Characterization of SiGe quantum wire structures by cathodoluminescence imaging and spectroscopy

1995 ◽  
Vol 67 (12) ◽  
pp. 1709-1711 ◽  
Author(s):  
V. Higgs ◽  
E. C. Lightowlers ◽  
N. Usami ◽  
T. Mine ◽  
S. Fukatsu ◽  
...  
Keyword(s):  
Quantum Wire ◽  
Imaging And Spectroscopy ◽  
Cathodoluminescence Imaging

Characterization of Si/Si1−xGex/Si quantum wells by cathodoluminescence imaging and spectroscopy

1994 ◽  
Vol 64 (5) ◽  
pp. 607-609 ◽  
Author(s):  
V. Higgs ◽  
E. C. Lightowlers ◽  
X. Xiao ◽  
J. C. Sturm
Keyword(s):  
Quantum Wells ◽  
Imaging And Spectroscopy ◽  
Cathodoluminescence Imaging

Applying SEM-Cathodoluminescence imaging and spectroscopy as an advanced research tool for the characterization of archaeological material

2020 ◽  
Vol 158 ◽  
pp. 105230
Author(s):  
E. Palamara ◽  
P.P. Das ◽  
S. Nicolopoulos ◽  
L. Tormo Cifuentes ◽  
A. Oikonomou ◽  
...  
Keyword(s):  
Research Tool ◽  
Archaeological Material ◽  
Imaging And Spectroscopy ◽  
Cathodoluminescence Imaging

Multipixel characterization of imaging CZT detectors for hard x-ray imaging and spectroscopy

2004 ◽  
Author(s):  
Santosh V. Vadawale ◽  
Jae Sub Hong ◽  
Jonathan E. Grindlay ◽  
Peter Williams ◽  
Minhua Zhang ◽  
...  
Keyword(s):  
X Ray ◽  
X Ray Imaging ◽  
Imaging And Spectroscopy ◽  
Czt Detectors

Characterization of Si–C Covalent Bonding Fabricated between Single Carbon Nanotube and Si Substrate

2014 ◽  
Vol 543-547 ◽  
pp. 3711-3715
Author(s):  
Xia Liu ◽  
Lian Zhen Cao
Keyword(s):  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Covalent Bonding ◽  
Si Substrate ◽  
Covalent Bonds ◽  
Thermal Vapor Deposition ◽  
Individual Cnts ◽  
Imaging And Spectroscopy ◽  
Gas Blowing

The SiC covalent bonding between Carbon nanotube and Si substrate was fabricated by thermal vapor deposition using photolithography and gas blowing technology. Scanning electron microscopy, micro-Raman imaging and spectroscopy were used to investigate the interaction of individual CNTs and Si substrate. The characterization results showed that covalent bonds were formed between certain CNTs and Si substrate. Moreover, the reasons for the fabrication of SiC covalent bonding between CNTs and Si substrate were also proposed.

scholarly journals Optical validation and characterization of Planck PSZ2 sources at the Canary Islands observatories

2019 ◽  
Vol 628 ◽  
pp. A13 ◽  
Author(s):  
A. Streblyanska ◽  
A. Aguado-Barahona ◽  
A. Ferragamo ◽  
R. Barrena ◽  
J. A. Rubiño-Martín ◽  
...  
Keyword(s):  
Galaxy Clusters ◽  
Velocity Dispersion ◽  
First Year ◽  
Optical Information ◽  
Optical Counterpart ◽  
Optical Images ◽  
Spectroscopic Information ◽  
Imaging And Spectroscopy ◽  
Most Probable Explanation

Aims. The second catalogue of Planck Sunyaev–Zeldovich (SZ) sources, hereafter PSZ2, is the largest sample of galaxy clusters selected through their SZ signature in the full sky. At the time of publication, 21% of these objects had no known counterpart at other wavelengths. Using telescopes at the Canary Island observatories, we conducted the long-term observational programme 128-MULTIPLE-16/15B (hereafter LP15), a large and complete optical follow-up campaign of all the unidentified PSZ2 sources in the northern sky, with declinations above −15° and no correspondence in the first Planck catalogue PSZ1. The main aim of LP15 is to validate all those SZ cluster candidates, and to contribute to the characterization of the actual purity and completeness of full Planck SZ sample. In this paper, we describe the full programme and present the results of the first year of observations. Methods. The LP15 programme was awarded 44 observing nights, spread over two years in three telescopes at the Roque de los Muchachos Observatory. The full LP15 sample comprises 190 previously unidentified PSZ2 sources. For each target, we performed deep optical imaging and spectroscopy. Our validation procedure combined this optical information with SZ emission as traced by the publicly available Planck Compton y-maps. The final classification of the new galaxy clusters as optical counterparts of the SZ signal is established according to several quantitative criteria based on the redshift, velocity dispersion, and richness of the clusters. Results. This paper presents the detailed study of 106 objects out of the LP15 sample, corresponding to all the observations carried out during the first year of the programme. We confirmed the optical counterpart for 41 new PSZ2 sources, 31 of them being validated using also velocity dispersion based on our spectroscopic information. This is the largest dataset of newly confirmed PSZ2 sources without any previous optical information. All the confirmed counterparts are rich structures (i.e. they show high velocity dispersion), and are well aligned with the nominal Planck coordinates (i.e. ∼70% of them are located at less than 3′ distance). In total, 65 SZ sources are classified as unconfirmed, 57 of them being due to the absence of an optical over-density, and eight of them due to a weak association with the observed SZ decrement. Most of the sources with no optical counterpart are located at low galactic latitudes and present strong galactic cirrus in the optical images, the dust contamination being the most probable explanation for their inclusion in the PSZ2 catalogue.

Fabrication and microscopic characterization of a single quantum-wire laser with high uniformity

2004 ◽  
Vol 21 (2-4) ◽  
pp. 230-235 ◽  
Author(s):  
Masahiro Yoshita ◽  
Yuhei Hayamizu ◽  
Hidefumi Akiyama ◽  
Loren N. Pfeiffer ◽  
Ken W. West
Keyword(s):  
Quantum Wire ◽  
Single Quantum ◽  
High Uniformity
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