scholarly journals Three-Dimensional Cooling of an Atom-Beam Source for High-Contrast Atom Interferometry

2020 ◽  
Vol 13 (4) ◽  
Author(s):  
J.M. Kwolek ◽  
C.T. Fancher ◽  
M. Bashkansky ◽  
A.T. Black
Keyword(s):  
Three Dimensional ◽  
Atom Interferometry ◽  
High Contrast ◽  
Atom Beam ◽  
Beam Source

Confocal laser microscopy of impregnated central nervous system tissue

1988 ◽  
Vol 46 ◽  
pp. 94-95
Author(s):  
J.N. Turner ◽  
M. Siemens ◽  
D. Szarowski ◽  
D.N. Collins
Keyword(s):  
Electron Microscopy ◽  
Central Nervous System ◽  
Nervous System ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Confocal Laser ◽  
High Contrast ◽  
Central Nervous System Tissue ◽  
Tissue Samples ◽  
Reflected Light

A classic preparation of central nervous system tissue (CNS) is the Golgi procedure popularized by Cajal. The method is partially specific as only a few cells are impregnated with silver chromate usualy after osmium post fixation. Samples are observable by light (LM) or electron microscopy (EM). However, the impregnation is often so dense that structures are masked in EM, and the osmium background may be undesirable in LM. Gold toning is used for a subtle but high contrast EM preparation, and osmium can be omitted for LM. We are investigating these preparations as part of a study to develop correlative LM and EM (particularly HVEM) methodologies in neurobiology. Confocal light microscopy is particularly useful as the impregnated cells have extensive three-dimensional structure in tissue samples from one to several hundred micrometers thick. Boyde has observed similar preparations in the tandem scanning reflected light microscope (TSRLM).

scholarly journals Electromechanically reconfigurable optical nano-kirigami

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shanshan Chen ◽  
Zhiguang Liu ◽  
Huifeng Du ◽  
Chengchun Tang ◽  
Chang-Yin Ji ◽  
...  
Keyword(s):  
Near Infrared ◽  
Large Range ◽  
Three Dimensional ◽  
High Contrast ◽  
Si Substrate ◽  
High Modulation ◽  
Gold Nanostructure ◽  
Infrared Wavelengths ◽  
On Chip ◽  
Nano Electromechanical System

AbstractKirigami, with facile and automated fashion of three-dimensional (3D) transformations, offers an unconventional approach for realizing cutting-edge optical nano-electromechanical systems. Here, we demonstrate an on-chip and electromechanically reconfigurable nano-kirigami with optical functionalities. The nano-electromechanical system is built on an Au/SiO2/Si substrate and operated via attractive electrostatic forces between the top gold nanostructure and bottom silicon substrate. Large-range nano-kirigami like 3D deformations are clearly observed and reversibly engineered, with scalable pitch size down to 0.975 μm. Broadband nonresonant and narrowband resonant optical reconfigurations are achieved at visible and near-infrared wavelengths, respectively, with a high modulation contrast up to 494%. On-chip modulation of optical helicity is further demonstrated in submicron nano-kirigami at near-infrared wavelengths. Such small-size and high-contrast reconfigurable optical nano-kirigami provides advanced methodologies and platforms for versatile on-chip manipulation of light at nanoscale.

Atom beam source

Vacuum ◽  
1984 ◽  
Vol 34 (1-2) ◽  
pp. 259-261 ◽  
Author(s):  
J Franks
Keyword(s):  
Atom Beam ◽  
Beam Source

scholarly journals High contrast three-dimensional photoacoustic imaging through scattering media by localized optical fluence enhancement

2013 ◽  
Vol 21 (22) ◽  
pp. 26671 ◽  
Author(s):  
Antonio M. Caravaca-Aguirre ◽  
Donald B. Conkey ◽  
Jacob D. Dove ◽  
Hengyi Ju ◽  
Todd W. Murray ◽  
...  
Keyword(s):  
Photoacoustic Imaging ◽  
Three Dimensional ◽  
High Contrast ◽  
Scattering Media

Characterization of a saddle field fast atom beam source

Vacuum ◽  
1988 ◽  
Vol 38 (2) ◽  
pp. 111-115 ◽  
Author(s):  
SO Saied ◽  
JL Sullivan ◽  
RK Fitch
Keyword(s):  
Atom Beam ◽  
Beam Source ◽  
Fast Atom Beam
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