Very high current density pseudomorphic double channel In0.49Ga0.51P/In0.3Ga0.7As/GaAs HEMT

1997 ◽  
Vol 33 (7) ◽  
pp. 627 ◽  
Author(s):  
H.-P.D. Yang ◽  
F.C. Hwang
Keyword(s):  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Double Channel ◽  
Very High

scholarly journals Very high-current-density Nb/AlN/Nb tunnel junctions for low-noise submillimeter mixers

2000 ◽  
Vol 76 (15) ◽  
pp. 2119-2121 ◽  
Author(s):  
Jonathan Kawamura ◽  
David Miller ◽  
Jian Chen ◽  
Jonas Zmuidzinas ◽  
Bruce Bumble ◽  
...  
Keyword(s):  
Current Density ◽  
Tunnel Junctions ◽  
High Current Density ◽  
Low Noise ◽  
High Current ◽  
Very High

NEEDLE CATHODES FOR HIGH-BRIGHTNESS BEAMS

2007 ◽  
Vol 22 (22) ◽  
pp. 3784-3793 ◽  
Author(s):  
C. H. BOULWARE ◽  
J. D. JARVIS ◽  
H. L. ANDREWS ◽  
C. A. BRAU
Keyword(s):  
Field Emission ◽  
Current Density ◽  
High Current Density ◽  
Thermionic Emission ◽  
High Current ◽  
High Brightness ◽  
Electron Sources ◽  
Schottky Effect ◽  
Surface Electric Field ◽  
Very High

At the tips of sharp needles, the surface electric field is enhanced by many orders of magnitude. This intensifies thermionic emission and photoemission of electrons through the Schottky effect, and reduces the effect of space charge. The increased current density improves the brightness of electron sources by orders of magnitude. In addition, at very high fields (>109 V/m ), field emission and photo-field emission produce very high current density. Arrays of needles can be used to achieve high total current.

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