts have examined individual differences that affect extent to which individuals experience in combat situations. Thus, further studies are needed increase probability of mission accomplishment, could ultimately serve safely bring soldiers home. The present study how death anxiety, a trait-based difference affects turn shooting performance on battlefield. In particular, we used virtual...

We propose a simple nondestructive method to obtain refractive-index profiles of graded-index (GRIN) light-focusing rod by means diffraction grating. In our proposed method, laser beam is illuminated through grating perpendicular the axis GRIN lens and separation between zeroth first-order peaks measured analyzed. The results demonstrate that commercially available lenses can be successfully reconstructed.

Although the hydrolysis mechanism of nerve agents, which is main decontamination pathway, has been studied experimentally and theoretically, reliable theoretical prediction method for rate not yet. Furthermore, after CWC (Chemical Warfare Agent) list updated, Novichok candidate structures can be more than 10,000 structures, it possible to perform experiment all them synthesizing getting rate. Therefore, developing a crucial prepare forthcoming usage new types agents. Herein, by using DFT...

Photocarrier injection by a femtosecond laser excitation immediately turns off the plasmon resonance in nanoantenna-patterned GaAs, while strong and short terahertz pulse instantly revives antenna resonance. The induced transparency, hugely boosted field enhancement antennas via resonance, exhibits extremely nonlinear effects. fields drive intervalley scattering interband tunneling of photocarriers consequently reduce transient conductivity photoexcited GaAs leading to revival In high-field...

In this work, we investigate the spectral reflectance of femtosecond laser-induced columnar structures on Al, and find that unusually increases with number irradiating pulses.

A terahertz metamaterial consisting of radiative slot antennas and subradiant complementary split-ring resonators exhibits plasmon induced opacity in a narrow spectral range due to the destructive interference between bright dark modes coupled oscillators. Femtosecond optical excitations instantly quench mode coupling oscillations, injecting photocarriers into metamaterial. The resonances are transiently restored by intense pulses. strong fields induce intervalley scattering interband...

We investigated the colorimetric behaviors of metal surfaces with unidirectional low-spatial-frequency laser-induced periodic surface structures (UD-LSFLs) and omnidirectional LSFLs (OD-LSFLs) fabricated using femtosecond laser pulse irradiation. With CIE standard illuminant D65, incident at −45°, we show that UD-LSFLs on metals transform polished to gonio-apparent materials a unique behavior responses, depending both detection rotation angles, whereas OD-LSFLs have nearly uniform colors...

Structurally colored materials present potential technological applications including anticounterfeiting tags for authentication due to the ability controllably manipulate colors through nanostructuring. Yet, no of deep learning algorithms, known discover meaningful structures in data with far-reaching optimization capabilities, such optical involving low-spatial-frequency laser-induced periodic surface (LSFLs) have been demonstrated date. In this work, by fine-tuning one lightweight...

We demonstrate THz-induced transparency in two types of single-layer CVD graphene samples utilizing high-field THz pulses. The nonlinear transmission depends on the local conductivity and dynamically varies time domain.

We demonstrate THz-induced transparency in two types of single-layer CVD graphene samples utilizing high-field THz pulses. The nonlinear transmission depends on the local conductivity and dynamically varies time domain.

By constructing structurally colorized images on metals with femtosecond laser-induced periodic structures (fs-LIPSSs), we demonstrate the color variations of fs-LIPSSs a broad angular range illumination incidence can be used for optical authentication.

지각-운동 기술뿐만 아니라 개인 내적인 차이에 기반한 심리적 변인들도 사격술에 영향을 나타낼 수 있다. 성격과 자기효능감이 사격 관련 수행성과와 유의한 관련성이 있음을 고려하여, 본 연구는 실탄 사전 경험이 없는 299명을 대상으로 수행에 미치는 검증하였다. 수행은 다양한 탄종의 6자유도 탄도 알고리즘이 적용된 메타버스(metaverse) 기반 과학화 훈련체계 시뮬레이터에서 영점 사격과 실탄을 이용한 사격으로 진행되었다. 이항 로지스틱 분석 결과, 성격 5 요인 중 외향성이 메타버스 시뮬레이터 사격(odd ratio = 1.12, p .05)과 .05)에서 관련성을 나타냈으며 다른 유형과 자기효능감은 영향력을 미치지 않았다. 부가적으로 외향성의 제외한 이후에도, 사격에 합격한 참가자는 사격에서도 합격할 가능성이 더 컸다(odd 2.05, .05). 이러한 결과는 긍정적인 미칠 보여준다. 또한, 6 자유도 곡선 시뮬레이션을 적용한 정밀사격훈련체계가 사격술 향상에 효과적일...