Results 111 to 120 of about 2,694,501 (323)

Polymer Network Modified Perovskite for High‐Performance Pure Blue Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
A polymer network of poly(4‐vinylphenol) (PVPh) is introduced to improve pure blue perovskite light‐emitting diodes. PVPh effectively passivates defects, enhances film morphology, reduces lattice strain, and suppresses ion migration. These effects lead to record device performance, achieving 9.82% external quantum efficiency and stable blue emission at
Zhongkai Yu, Jiawei Hong, Jiaxin Song, Zihao Ren, Ke Zhou, Shengnan Liu, Minhui Yu, Yue Xu, Minjeong Ha, Yongbin Hua, Baodan Zhao, Bo Ram Lee   +11 more
wiley   +1 more source

Observation of Two‐Photon Resonant Raman Scattering via the Biexciton Level in Two‐Dimensional Halide Perovskite (C6H5C2H4NH3)2PbI4

Advanced Functional Materials, EarlyView.
Efficient two‐photon resonant Raman scattering (TRRS) is observed in the layered perovskite (PEA)2PbI4, with the biexciton level acting as an intermediate state. TRRS undergoes two‐photon frequency shift upon input frequency tuning, persists up to 90 K, and shows clear threshold behavior and polarization selection rules.
Seung Han Shin, Seo Hyun Nam, Jeehong Park, Dong Gyu Lee, Jeong Bin Cho, Tae Jung Kim, Yeonjin Yi, Joon Ik Jang   +7 more
wiley   +1 more source

Electromagnetic wave control of ceramic/resin photonic crystals with diamond structure

Science and Technology of Advanced Materials, 2004
Millimeter-order photonic crystals with the periodic arrangement of the dielectric constant were fabricated by infiltrating the mixed slurry of ceramics and polyester into the epoxy molds with an inverse form of a diamond structure.
Soshu Kirihara, Mitsuo Takeda, Kazuaki Sakoda and Yoshinari Miyamoto
doaj  

Slow-light enhanced optical detection in liquid-infiltrated photonic crystals

, 2007
Slow-light enhanced optical detection in liquid-infiltrated photonic crystals is theoretically studied. Using a scattering-matrix approach and the Wigner-Smith delay time concept, we show that optical absorbance benefits both from slow-light phenomena as
Mortensen, N. A., Pedersen, M. E. V., Rishoj, L. S., Steffensen, H., Xiao, S.   +4 more
core   +1 more source

High‐Throughput Exfoliation of Optoelectronic‐Grade MoS2 via Turbulent‐Flow Wet Jet Milling

Advanced Functional Materials, EarlyView.
A scalable wet jet milling exfoliation method is demonstrated for producing optoelectronic‐grade MoS2 nanosheets using environmentally friendly ethyl cellulose in ethanol dispersion media. Guided by fluid dynamics modeling, this approach is optimized to achieve record‐high exfoliation throughput and concentration.
Maryam Khalaj, Shreyash S. Hadke, Lindsay E. Chaney, Janan Hui, Thomas Birge, Linda Li, Vinod K. Sangwan, Mark C. Hersam   +7 more
wiley   +1 more source

Two-dimensional photonic band-gap mirrors at 850 and 980 nm [PDF]

, 1996
Summary form only given. Photonic band-gap (PBG) crystals can be fabricated in semiconductor devices through the etching of patterns of holes in the device, resulting in a periodic dielectric structure. One of the more practical uses of photonic crystals
Cheng, C. C., Lee, R., O'Brien, J., Painter, O., Scherer, A., Yariv, A.   +5 more
core  

Self-induced transparency and giant nonlinearity in doped photonic crystals

, 2002
Photonic crystals doped with resonant atoms allow for uniquely advantageous nonlinear modes of optical propagation: (a) Self-induced transparency (SIT) solitons and multi-dimensional localized "bullets" propagating at photonic band gap frequencies. These
Aceves, Aközbek, Blaauboer, Blaauboer, Boris Malomed, Cheng, Christodoulides, David Petrosyan, Eggleton, Feng, Gershon Kurizki, Greiner, Harris, Harris, Harris, Imamog?lu, John, John, Khitrova, Kimble, Kofman, Kozhekin, Kozhekin, Lambropoulos, Lukin, Mantsyzov, McCall, McCall, Miriam Blaauboer, Mossberg, Opatrný, Scalora, Scalora, Schmidt, Silberberg, Tomas Opatrny, Villeneuve, Winful, Yablonovitch, Yablonovitch   +39 more
core   +1 more source

Light‐Actuated Fiber‐Climbing Inchworm Robot Toward Endoluminal Navigation

Advanced Functional Materials, EarlyView.
A kirigami‐inspired soft inchworm robot harnesses optical energy from a customized side‐emitting optical fiber, guaranteeing its propulsion along the fiber body. The wavelength‐selective responsiveness of dye‐functionalized liquid crystal elastomers and the application of temporal illumination patterns enable sequential control of robot components. The
Antonio Lobosco, Leilei Song, Fan Liu, Yu‐Hsiang Lin, Venkatasubramanian Kalpathy Venkiteswaran, Hao Zeng, Sarthak Misra   +6 more
wiley   +1 more source

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Photonic crystals cause active colour change in chameleons

Nature Communications, 2015
Many chameleons, and panther chameleons in particular, have the remarkable ability to exhibit complex and rapid colour changes during social interactions such as male contests or courtship.
J. Teyssier, Suzanne V Saenko, D. van der Marel, M. Milinkovitch   +3 more
semanticscholar   +1 more source