Results 231 to 240 of about 656,663 (291)

Strain‐Tunable Photoluminescence From Ge Quantum Dots on Si Nanotips for CMOS‐Compatible Photonics

Advanced Physics Research, EarlyView.
This work studies strain in Ge quantum dots grown on Si nanotips using photoluminescence, X‐ray diffraction, and band structure calculations. It shows how emission changes with dot size, evaluates strain in the dot and substrate, and explains the role of direct and indirect transitions in the optical behavior.
Diana Ryzhak, Johannes Aberl, Enrique Prado‐Navarrete, Lada Vukušić, Oliver Skibitzki, Petr Klenovský, Marvin Hartwig Zoellner, Markus Andreas Schubert, Moritz Brehm, Davide Spirito, Giovanni Capellini   +10 more
wiley   +1 more source

Monolithic back-end-of-line integration of phase change materials into foundry-manufactured silicon photonics. [PDF]

Nat Commun
Wei M, Xu K, Tang B, Li J, Yun Y, Zhang P, Wu Y, Bao K, Lei K, Chen Z, Ma H, Sun C, Liu R, Li M, Li L, Lin H.   +15 more
europepmc   +1 more source

Rapid Lab‐Based In Situ Monitoring of Germanium Multiple Quantum Wells Interdiffusion

Advanced Physics Research, EarlyView.
This study emphasizes important insights into thermally activated diffusion control in Ge/SiGe multiple quantum wells for future design of high‐performance group‐IV optoelectronic devices. A particular fast data acquisition is achieved by in situ X‐ray diffraction and the influence of interdiffusion on the optical properties is presented by ...
Diana Ryzhak, Elena Campagna, Markus Andreas Schubert, Yuji Yamamoto, Oliver Skibitzki, Enrico Talamas Simola, Monica De Seta, Giovanni Capellini, Marvin Hartwig Zoellner   +8 more
wiley   +1 more source

Compositionally Engineered Carboxymethyl Cellulose‐Based Optical Fibers With Exceptionally Low Optical Loss and Quantitative Humidity Sensing

Advanced Physics Research, EarlyView.
Carboxymethyl cellulose‐based biopolymer optical fibers are fabricated using aqueous wet spinning. The fibers exhibit record‐low optical attenuation in polysaccharide‐based waveguides while maintaining efficient transmission across the visible‐to‐near‐infrared region of the electromagnetic spectrum.
Jani Patrakka, Alizee Sanouillet, Ville Hynninen, Nonappa   +3 more
wiley   +1 more source

Ultrafast RF Spectrum Analyzer Assisted by Optical Short‐Time Fourier Transform

Advanced Physics Research, EarlyView.
We present Recent efforts in an ultrafast RF spectrum analyzer based on the short‐time Fourier transform (STFT) at over 10 MHz frame rate and over 40GHz bandwidth to improve performance and support applications. All these efforts could inspire more innovative applications of temporal imaging modalities in the future.
Liao Chen, Yufan Du, Rongwu Liu, Chi Zhang, Xinliang Zhang   +4 more
wiley   +1 more source

Large-field-of-view optical-resolution optoacoustic microscopy using a stationary silicon-photonics acoustic detector. [PDF]

J Biomed Opt
Harary T, Nagli M, Suleymanov N, Goykhman I, Rosenthal A.   +4 more
europepmc   +1 more source

Cu Site Preference and Structural Evolution in Cu‐Doped BiMn7O12 Quadruple Perovskite

Advanced Physics Research, EarlyView.
Light Cu substitution in the quadruple perovskite BiMn7‐xCuxO12 progressively suppresses monoclinic distortion while enhancing local structural disorder and weakening magnetic order. Unexpected Cu site preferences inferred experimentally contrast with first‐principles predictions, revealing a delicate competition among local bonding, structural ...
Cheng Peng, Mingyu Xu, Jose L. Gonzalez Jimenez, Yang Zhang, Ismail El Baggari, Jie Li, Weiwei Xie   +6 more
wiley   +1 more source

A Simple Solvent Treatment to Modulate the Thermoelectric Properties of Single‐Walled Carbon Nanotubes over a Wide Range

Advanced Physics Research, EarlyView.
This study explores the use of single‐walled carbon nanotubes (SWCNTs) for thermoelectric (TE) applications to convert waste heat into electricity. By examining two SWCNT types with varying purity, structure, and thickness, it assesses how different solvents used in buckypaper fabrication affect their TE properties.
Marén Gültner, Dieter Fischer, Julia Lötsch, Susanne Boye, Petr Formanek, Johannes Theiner, Beate Krause   +6 more
wiley   +1 more source

Graphene Materials for Sustainable Energy Applications: A Contemporary Perspective

Carbon Energy, EarlyView.
ABSTRACT Graphene has garnered significant attention as a promising material with great potential for contributing to sustainable energy initiatives, such as RE100 (100% renewable energy initiative) and CF100 (100% carbon‐free initiative). This review aims to explore the potential of graphene for advancing renewable energy applications by highlighting
Niraj Kumar, Seul‐Yi Lee, Roop L. Mahajan, Soo‐Jin Park   +3 more
wiley   +1 more source