Results 11 to 20 of about 661,323 (302)

A rapid microfluidic platform with real-time fluorescence detection system for molecular diagnosis

Biotechnology & Biotechnological Equipment, 2019
The development of microfluidics-based quantitative real-time polymerase chain reaction for molecular diagnosis is becoming a burgeoning field of research.
Zhigang Li, Jun Zhao, Xiaosong Wu, Cancan Zhu, Yong Liu, An Wang, Guoqing Deng, Ling Zhu   +7 more
doaj   +1 more source

Plasmonic Holographic Metasurfaces for Generation of Vector Optical Beams

IEEE Photonics Journal, 2017
In this paper, a 2-D anisotropic metasurface for generating an azimuthally polarized beam is structured with a patterned metallic layer, which is composed of a fork hologram and periodically aligned sector-shaped antennas in annular circles.
Jing Wen, Hui Feng, Jiannong Chen, Kang Wang, Yating Lv, Yangwan Zhong, Dawei Zhang   +6 more
doaj   +1 more source

Simultaneous Absolute Timing of the Crab Pulsar at Radio and Optical Wavelengths [PDF]

, 2008
The Crab pulsar emits across a large part of the electromagnetic spectrum. Determining the time delay between the emission at different wavelengths will allow to better constrain the site and mechanism of the emission. We have simultaneously observed the
A. Golden, A. Stankov, C. Erd, Cocke, Cognard, D. D. E. Martin, Dyks, Eikenberry, Golden, Hankins, Hewish, Hobbs, I. Cognard, J. A. Stüwe, Kanbach, Karpov, Kuiper, Lyne, Oosterbroek, P. Verhoeve, Percival, R. Schulz, Ramachandran, Romani, Romani, Rots, Shearer, Sollerman, Staelin, T. Ho, T. Oosterbroek, Takata   +31 more
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Fano resonances for high performance sensing in an asymmetric resonator based on hybrid graphene/dielectric metasurfaces

AIP Advances, 2021
Improving the performance and sensitivity of metallic sensors is challenging because of the Ohmic loss that occurs for traditional metallic materials.
Shuhua Cao, Qi Wang, Xufeng Gao, Shijie Zhang, Ruijin Hong, Dawei Zhang   +5 more
doaj   +1 more source

Nanoscale coherent imaging of photonic structures by PSTM [PDF]

, 2000
We present an alternative instrument to map local optical field distributions: a photon scanning tunneling microscope (PSTM). In a PSTM a near-field optical fiber probe is used to frustrate the evanescent field above an integrated optical device.
Balistreri, M.L.M., Flück, E., Hulst, N.F. van, Korterik, J.P., Kuipers, L.   +4 more
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High-Efficiency Plasmonic Lens Based on Archimedes-Spiral with Cross Section of an Asymmetric Slot

Crystals, 2022
A high-efficiency plasmonic lens composed of a single Archimedes-spiral slot with a cross section of an asymmetric slot is proposed. By adding an auxiliary nanocavity under the primary spiral slot, unidirectional plasmonic waves can be efficiently ...
Yangwan Zhong, Qi Wang, Jing Wen, Dawei Zhang, Songlin Zhuang   +4 more
doaj   +1 more source

Panoramic optical and near-infrared SETI instrument: prototype design and testing [PDF]

, 2018
The Pulsed All-sky Near-infrared Optical Search for ExtraTerrestrial Intelligence (PANOSETI) is an instrument program that aims to search for fast transient signals (nano-second to seconds) of artificial or astrophysical origin.
Antonio, Franklin, Aronson, Michael, Chaim-Weismann, Samuel A., Cosens, Maren, Drake, Frank D., Horowitz, Paul, Howard, Andrew W., Maire, Jérôme, Raffanti, Rick, Siemion, Andrew P. V., Stone, Remington P. S., Treffers, Richard R., Uttamchandani, Avinash, Werthimer, Dan, Wright, Shelley A.   +14 more
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The Classification of Optical Instruments [PDF]

Journal of the Optical Society of America, 1922
Exception is taken to the classification of optical instruments by the signs of their powers, and an alternative division comprising five classes is proposed, based upon the separation of the four Gaussian constants into two groups according to their signs. This classification cannot be modified by the addition to the system of inverting prisms and the
openaire   +2 more sources

Investigation of the Crystallization Characteristics of Intermediate States in Ge₂Sb₂Te₅ Thin Films Induced by Nanosecond Multi-Pulsed Laser Irradiation

Nanomaterials, 2022
Laser pulses can be utilized to induce intermediate states of phase change materials between amorphous and crystalline phases, making phase change materials attractive and applicable for multi-level storage applications.
Jia Du, Jun Zhou, Lianzhen Zhang, Na Yang, Xin Ding, Jin Zhang   +5 more
doaj   +1 more source

Femtosecond Red and Near-Infrared Lasers Due to Cascaded-Raman-Assisted Four-Wave Mixing in a Nonlinear Yb-Doped Fiber Amplifier

Applied Sciences, 2020
We demonstrated a straightforward approach to generate red and near-infrared laser emissions by a Raman-assisted four wave mixing (FWM) process in a nonlinear Yb-doped fiber amplifier, delivering 342 fs pulses of 241 nJ at 864 nm, 834 fs pulses of 21 nJ ...
Hui Xu, Shuai Yuan, Zhengru Guo, Qingshan Zhang, Yanying Ma, Qiang Hao, Kun Huang, Min Li, Yuan Nie, Heping Zeng   +9 more
doaj   +1 more source