Results 101 to 110 of about 158,783 (289)

2 μm Broadband Amplification in Tapered Fiber Devices Using PbS Quantum Dots

Photonics
Broadband optical amplifiers operating in the 2 μm spectral region are critical for advancing mid-infrared photonic systems, yet achieving high gain with low noise remains challenging.
Deen Wang, Siyu Wan, Chenxi Wang, Zhiyang Jin, Xiaolan Sun, Alan R. Kost, Seppo Honkanen   +6 more
doaj   +1 more source

The effects of dust on the optical and infrared evolution of SN 2004et

, 2011
We present an analysis of multi-epoch observations of the Type II-P supernova SN 2004et. New and archival optical spectra of SN 2004et are used to study the evolution of the Halpha and [O I] 6300A line profiles between days 259 and 646.
Andrews, Andrews, B. E. K. Sugerman, B. Ercolano, Barlow, Benetti, Bertoldi, Bianchi, Bohlin, Bouchet, Branch, Cardelli, D. L. Welch, Danziger, Dolphin, Dolphin, Draine, Ducati, Dwek, Dwek, Ercolano, Ercolano, Ercolano, Evans, Fabbri, Filippenko, Filippenko, Fitzgerald, Fransson, Geoffrey C. Clayton, Gerardy, Glass, Gordon, Hamuy, Herrmann, J. E. Andrews, J. Fabbri, Joseph S. Gallagher, Karachentsev, Kennicutt, Kirshner, Kotak, Kotak, Kozasa, Li, Li, Lucy, M. J. Barlow, M. Meixner, M. Otsuka, Maguire, Maiolino, Makovoz, Mathis, Meikle, Meikle, Meixner, Misra, Nozawa, Nugent, Panagia, Patat, Pozzo, R. Wesson, Richardson, Sahu, Schlegel, Stetson, Sugerman, Sugerman, Sugerman, Suntzeff, Szalai, Thatte, Todini, Tomaney, Walker, Welch, Wesson, Wooden, Woosley, Zubko, Zwitter   +82 more
core   +2 more sources

Broadband mid-infrared coherent light source from fiber-laser-pumped difference frequency generators based on cascaded crystals

Optics Express, 2020
We present difference frequency generators (DFGs) using cascaded PPLN crystals, each with a distinct poling-period, as the parametric gain medium. We show that the phase-matching bandwidth of cascaded crystals is the combination of that of each individual crystal. In the non-phase-matched section of cascaded crystals, there exists periodic backward and
Xi, Feng, Jinqiao, Shi, Pei, Liu, Zhaowei, Zhang   +3 more
openaire   +2 more sources

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

Advanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief, Swagato Sarkar, Anik Kumar Ghosh, Osvalds Verners, Kamal Kumar Meena, Su‐Hyeong Lee, Soosang Chae, Tobias A. F. König, Beate Krause, Andreas Fery, Mehmet Sait Özer, Anindya Nag, Amit Das   +12 more
wiley   +1 more source

Synthesizing gas-filled anti-resonant hollow-core fiber Raman lines enables access to the molecular fingerprint region

Nature Communications
The synthesis of multiple narrow optical spectral lines, precisely and independently tuned across the near- to mid-infrared region, is a pivotal research area that enables selective and real-time detection of trace gas species within complex gas mixtures.
Yazhou Wang, Lujun Hong, Cuiling Zhang, Joseph Wahlen, J. E. Antonio-Lopez, Manoj K. Dasa, Abubakar I. Adamu, Rodrigo Amezcua-Correa, Christos Markos   +8 more
doaj   +1 more source

Direct Synthesis of High‐Valence Protein@UiO‐66 Composites: Linking Crystallization Pathways to Protein Encapsulation

Advanced Materials, EarlyView.
This work reports a direct, biocompatible method to synthesize UiO‐66, enabling one‐step encapsulation of proteins without compromising crystallinity or activity. Using advanced in situ and ex situ techniques, the study reveals that proteins integrate concurrently with MOF growth, forming crystalline protein@UiO‐66 nanoparticles, and provide insight ...
Jesús Cases Díaz, Jana Glatz, Elisa Merced Olivas, Ramon Pons, Joseph P. Patterson, Mónica Giménez‐Marqués   +5 more
wiley   +1 more source

Insights into galaxy evolution from mid-infrared wavelengths [PDF]

, 2007
In this paper, I have attempted to highlight key results from deep extragalactic surveys at mid-infrared wavelengths. I discuss advances in our understanding of dust enshrouded star-formation and AGN activity at 0 3 will become possible only with future
Chary, Ranga-Ram
core  

Multifunctional Bio‐Based Packaging for Perishable Foods: Structural Design, Scalable Fabrication, and Versatile Applications

Advanced Materials, EarlyView.
An overview of design principles and scalable fabrication strategies for multifunctional bio‐based packaging. Radiative cooling films, modified‐atmosphere films/membranes, active antimicrobial/antioxidant platforms, intelligent optical/electrochemical labels, and superhydrophobic surfaces are co‐engineered from material chemistry to mesoscale structure
Lei Zhang, Jiaqi Zhang, Mei Cui, Wei Qi, Renliang Huang, Rongxin Su, Kai Zhang   +6 more
wiley   +1 more source

Efficient High-Power Ultrashort Pulse Compression in Self-Defocusing Bulk Media

Scientific Reports, 2017
Peak and average power scalability is the key feature of advancing femtosecond laser technology. Today, near-infrared light sources are capable of providing hundreds of Watts of average power.
Marcus Seidel, Jonathan Brons, Gunnar Arisholm, Kilian Fritsch, Vladimir Pervak, Oleg Pronin   +5 more
doaj   +1 more source

Phase‐Pure and Size‐Tunable Tin Halide Perovskite Quantum Dots

Advanced Materials, EarlyView.
A trioctylphosphine oxide modulated protocol allows for the synthesis and study of the optical properties of a broad library of tin halide perovskite quantum dots across multiple A‐ and X‐site compositions with precise size tuning while eliminating unwanted 2D phases.
Ole F. Dressler, Benjamin Aymoz, Sebastian Sabisch, Stefanie Frick, Sebastian Siol, Dmitry N. Dirin, Simon C. Boehme, Maksym V. Kovalenko   +7 more
wiley   +1 more source