scholarly journals Generation of high-quality circular Airy beams in laser resonator

2020 ◽  
Vol 69 (1) ◽  
pp. 014205
Author(s):  
Yi-Fan Zhu ◽  
Tao Geng
Keyword(s):  
Laser Resonator ◽  
High Quality ◽  
Airy Beams

Generation of high quality Airy beams with blazed micro-optical cubic phase plates

2011 ◽  
Vol 50 (36) ◽  
pp. 6627 ◽  
Author(s):  
Jingang Wang ◽  
Jing Bu ◽  
Mingwei Wang ◽  
Yong Yang ◽  
Xiaocong Yuan
Keyword(s):  
Cubic Phase ◽  
High Quality ◽  
Phase Plates ◽  
Airy Beams

scholarly journals Generation of High-Quality Tunable One-Dimensional Airy Beams Using the Aberrations of a Single Lens

2012 ◽  
Vol 4 (5) ◽  
pp. 1273-1280 ◽  
Author(s):  
P. Acebal ◽  
L. Carretero ◽  
S. Blaya ◽  
A. Murciano
Keyword(s):  
High Quality ◽  
One Dimensional ◽  
Single Lens ◽  
Airy Beams

Generation of high-quality tunable Airy beams with an adaptive deformable mirror

2018 ◽  
Vol 43 (15) ◽  
pp. 3634 ◽  
Author(s):  
Jianqiang Ma ◽  
Yan Li ◽  
Qizhi Yu ◽  
Zongfeng Yang ◽  
Yanlei Hu ◽  
...  
Keyword(s):  
Deformable Mirror ◽  
High Quality ◽  
Airy Beams

Continuous cubic phase microplates for generating high-quality Airy beams with strong deflection

2017 ◽  
Vol 42 (13) ◽  
pp. 2483 ◽  
Author(s):  
Ze Cai ◽  
Ya Liu ◽  
Chenchu Zhang ◽  
Jiangchuan Xu ◽  
Shengyun Ji ◽  
...  
Keyword(s):  
Cubic Phase ◽  
High Quality ◽  
Airy Beams

Formation of high-quality vortex laser beams with different orbital angular momenta in the laser resonator

2018 ◽  
Vol 35 (9) ◽  
pp. 1599 ◽  
Author(s):  
Liying Zhang ◽  
Tao Geng ◽  
Xiumin Gao ◽  
Songlin Zhuang ◽  
Jinling Lian
Keyword(s):  
Laser Beams ◽  
Laser Resonator ◽  
High Quality ◽  
Angular Momenta

Broadband high-quality airy beams via lossy acoustic gradient-index metasurfaces

2020 ◽  
Vol 308 ◽  
pp. 113810
Author(s):  
Ming Xia ◽  
Xin Zhang ◽  
Fugen Wu ◽  
Licheng Wang ◽  
Yuechang Liu ◽  
...  
Keyword(s):  
Gradient Index ◽  
High Quality ◽  
Airy Beams

Some problems of objective-prism spectra classification

1966 ◽  
Vol 24 ◽  
pp. 51-52
Author(s):  
E. K. Kharadze ◽  
R. A. Bartaya
Keyword(s):  
Short Wave ◽  
High Quality ◽  
Stellar Spectra ◽  
Objective Prism

The unique 70-cm meniscus-type telescope of the Abastumani Astrophysical Observatory supplied with two objective prisms and the seeing conditions characteristic at Mount Kanobili (Abastumani) permit us to obtain stellar spectra of a high quality. No additional design to improve the “climate” immediately around the telescope itself is being applied. The dispersions and photographic magnitude limits are 160 and 660Å/mm, and 12–13, respectively. The short-wave end of spectra reaches 3500–3400Å.

A non-cyanide method of electropolishing silver

1978 ◽  
Vol 36 (1) ◽  
pp. 146-147
Author(s):  
R. L. Lyles ◽  
S. J. Rothman ◽  
W. Jäger
Keyword(s):  
Electron Microscopy ◽  
Sulphuric Acid ◽  
Methyl Alcohol ◽  
Health Hazards ◽  
Silver Alloy ◽  
High Quality ◽  
Silver Alloys ◽  
Free Sample ◽  
Specimen Quality ◽  
Standard Techniques

Standard techniques of electropolishing silver and silver alloys for electron microscopy in most instances have relied on various CN recipes. These methods have been characteristically unsatisfactory due to difficulties in obtaining large electron transparent areas, reproducible results, adequate solution lifetimes, and contamination free sample surfaces. In addition, there are the inherent health hazards associated with the use of CN solutions. Various attempts to develop noncyanic methods of electropolishing specimens for electron microscopy have not been successful in that the specimen quality problems encountered with the CN solutions have also existed in the previously proposed non-cyanic methods.The technique we describe allows us to jet polish high quality silver and silver alloy microscope specimens with consistant reproducibility and without the use of CN salts.The solution is similar to that suggested by Myschoyaev et al. It consists, in order of mixing, 115ml glacial actic acid (CH3CO2H, specific wt 1.04 g/ml), 43ml sulphuric acid (H2SO4, specific wt. g/ml), 350 ml anhydrous methyl alcohol, and 77 g thiourea (NH2CSNH2).

A High Resolution Scanning Microscope

1968 ◽  
Vol 26 ◽  
pp. 356-357
Author(s):  
A. V. Crewe ◽  
J. Wall ◽  
L. M. Welter
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Spherical Aberration ◽  
Focal Length ◽  
Spot Size ◽  
Emission Source ◽  
Field Of View ◽  
Scanning Microscope ◽  
Magnetic Lens ◽  
High Quality

A scanning microscope using a field emission source has been described elsewhere. This microscope has now been improved by replacing the single magnetic lens with a high quality lens of the type described by Ruska. This lens has a focal length of 1 mm and a spherical aberration coefficient of 0.5 mm. The final spot size, and therefore the microscope resolution, is limited by the aberration of this lens to about 6 Å.The lens has been constructed very carefully, maintaining a tolerance of + 1 μ on all critical surfaces. The gun is prealigned on the lens to form a compact unit. The only mechanical adjustments are those which control the specimen and the tip positions. The microscope can be used in two modes. With the lens off and the gun focused on the specimen, the resolution is 250 Å over an undistorted field of view of 2 mm. With the lens on,the resolution is 20 Å or better over a field of view of 40 microns. The magnification can be accurately varied by attenuating the raster current.

Quantitative defect studies in semiconductor TEM samples prepared by low angle ion milling

1995 ◽  
Vol 53 ◽  
pp. 512-513
Author(s):  
L. Mulestagno ◽  
J.C. Holzer ◽  
P. Fraundorf
Keyword(s):  
Sample Preparation ◽  
Milling Time ◽  
High Density ◽  
Low Density ◽  
Ion Milling ◽  
High Quality ◽  
Variable Angle ◽  
Major Disadvantage ◽  
Induced Defects

Due to the wealth of information, both analytical and structural that can be obtained from it TEM always has been a favorite tool for the analysis of process-induced defects in semiconductor wafers. The only major disadvantage has always been, that the volume under study in the TEM is relatively small, making it difficult to locate low density defects, and sample preparation is a somewhat lengthy procedure. This problem has been somewhat alleviated by the availability of efficient low angle milling.Using a PIPS® variable angle ion -mill, manufactured by Gatan, we have been consistently obtaining planar specimens with a high quality thin area in excess of 5 × 104 μm2 in about half an hour (milling time), which has made it possible to locate defects at lower densities, or, for defects of relatively high density, obtain information which is statistically more significant (table 1).

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