Results 161 to 170 of about 36,896 (288)

Synthesis of space-time wave packets using correlated frequency comb and spatial field. [PDF]

Nanophotonics
Willner AE, Su X, Zuo Y, Wang Y, Jiang Z, Minoofar A, Lian H, Zhao Z, Alhaddad A, Zeng R.   +9 more
europepmc   +1 more source

Ultrasonic super-oscillation wave-packets with an acoustic meta-lens. [PDF]

Nat Commun, 2019
Shen YX, Peng YG, Cai F, Huang K, Zhao DG, Qiu CW, Zheng H, Zhu XF.   +7 more
europepmc   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Space-time wave packets in multimode optical fibers with controlled dynamic motions and tunable group velocities. [PDF]

Nat Commun
Su X, Zou K, Wang Y, Yessenov M, Zhou H, Song H, Ko W, Zeng R, Alhaddad A, Ramakrishnan M, Duan Y, Abouraddy AF, Tur M, Christodoulides DN, Willner AE.   +14 more
europepmc   +1 more source

A Functional 2D Carbon Allotrope Combining Nanoporous Graphene and Biphenylene Segments

Advanced Materials, EarlyView.
The synthesis of a novel nanoporous graphene (NPG) is reported with biphenylene segments via thermal fusion of 12‐armchair porous graphene nanoribbons grown on gold surfaces. Characterization using STM, AFM, and DFT reveals low‐defect semiconducting behaviour and tunable band gaps.
Paula Angulo‐Portugal, Martin Irizar, Longfeng Huang, Mamun Sarker, Mustafa A. Ashoush, Zakaria M. Abd El‐Fattah, Johannes Barth, Frederik Schiller, Afaf El‐Sayed, Fei Gao, Dimas G. de Oteyza, Alexander Sinitskii, Aran Garcia‐Lekue, Martina Corso, Ignacio Piquero‐Zulaica   +14 more
wiley   +1 more source

Nuclear quantum memory for hard x-ray photon wave packets. [PDF]

Sci Adv
Velten S, Bocklage L, Zhang X, Schlage K, Panchwanee A, Sadashivaiah S, Sergeev I, Leupold O, Chumakov AI, Kocharovskaya O, Röhlsberger R.   +10 more
europepmc   +1 more source

Odd electron wave packets from cycloidal ultrashort laser fields. [PDF]

Nat Commun, 2019
Kerbstadt S, Eickhoff K, Bayer T, Wollenhaupt M.   +3 more
europepmc   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Optical space-time wave packets having arbitrary group velocities in free space. [PDF]

Nat Commun, 2019
Kondakci HE, Abouraddy AF.
europepmc   +1 more source

Spin‐Split Edge States in Metal‐Supported Graphene Nanoislands Obtained by CVD

Advanced Materials, EarlyView.
Combining STM measurements and ab‐initio calculations, we show that zig‐zag edges in graphene nanoislands grown on Ni(111) by CVD retrieve their spin‐polarized edge states after intercalation of a few monolayers of Au. ABSTRACT Spin‐split states localized on zigzag edges have been predicted for different free‐standing graphene nanostructures.
Michele Gastaldo, Masoud Mansouri, Carlos Garcia‐Fernandez, Daniel Sánchez‐Portal, Aran Garcia‐Lekue, Gustavo Ceballos, Aitor Mugarza   +6 more
wiley   +1 more source