Results 91 to 100 of about 1,364,580 (250)

Quantum coherence controls the charge separation in a prototypical artificial light harvesting system

EPJ Web of Conferences, 2013
Ultrafast spectroscopy and quantum-dynamics simulations of an artificial supramolecular light-harvesting system — a supramolecular triad - provide strong evidence that the quantum-correlated wavelike motion of electrons and nuclei on a timescale of few ...
Schramm H., Cerullo G., Maiuri M., Brida D., Molinari E., Rubio A., Spallanzani N., Rozzi C. A., Falke S.M., Christoffers J., Lienau C.   +10 more
doaj   +1 more source

High Power 4.2-Cycle Mid-Infrared Pulses From a Self-Compression Optical Parametric Oscillator

IEEE Photonics Journal, 2018
We demonstrate the generation of few cycle mid-infrared (MIR) pulses from a self-compressed optical parametric oscillator (OPO), synchronously pumped by a 105 fs Yb3+ doped fiber laser system. By using a ring cavity design, 4.2-cycle (45.3 fs) MIR
Jintao Fan, Chenglin Gu, Ruoyu Liao, Lu Chai, Minglie Hu   +4 more
doaj   +1 more source

Exploring the energy disposal immediately after bond-breaking in solution:the wavelength-dependent excited state dissociation pathways of para-methylthiophenol [PDF]

, 2013
A wavelength-resolved (λpump = 295, 285, 270, and 267 nm) photodissociation study of para-methylthiophenol (p-MePhSH) in ethanol solution has been performed using femtosecond transient absorption (TA) spectroscopy, and the results compared with those ...
Das, Saptaparna, Oliver, Thomas A.A., Bradforth, Stephen E., Ashfold, Michael N. R., Zhang, Yuyuan, Roy, Anirban   +5 more
core   +1 more source

Defect‐Templated Phase Engineering in Atomically Thin Metals

Advanced Materials, EarlyView.
Graphene defects are transformed from passive imperfections into programmable templates for phase‐selective growth of atomically thin silver. Plasma‐generated boundary defects favor Ag(1), whereas sp3‐rich zero‐layer graphene promotes Ag(2). This defect‐directed intercalation links local graphene chemistry to crystalline phase, electronic structure ...
Arpit Jain, Boyang Zheng, Sawani Datta, Kanchan Ulman, Jakob Henz, Matthew Wei‐Jun Liu, Van Dong Pham, Wen He, Chengye Dong, Li‐Syuan Lu, Alexander Vera, Nader Sawtarie, Wesley Auker, Ke Wang, Bob Hengstebeck, Zachary W. Henshaw, Shreya Mathela, Maxwell Wetherington, William H. Blades, Kenneth Knappenberger, Ursula Wurstbauer, Su Ying Quek, Ulrich Starke, Shengxi Huang, Vincent H. Crespi, Joshua A. Robinson   +25 more
wiley   +1 more source

Terahertz Modulation of Even-order Polarization in GaAs

IEEE Photonics Journal
The application of electric fields induces changes in the symmetry of crystals, which can be observed spectroscopically as variations in the even harmonic generation. In this study, we report the ultrafast modulation of GaAs crystal symmetry using strong
Jianhua Sang, Haoyu Huang, Liwei Song, Ye Tian, Ruxin Li   +4 more
doaj   +1 more source

Moiré‐Induced Symmetry Breaking of Charge Order in van der Waals Heterostructures

Advanced Materials, EarlyView.
A uniaxial moiré potential in misfit (MS)1+δTaS2 heterostructures selectively reshape charge order: the embedded 1H‐TaS2 layer hosts an incommensurate charge‐density wave, fragmented into nanometer domains and stripped of threefold symmetry. Superconductivity, however, remains uniform and fully gapped, revealing heterosymmetry stacking as a selective ...
Sandra Sajan, Laura Pätzold, Tarushi Agarwal, Clara Pfister, Haojie Guo, Sisheng Duan, P. V. Sruthibhai, Mariana Rossi, Maria N. Gastiasoro, Sara Barja, Ravi P. Singh, Tim Wehling, Miguel M. Ugeda   +12 more
wiley   +1 more source

Ultra-fast force-clamp spectroscopy data on the interaction between skeletal muscle myosin and actin

Data in Brief, 2019
Ultrafast force-clamp spectroscopy is a single molecule technique based on laser tweezers with sub-millisecond and sub-nanometer resolution. The technique has been successfully applied to investigate the rapid conformational changes that occur when a ...
Manuela Maffei, Diego Beneventi, Monica Canepari, Roberto Bottinelli, Francesco Saverio Pavone, Marco Capitanio   +5 more
doaj   +1 more source

Ultrafast 2D spectroscopy with frequency combs: Towards cavity-enhanced multidimentional spectroscopy in molecular beams [PDF]

, 2019
Made available in DSpace on 2019-07-15T22:16:33Z (GMT). No. of bitstreams: 2 3816.pdf: 13365 bytes, checksum: 87e8e66d1faa0e5a2cf192e301d8c2bc (MD5) license.txt: 4802 bytes, checksum: 58353f9dd6876860dd5221f3d7872a95 (MD5) Previous issue date: 2019-06 ...
Nyaupane, Parashu R, Nyaupane, Parashu R.   +1 more
core   +1 more source

Side‐Chain‐Induced Interlayer Slipping in Metalloporphyrin COFs Enables Microenvironment and Spin‐State Regulation for Photocatalytic CO2 Reduction

Advanced Materials, EarlyView.
Alkoxy chain length drives a continuous transition from eclipsed AA to a serrated, slipped AA* configuration over Co‐porphyrin COFs. A moderate slip both contracts the pore channel to enrich CO2 and suppress hydrogen evolution, and enhances collective high‐spin of Co sites, which delivers a record CO production rate with high selectivity.
Jie He, Qingxuan Chen, Minxian Zhang, Wenhao Zhao, Aoni Xu, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +8 more
wiley   +1 more source

Electron heating and thermal relaxation of gold nanorods revealed by two-dimensional electronic spectroscopy

Nature Communications, 2018
Electron dynamics in plasmonic nanoparticles are often studied with transient absorption spectroscopy. Here, Lietard et al. apply two-dimensional electronic spectroscopy, a method generally used for molecular spectroscopy, to study ultrafast nonlinear ...
Aude Lietard, Cho-Shuen Hsieh, Hanju Rhee, Minhaeng Cho   +3 more
doaj   +1 more source