Results 61 to 70 of about 722 (280)

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

Azaporphyrinoid‐Based Photo‐ and Electroactive Architectures for Advanced Functional Materials

Advanced Materials, EarlyView.
A long‐standing collaboration between the Torres and Guldi groups has yielded diverse azaporphyrinoid‐based donor‐acceptor nanohybrids with promising applications in solar energy conversion. This conspectus highlights key molecular platforms and structure‐function relationships that govern light and charge management, supporting the rational design of ...
Jorge Labella, Kobra Azizi, Dirk M. Guldi, Tomás Torres   +3 more
wiley   +1 more source

The Microloop-Gap Resonator: A Novel Miniaturized Microwave Cavity for Double-Resonance Rubidium Atomic Clocks [PDF]

, 2014
Nowadays mobile and battery-powered applications push the need for radically miniaturized and low-power frequency standards that surpass the stability achievable with quartz oscillators. For the miniaturization of double-resonance rubidium (Rb-87) atomic
Violetti, Maddalena, Pellaton, Matthieu, Skrivervik, Anja K., Mileti, Gaetano, Merli, Francesco, Affolderbach, Christoph, Zuercher, Jean-Francois   +6 more
core   +2 more sources

Stabilized Radio Frequency Transfer via 100 km Urban Optical Fiber Link Using Passive Compensation Method

IEEE Access, 2019
A point to point stable radio frequency (RF) signal transfer scheme is proposed and experimentally demonstrated via 100 km noisy urban optical fiber link in Beijing area.
Chenxia Liu, Shujin Zhou, Jianming Shang, Zhuoze Zhao, Hao Gao, Xing Chen, Song Yu   +6 more
doaj   +1 more source

Atomic Clocks in Space: A Search for Rubidium and Cesium Masers in M- and L-dwarfs

Research Notes of the AAS, 2021
Abstract I searched for the ground state 6.8 and 9.2 GHz hyperfine transitions of rubidium and cesium toward M- and L-dwarfs that show Rb and Cs optical resonance lines. The optical lines can pump the hyperfine transitions, potentially forming masers.
openaire   +2 more sources

Emergent Spin Supersolids in Frustrated Quantum Materials

Advanced Materials, EarlyView.
This review highlights developments in the study of spin super‐solids in frustrated quantum materials. Advanced experimental characterizations and computational studies enable a comprehensive understanding of the driving mechanisms of spin super‐solidity in various layered transition‐metal compounds, bridging materials, experiments, and theory aspects.
Yixuan Huang, Seiji Yunoki, Sadamichi Maekawa   +2 more
wiley   +1 more source

Low-Phase-Noise 10.23 MHz Satellite Navigation Reference Generation Based on 10th-Harmonic-Locked NALM Fiber Laser

Photonics
This paper proposes a method to generate a low-noise 10.23 MHz time-frequency reference signal based on high-order harmonic locking of the repetition rate (fr) of an optical frequency comb (OFC).
Nanhui Xu, Pengpeng Yan, Zhaoyang Li, Leijun Xu, Heng Hu, Xuesen Xu, Qi’an Wang, Weiming Xu, Rong Shu   +8 more
doaj   +1 more source

Microfabricated Vapor Cells with Reflective Sidewalls for Chip Scale Atomic Sensors

Micromachines, 2018
We investigate the architecture of microfabricated vapor cells with reflective sidewalls for applications in chip scale atomic sensors. The optical configuration in operation is suitable for both one-beam and two-beam (pump & probe) schemes.
Runqi Han, Zheng You, Fan Zhang, Hongbo Xue, Yong Ruan   +4 more
doaj   +1 more source

Conductive Hydrogels for Exogenous Sensing and Cell Fate Control

Advanced Materials, EarlyView.
We engineer electrically conductive hydrogels by combining sulfated glycosaminoglycans with semiconducting polymers. These hydrogels bind bioactive proteins, including growth factors, whose release or retention can be modulated by low‐voltage stimulation. The hydrogels are also integrated as 3D channels in organic electrochemical transistors as part of
Teuku Fawzul Akbar, Carlos Alejandro Jimenez‐Rodriguez, Railia Biktimirova, Ilka Hermes, Thomas Kurth, My Duyen Pham, Mikhail Tsurkan, Jens Friedrichs, Francis L. C. Morgan, Hans Kleemann, Olga Guskova, Uwe Freudenberg, Peter Fratzl, Carsten Werner, Christoph Tondera, Ivan R. Minev   +15 more
wiley   +1 more source

Spectral emission from the alkali inductively-coupled plasma: Theory and experiment

AIP Advances, 2018
The weakly-ionized, alkali inductively-coupled plasma (ICP) has a long history as the light source for optical pumping. Today, its most significant application is perhaps in the rubidium atomic frequency standard (RAFS), arguably the workhorse of atomic ...
R. Bazurto, M. Huang, J. Camparo
doaj   +1 more source