Results 81 to 90 of about 31,529 (265)
Frontiers in Plant ScienceRabdosia rubescens, a Chinese herbal medicine with anticancer properties, contains two active ingredients: oridonin and ponicidin. Both compounds exhibit antitumor effects by inducing tumor cell apoptosis and autophagy and inhibiting tumor cell ...
Yang Gao +33 more
doaj +1 more source
Light: Science & Applications, 2022 Ultrafast terahertz conductivity spectroscopy reveals the formation of large polarons in CH3NH3PbI3, which protects the charge carriers from scattering with polycrystalline grain boundaries or defects and explains the long lifetime.
Zuanming Jin +16 more
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Molecular imaging with terahertz waves
Optics Express, 2011 We demonstrate a highly sensitive THz molecular imaging (TMI) technique involving differential modulation of surface plasmons induced on nanoparticles and obtain target specific in vivo images of cancers. This technique can detect quantities of gold nanoparticles as small as 15 µM in vivo. A comparison of TMI images with near infrared absorption images
Seung Jae, Oh +8 more
openaire +3 more sources
A 300 GHz "Always-in-Focus" Focusing System for Target Detection [PDF]
, 2013 A focusing system for a 300 GHz radar with 5 m target distance and 10 mm diameter spot size resolution is proposed. The focusing system is based on a Gaussian telescope scheme and its main parameters have been de¬signed using Gaussian beam quasi-optical ...
Garcia-Muñoz, L. E. +2 more
core +1 more source
Ultra-wideband THz/IR Metamaterial Absorber based on Doped Silicon
, 2018 Metamaterial-based absorbers have been extensively investigated in the terahertz (THz) range with ever increasing performances. In this paper, we propose an all-dielectric THz absorber based on doped silicon.
Danhua Peng +5 more
core +1 more source
Advanced Science, EarlyView.In this work, ultrafast laser‐induced spin transfer and spin relaxation dynamics in 2D van der Waals antiferromagnetic CrI3/CrGeTe3 heterostructures are investigated. Laser excitation is demonstrated to induce pronounced interlayer nonequilibrium spin dynamics and ultrafast magnetic moment reconstruction, driving a transition from an antiferromagnetic (
Yang Wu +5 more
wiley +1 more source
Pulsed infrared thermographic study of a Chinese Bronze Lei
Heritage Science, 2022 In this paper, pulsed infrared thermography is applied to the study of a mold casting Chinese bronze lei 罍 dated to the late Shang dynasty (c.a.1250–1050 BC), currently housed in the Capital Normal University Museum.
Xue Yang +7 more
doaj +1 more source
Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser
Advanced Science, EarlyView.An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu +9 more
wiley +1 more source
Rapid Determination of Rivaroxaban by Using Terahertz Metamaterial Biosensor
PhotonicsRivaroxaban, a direct oral anticoagulant, is widely used in the management and prevention of thrombotic conditions. Dose adjustments are necessary to optimize efficacy based on individual physiological differences. However, current analytical methods are
Xinghao Huang, Jing Wu, Xu Wu, Yan Peng
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Efficient terahertz en-face imaging
Optics Express, 2011 In this work, we develop a pulsed terahertz imaging system in reflection geometry, where due to scanning of the terahertz beam neither the sample nor the emitter and detector have to be moved. We use a two mirror galvanoscanner for deflecting the beam, in combination with a single rotationally symmetric focusing lens.
Stefan, Katletz +7 more
openaire +2 more sources