Results 111 to 120 of about 314,124 (266)

Photon-assisted ultrafast electron–hole plasma expansion in direct band semiconductors

Nanophotonics
Time-resolved terahertz spectroscopy is used to investigate formation and ultrafast long-distance propagation of electron–hole plasma in strongly photoexcited GaAs and InP.
Troha Tinkara, Klimovič Filip, Ostatnický Tomáš, Němec Hynek, Kužel Petr   +4 more
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Absorption effects in lasing microdroplets of dye solutions

Responsive Materials
Lasers generate coherent, collimated, intense and monochromatic radiation at optical wavelengths with precise spatiotemporal control. This unique combination of attractive properties is stimulating the design of optical cavities and gain materials to ...
William M. Piedra, Andrea Tomassini, Amrita Singh, Françisco M. Raymo   +3 more
doaj   +1 more source

Exciton–exciton annihilation and biexciton stimulated emission in graphene nanoribbons

Nature Communications, 2016
Graphene nanoribbons confine electrons to just one dimension and this gives rise to strong electron–hole interactions. Here, the authors investigate the creation and recombination of biexcitons in these structures by ultrafast optical pulses using ...
Giancarlo Soavi, Stefano Dal Conte, Cristian Manzoni, Daniele Viola, Akimitsu Narita, Yunbin Hu, Xinliang Feng, Ulrich Hohenester, Elisa Molinari, Deborah Prezzi, Klaus Müllen, Giulio Cerullo   +11 more
doaj   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Intramolecular Down‐ and Up‐Conversion in Dimeric Tetracene Complexes Centered via Platinum(II) and Palladium(II)

Advanced Functional Materials, EarlyView.
Metal‐tetracene dimeric complexes are synthesized through the pyridyl coordination to either Pt(II) or Pd(II). Photophysical properties are systematically compared as a function of the metal using steady‐state and time‐resolved spectroscopy. The Pt(II) dimer exhibits efficient intramolecular singlet fission and subsequent intramolecular up‐conversion ...
Yifan Bo, Yuxuan Hou, Melchor Matabuena, Rik R. Tykwinski, Dirk M. Guldi   +4 more
wiley   +1 more source

Electric Field‐Stimulated Autofluorescence for In Situ 3D Characterization of Polymer Defects

Advanced Science
The absence of in situ detection approaches for internal defect structures in polymers (such as microscale fillers, voids, and electrical trees) has long impeded advanced materials characterization. Herein, it is demonstrate that moderate electric fields
Chaolu Niu, Potao Sun, Wenxia Sima, Tao Yuan, Ming Yang, Yuhang Yang, Yuxiang Mai, Qin Deng, Yu Zhang   +8 more
doaj   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

Advanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai, Md Shakhawath Hossain, Nhat Minh Nguyen, Yongliang Chen, Chaohao Chen, Xiaoxue Xu, Quang Thang Trinh, Toan Dinh, Toan Trong Tran   +8 more
wiley   +1 more source

Pushing the Resolution Limit of Stimulated Emission Depletion Optical Nanoscopy. [PDF]

Int J Mol Sci, 2023
Jeong S, Koh D, Gwak E, Srambickal CV, Seo D, Widengren J, Lee JC.   +6 more
europepmc   +1 more source

Laser discrimination by stimulated emission of a phosphor [PDF]

A method for discriminating sources of UV, near infrared, and far infrared laser radiation was discovered. This technology is based on the use of a single magnesium sulfide phosphor doubly doped with rare earth ions, which is thermally/optically ...
Chakrabarti, K., Mathur, V. K.
core   +1 more source