Results 11 to 20 of about 655,744 (304)

A compact holographic optical tweezers instrument [PDF]

, 2012
Holographic optical tweezers have found many applications including the construction of complex micron-scale 3D structures and the control of tools and probes for position, force, and viscosity measurement.
Bowman, R.W., Carberry, D.M., Dienerowitz, M., Gibson, G.M., Linnenberger, A., Miles, M.J., Padgett, M.J., Phillips, David   +7 more
core   +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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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

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

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

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

Panoramic optical and near-infrared SETI instrument: optical and structural design concepts [PDF]

, 2018
We propose a novel instrument design to greatly expand the current optical and near-infrared SETI search parameter space by monitoring the entire observable sky during all observable time.
Ackermann, Angel, Bunner, Chambers, Davis, Davis, Ellingson, Fujii, Howard, Law, Maire, Maire, Mészáros, Oosterloo, Petigura, Wright, Wright   +16 more
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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

Thermally Tunable Orbital Angular Momentum Mode Generator Based on Dual-Core Photonic Crystal Fibers

Nanomaterials, 2021
The combination of mode division multiplexing (MDM) based on orbital angular momentum (OAM) modes with wavelength division multiplexing (WDM) has attracted considerable attention due to its ability to increase optical transmission capacity.
Lianzhen Zhang, Xuedian Zhang, Xuejing Liu, Jun Zhou, Na Yang, Jia Du, Xin Ding   +6 more
doaj   +1 more source

Performance and on-sky optical characterization of the SPTpol instrument [PDF]

, 2012
In January 2012, the 10m South Pole Telescope (SPT) was equipped with a polarization-sensitive camera, SPTpol, in order to measure the polarization anisotropy of the cosmic microwave background (CMB).
Ade, P., Aird, K. A., Austermann, J. E., Beall, J. A., Becker, D., Bender, A., Benson, B. A., Bleem, L. E., Britton, J., Carlstrom, J. E., Chang, C. L., Chiang, H. C., Cho, H-M., Crawford, T. M., Crites, A. T., Datesman, A., de Haan, T., Dobbs, M. A., Everett, W., Ewall-Wice, A., George, E. M., Halverson, N. W., Harrington, N., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Hoover, S., Huang, N., Hubmayr, J., Irwin, K. D., Karfunkle, M., Keisler, R., Kennedy, J., Lee, A. T., Leitch, E., Li, D., Lueker, M., Marrone, D. P., McMahon, J. J., Mehl, J., Meyer, S. S., Montgomery, J., Montroy, T. E., Nagy, J., Natoli, T., Nibarger, J. P., Niemack, M. D., Novosad, V., Padin, S., Pryke, C., Reichardt, C. L., Ruhl, J. E., Saliwanchik, B. R., Sayre, J. T., Schaffer, K. K., Shirokoff, E., Story, K., Tucker, C., Vanderlinde, K., Vieira, J. D., Wang, G., Williamson, R., Yefremenko, V., Yoon, K. W., Young, E.   +64 more
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