Results 101 to 110 of about 118,378 (304)

First observation of photon-photon interactions at Doris

Physics Letters B, 1979
Abstract With a forward tagging system and the BONANZA detector we observed 24 e + e - → e + e - e + e - events in agreement with the expected number from QED. We observed no e + e - → e + e - + hadrons event, and present an upper limit for the partial width Γ η ′→ γγ of 11.5 keV (95% CL) which is evidence against the Han ...
Besch, H. J., Eisermann, H. W., Von Eyss, H. J., von der Schmitt, H., BONANZA Collaboration, Löhr, B., Nöldeke, G., Tonutti, M., Vollrath, W., Wilcke, R., Hoffmann, H., Dehne, H. C., Kowalski, H.   +12 more
openaire   +3 more sources

Unraveling the Electronic Structure of Silicon Vacancy Centers in 4H‐SiC

Advanced Functional Materials, EarlyView.
The electronic structure of the silicon vacancy in 4H‐SiC is probed via transient absorption spectroscopy, uncovering previously inaccessible excited states of the quartet and doublet spin channels, including the V2' transition. In combination with theoretical analysis, a comprehensive picture of the electronic structure is established.
Ali Tayefeh Younesi, Minh Tuan Luu, Christopher Linderälv, Vytautas Žalandauskas, Marianne Etzelmüller Bathen, Nguyen Tien Son, Takeshi Ohshima, Gergő Thiering, Lukas Razinkovas, Ronald Ulbricht   +9 more
wiley   +1 more source

Photon-antibunching in the fluorescence of statistical ensembles of emitters at an optical nanofiber-tip

New Journal of Physics, 2019
This proposal investigates the photon-statistics of light emitted by a statistical ensemble of cold atoms excited by the near-field of an optical nanofiber tip.
Elmer Suarez, David Auwärter, Tiago J Arruda, Romain Bachelard, Philippe W Courteille, Claus Zimmermann, Sebastian Slama   +6 more
doaj   +1 more source

Template‐Confined Synthesis of Shape‐Engineered Single‐Crystal Gold Microplates in Lithographically‐Defined Polymeric Patterns

Advanced Functional Materials, EarlyView.
Single‐crystal gold microplates are high‐performance nanomaterials with an impressive wafer‐based application space. Progress has, however, been tempered by an inability to exert synthetic control over microplate size, shape, and positioning. In this work, control over these parameters is demonstrated using a seed‐mediated synthesis that both confines ...
Debasish Panda, Md Rashed Nizam, Walker J. Tuff, Collin C. Wyant, Maksym Zhukovskyi, Matthew R. Rosenberger, Botond Sánta, Edward C. Kinzel, Robert A. Hughes, Svetlana Neretina   +9 more
wiley   +1 more source

Mechanoluminescent HOF Nanotransducers Enabled Sono‐Optogenetics in Parkinsonian Rats

Advanced Functional Materials, EarlyView.
We present a mechanoluminescent system utilizing porous hydrogen‐bonded organic frameworks (HOFs) as a toolkit for focused ultrasound‐triggered, non‐invasive light delivery to the deep brain in rats. This approach enables the specific activation of PV‐GPe neurons in dopamine‐depleted Parkinson's disease rat models, resulting in a comparable alleviation
Wenliang Wang, Ilya Pyatnitskiy, Yanshu Shi, Kai Wing Kevin Tang, Yi Xie, Sihan Yu, Thomas Wynn, Xiangping Liu, Ju‐Chun Hsieh, Jinmo Jeong, Weilong He, Brinkley Artman, Anakaren Romero Lozano, Xi Shi, Arjun Sangani, Lief E Fenno, Samantha Santacruz, Banglin Chen, Huiliang Wang   +18 more
wiley   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

Controlling the quantum state of a single photon emitted from a single polariton

, 2011
International audienceWe investigate in detail the optimal conditions for a high fidelity transfer from a single polariton state to a single photon state and subsequent homodyne detection of the single photon.
Grangier, Philippe, Philippe Grangier, Bimbard, Erwan, Parigi, Valentina, Ourjoumtsev, Alexei, Alexei Ourjoumtsev, Valentina Parigi, Stanojevic, Jovica, Jovica Stanojevic, Erwan Bimbard, Rosa Tualle-Brouri, Tualle-Brouri, Rosa   +11 more
core   +1 more source

Photon-Photon Interaction (version 2.0)

, 2018
The famous 1927 Solvay Conference was considered a turning point in the world of Physics. The scientific realists like Albert Einstein had lost and the instrumentalists like Niels Bohr had won the fundamental conflict. Since then Physics has followed the path of the instrumentalists in which Quantum Physics has been determined by the concept of ...
openaire   +3 more sources

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

Chloroplast and Cell Imaging at Submicron Resolution by Two-Photon Excitation

, 2012
Novel, two-photon NIR excitation fluorescence correlation microspectroscopy tests and preliminary results were presented in this article with submicron resolution for concentrated suspensions of functional cells and chloroplast membranes.
I C. Baianu
core