Results 101 to 110 of about 113,253 (318)

Single‐Chromophore Homojunction Organic Solar Cells: A Path to Simplicity and Efficiency

Advanced Materials, EarlyView.
This perspective discusses how the intrinsic optoelectronic properties of organic semiconductors, their molecular packing in the solid‐state, and internal energetic gradients within a device can enable free‐charge carrier generation in homojunction organic solar cells.
Shaun McAnally, Paul L. Burn, Paul E. Shaw   +2 more
wiley   +1 more source

Broadband heterodyne electro-optic sampling using a lithium niobate ridge-waveguide

Applied Physics Express
We demonstrated the bandwidth broadening of terahertz waves detected by heterodyne electro-optical sampling by implementing a ridge waveguide structure in a lithium niobate (LiNbO _3 ) crystal.
S. Mine, G. Gandubert, J. E. Nkeck, X. Ropagnol, K. Murate, F. Blanchard   +5 more
doaj   +1 more source

New phenomena in ultrafast laser interaction with matter

, 2009
Modification of transparent materials with ultrafast lasers has attracted considerable interest due to a wide range of applications including laser surgery, integrated optics, optical data storage, 3D micro- and nano-structuring [1].
Svirko, Yuri P., Shimotsuma, Yasuhiko, Hirao, Kazuyuki, Qiu, Jiarong, Kazansky, Peter G., Sakakura, Masaaki, Yang, Weijia, Beresna, Martynas   +7 more
core  

Elephant‐Skin‐Inspired Porous Cementitious Tiles with Programmable Crack Networks for Passive Cooling

Advanced Materials, EarlyView.
Elephant‐skin‐inspired crack networks are programmed in porous diatomaceous earth (DE)‐cement composites using substrate‐guided, stress‐concentration induced fracture. The resulting crack lattices act as capillary conduits that redistribute water, while the porous matrix stores moisture.
Qingya Huang, Kun‐Hao Yu, Ji Yoon Bae, Yunchan Lee, Dorit Aviv, Shu Yang   +5 more
wiley   +1 more source

Imaging Nanoscale Magnetic Structures With Polarized Soft X-Ray Photons

IEEE Photonics Journal, 2010
Imaging nanoscale magnetic structures and their fast dynamics is scientifically interesting and technologically of highest relevance. The combination of circularly polarized soft X-ray photons, which provide a strong X-ray magnetic circular dichroism ...
Peter Fischer, Mi-Young Im
doaj   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

Ultrafast dynamics of highly constrained azobenzene macrocycles

, 2019
The ultrafast photoisomerization of model azobenzene macrocycles was studied by transient absorption spectroscopy. Our results reveal a strong dependence of the dynamics and the overall molecular properties on the geometric constraints and the ...
Herman A. Wegner, Josef Wachtveitl, Slavov, Chavdar, Dreuw, Andreas (Prof. Dr.), Andreas Dreuw, Tim Stauch, Wachtveitl, Josef, Yang, Chong, Stauch, Tim, Andreas H. Heindl, Schweighauser, Luca, Chavdar Slavov, Heindl, Andreas H., Wegner, Herman A., Chong Yang, Luca Schweighauser   +15 more
core   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

Advanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Adaptively shaped advanced ultrafast laser sources

, 2011
The aim of the work presented in this thesis is to investigate adaptively shaped advanced ultrafast laser sources in the near-(NIR) and the mid-infrared (MIR) regimes.
Daga, Nikita K., Daga, Nikita K
core  

Experimentation of Entangled photon-pairs generation using an ultrafast source at gigahertz [PDF]

, 2013
In this dissertation we will present the experimental study of polarization entangled photon pairs generation, through spontaneous parametric down conversion (SPDC) using an ultrafast source at gigahertz.
Bloise, Eduardo
core