Results 41 to 50 of about 12,216 (264)

Second-harmonic generation in the topological multifold semimetal RhSi

Physical Review Research, 2022
Recent experiments in the topological Weyl semimetal TaAs have observed record-breaking second-harmonic generation (SHG), a nonlinear optical response at 2ω generated by an incoming light source at ω.
Baozhu Lu, Sharareh Sayyad, Miguel Ángel Sánchez-Martínez, Kaustuv Manna, Claudia Felser, Adolfo G. Grushin, Darius H. Torchinsky   +6 more
doaj   +1 more source

Azobenzene's Cross‐Scale Optics and Photonics: Molecular Photoswitching, Mesoscopic Material Motions, and Adaptive Devices

Advanced Materials, EarlyView.
Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son, Soyul Kwak, Heerin Noh, Minsang Kim, Doyeon Noh, Subhayan Chakraborty, Jaewon Lee, YongDeok Cho, Kyeongsoo Kim, Taewoong Eom, Moonyoung Kim, Jangwon Kim, Hoyoung Lee, Soyoung Lee, Jaehun Kim, Grace G. D. Han, Shin‐Tson Wu, Stefano Oscurato, Arri Priimagi, Marina Saphiannikova, Seungwoo Lee   +20 more
wiley   +1 more source

Second-harmonic radiation by on-chip integrable mirror-symmetric nanodimers with sub-nanometric plasmonic gap

Nanophotonics
Second-harmonic generation (SHG) facilitated by plasmonic nanostructures has drawn considerable attention, owing to its efficient frequency up-conversion at the nanoscale and potential applications in on-chip integration and nanophotonic devices. Herein,
Hu Junzheng, Ye Xiaofei, Huang Hui, Su Guangxu, Lv Zhekai, Qin Zhaofu, Hu Pan, Liu Fanxin, Wu Wei, Zhan Peng   +9 more
doaj   +1 more source

Strong second-harmonic generation by sublattice polarization in non-uniformly strained monolayer graphene

Nature Communications, 2023
Despite the potential of graphene for building a variety of quantum photonic devices, its centrosymmetric nature forbids the observation of second harmonic generation (SHG) for developing second-order nonlinear devices.
Kunze Lu, Manlin Luo, Weibo Gao, Qi Jie Wang, Hao Sun, Donguk Nam   +5 more
doaj   +1 more source

Electrically Tunable Heliconical Smectic Superstructure in Polar Fluids

Advanced Materials, EarlyView.
Strong dipole–dipole interactions give rise to an emergent polar smectic phase with spontaneous chiral symmetry breaking. This resulting polar heliconical smectic superstructure enables novel functionalities in polar fluids, such as color modulation driven by electric field strength and frequency, as well as second‐harmonic generation amplification ...
Hiroya Nishikawa, Dennis Kwaria, Atsuko Nihonyanagi, Koki Sano, Hiroyuki Yoshida, Fumito Araoka   +5 more
wiley   +1 more source

Disordered plasmonic system with dense copper nano-island morphology

Nanophotonics
Dry synthesis is a highly versatile method for the fabrication of nanoporous metal films, since it enables easy and reproducible deposition of single or multi-layers of nanostructured materials that can find intriguing applications in plasmonics ...
Tapani Tlek, Caligiuri Vincenzo, Zou Yanqiu, Griesi Andrea, Ivanov Yurii P., Cuscunà Massimo, Balestra Gianluca, Lin Haifeng, Sapunova Anastasiia, Franceschini Paolo, Tognazzi Andrea, De Angelis Costantino, Divitini Giorgio, Carzino Riccardo, Kwon Hyunah, Fischer Peer, Krahne Roman, Maccaferri Nicolò, Garoli Denis   +18 more
doaj   +1 more source

Caracterização demográfica e morfométrica das síndromes hipertensivas da gestação

Revista Eletrônica de Enfermagem, 2017
As Síndromes Hipertensivas da Gestação (SHG) possuem intensidade variável de acordo com seu tipo. Com este estudo objetivou-se descrever as características demográficas materno- fetais e as alterações morfométricas placentárias nos diferentes tipos de ...
Larissa Faquim Bazaga, Sanívia Aparecida de Lima Pereira, Renata Calciolari Rossi, Camila Lourencini Cavellani, Camila Souza de Oliveira Guimarães, Ana Karina Marques Salge, Vicente de Paula Antunes Teixeira, Eumenia Castro da Cunha Castro, Rosana Rosa Miranda Corrêa   +8 more
doaj   +1 more source

Reversible Hydration Tuning of Polar Order and Large Nonlinear Optical Response in a 2D van der Waals Crystal, LiInP2S6

Advanced Materials, EarlyView.
Hydration‐induced symmetry breaking transforms layered LiInP2S6${\rm LiInP}_2{\rm S}_6$ from a nonpolar to a chiral‐polar phase, producing a giant enhancement of non‐resonant second‐harmonic generation. The reversible tuning of polar order through molecular intercalation establishes a strategy for dynamically controlling nonlinear optical ...
Jadupati Nag, Saugata Sarker, Michael J. Waters, Safdar Imam, Himirkanti Sarkar, Anthony Richardella, James M. Rondinelli, Mercouri G. Kanatzidis, Venkatraman Gopalan   +8 more
wiley   +1 more source

Comparison of second harmonic generation from cross-polarized double-resonant metasurfaces on single crystals of Au

Nanophotonics, 2022
Second harmonic generation (SHG) from metasurfaces consisting of square array of split ring, heptagon and triangle cross-polarized double resonant resonators, is investigated both experimentally and numerically.
Habibullah Yusuf B., Ishihara Teruya
doaj   +1 more source

Reconfigurable Ferroelectric‐Like Two‐Dimensional Electron Gas at Room Temperature

Advanced Materials, EarlyView.
We demonstrate the realization of a novel ferroelectric‐like two‐dimensional electron gas (2DEG) based on the epitaxial interface between SrO‐terminate SrTiO3 and ferroeletric KNb0.5Na0.5O3${\rm KNb}_{0.5}{\rm Na}_{0.5}{\rm O}_3$ thin films. We show nonvolatile control of the transport properties enabling spatially reconfigurable devices in which ...
Martando Rath, Yu Chen, Daniela Stornaiuolo, Aravind Raji, Alexandre Gloter, Antonio Cassinese, Andrea Rubano, Alessia Sambri, Domenico Paparo, Emiliano Di Gennaro, Jérôme Lecourt, Wilfrid Prellier, Francesco Rosa, Nicholas B. Brookes, Giacomo Ghiringhelli, Daniele Preziosi, Marco Salluzzo   +16 more
wiley   +1 more source