scholarly journals Ultrasensitive nonlinear absorption response of large-size topological insulator and application in low-threshold bulk pulsed lasers

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Jin-Long Xu ◽  
Yi-Jian Sun ◽  
Jing-Liang He ◽  
Yan Wang ◽  
Zhao-Jie Zhu ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Nonlinear Absorption ◽  
Pulsed Lasers ◽  
Large Size ◽  
Low Threshold

Intense low threshold nonlinear absorption and nonlinear refraction in a new organic–polymer nanocomposite

2011 ◽  
Vol 129 (3) ◽  
pp. 981-989 ◽  
Author(s):  
P.G. Louie Frobel ◽  
S.R. Suresh ◽  
S. Mayadevi ◽  
S. Sreeja ◽  
Chandrachur Mukherjee ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Refraction ◽  
Polymer Nanocomposite ◽  
Organic Polymer ◽  
Low Threshold

Nonlinear Absorption and Low-Threshold Multiphoton Pumped Stimulated Emission from All-Inorganic Perovskite Nanocrystals

Nano Letters ◽  
2015 ◽  
Vol 16 (1) ◽  
pp. 448-453 ◽  
Author(s):  
Yue Wang ◽  
Xiaoming Li ◽  
Xin Zhao ◽  
Lian Xiao ◽  
Haibo Zeng ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Stimulated Emission ◽  
Inorganic Perovskite ◽  
Perovskite Nanocrystals ◽  
Low Threshold

scholarly journals Ultralow-threshold up-converted lasing in oligofluorenes with tailored strong nonlinear absorption

2015 ◽  
Vol 3 (46) ◽  
pp. 12018-12025 ◽  
Author(s):  
Burak Guzelturk ◽  
Alexander L. Kanibolotsky ◽  
Clara Orofino-Pena ◽  
Nicolas Laurand ◽  
Martin D. Dawson ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Low Threshold

A frequency up-converted laser using star-shaped oligomers based on the truxene-core is demonstrated with an ultra-low threshold of 3.1 mJ cm−2.

scholarly journals High-quality and Large-size Topological Insulator Bi2Te3-Gold Saturable Absorber Mirror for Mode-Locking Fiber Laser

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Hou-Ren Chen ◽  
Chih-Ya Tsai ◽  
Hsin-Ming Cheng ◽  
Kuei-Huei Lin ◽  
Po-Hsiu Yen ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Saturable Absorber ◽  
Topological Insulator ◽  
Mode Locking ◽  
High Quality ◽  
Large Size

Coherency loss in γ' precipitates in nickel-base superalloy

1983 ◽  
Vol 41 ◽  
pp. 244-245
Author(s):  
R. A. Ricks ◽  
Angus J. Porter
Keyword(s):  
Lattice Mismatch ◽  
Lattice Parameter ◽  
Nickel Base Superalloy ◽  
Large Size ◽  
The Matrix ◽  
Nimonic 80A ◽  
Interfacial Dislocations ◽  
Nickel Base ◽  
Coherency Loss ◽  
Nimonic 115

During a recent investigation concerning the growth of γ' precipitates in nickel-base superalloys it was observed that the sign of the lattice mismatch between the coherent particles and the matrix (γ) was important in determining the ease with which matrix dislocations could be incorporated into the interface to relieve coherency strains. Thus alloys with a negative misfit (ie. the γ' lattice parameter was smaller than the matrix) could lose coherency easily and γ/γ' interfaces would exhibit regularly spaced networks of dislocations, as shown in figure 1 for the case of Nimonic 115 (misfit = -0.15%). In contrast, γ' particles in alloys with a positive misfit could grow to a large size and not show any such dislocation arrangements in the interface, thus indicating that coherency had not been lost. Figure 2 depicts a large γ' precipitate in Nimonic 80A (misfit = +0.32%) showing few interfacial dislocations.

Automatic analysis of Kikuchi diffraction patterns

1994 ◽  
Vol 52 ◽  
pp. 900-901
Author(s):  
H. Weiland ◽  
D. P. Field
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Spatial Resolution ◽  
Relevant Information ◽  
Crystalline Materials ◽  
Large Size ◽  
Transmission Electron ◽  
New Type ◽  
Diffraction Patterns ◽  
Orientation Determination

Recent advances in the automatic indexing of backscatter Kikuchi diffraction patterns on the scanning electron microscope (SEM) has resulted in the development of a new type of microscopy. The ability to obtain statistically relevant information on the spatial distribution of crystallite orientations is giving rise to new insight into polycrystalline microstructures and their relation to materials properties. A limitation of the technique in the SEM is that the spatial resolution of the measurement is restricted by the relatively large size of the electron beam in relation to various microstructural features. Typically the spatial resolution in the SEM is limited to about half a micron or greater. Heavily worked structures exhibit microstructural features much finer than this and require resolution on the order of nanometers for accurate characterization. Transmission electron microscope (TEM) techniques offer sufficient resolution to investigate heavily worked crystalline materials.Crystal lattice orientation determination from Kikuchi diffraction patterns in the TEM (Figure 1) requires knowledge of the relative positions of at least three non-parallel Kikuchi line pairs in relation to the crystallite and the electron beam.

Immunoprobe localization in mammalian embryos

1990 ◽  
Vol 48 (3) ◽  
pp. 32-33
Author(s):  
Patricia G. Calarco ◽  
Margaret C. Siebert
Keyword(s):  
Electron Microscopy ◽  
Endoplasmic Reticulum ◽  
Thin Sections ◽  
Relative Lack ◽  
Large Size ◽  
Mammalian Embryos ◽  
Antigen Localization ◽  
Difficult Challenge ◽  
Lowicryl K4m ◽  
Fertilized Egg

Visualization of preimplantation mammalian embryos by electron microscopy is difficult due to the large size of the ircells, their relative lack of internal structure, and their highly hydrated cytoplasm. For example, the fertilized egg of the mouse is a single cell of approximately 75μ in diameter with little organized cytoskelet on and apaucity ofor ganelles such as endoplasmic reticulum (ER) and Golgi material. Thus, techniques that work well on tissues or cell lines are often not adaptable to embryos at either the LM or EM level.Over several years we have perfected techniques for visualization of mammalian embryos by LM and TEM, SEM and for the pre-embedding localization of antigens. Post-embedding antigenlocalization in thin sections of mouse oocytes and embryos has presented a more difficult challenge and has been explored in LR White, LR Gold, soft EPON (after etching of sections), and Lowicryl K4M. To date, antigen localization has only been achieved in Lowicryl-embedded material, although even with polymerization at-40°C, the small ER vesicles characteristic of embryos are unrecognizable.

Vibration Isolator System for Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 182-183
Author(s):  
K. Ohi ◽  
M. Mizuno ◽  
T. Kasai ◽  
Y. Ohkura ◽  
K. Mizuno ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Fields ◽  
Environmental Conditions ◽  
Vibration Isolator ◽  
Air Conditioners ◽  
Vibration Isolators ◽  
Large Size ◽  
Electron Microscopes

In recent years, with electron microscopes coming into wider use, their installation environments do not necessarily give their performance full play. Their environmental conditions include air-conditioners, magnetic fields, and vibrations. We report a jointly developed entirely new vibration isolator which is effective against the vibrations transmitted from the floor.Conventionally, large-sized vibration isolators which need the digging of a pit have been used. These vibration isolators, however, are large present problems of installation and maintenance because of their large-size.Thus, we intended to make a vibration isolator which1) eliminates the need for changing the installation room2) eliminates the need of maintenance and3) are compact in size and easily installable.

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