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UW researchers unleash graphene ‘tiger’ for more efficient optoelectronics
UW researchers graphene tiger efficient optoelectronics
2016/5/19
In the quest to harvest light for electronics, the focal point is the moment when photons — light particles — encounter electrons, those negatively-charged subatomic particles that form the basis of o...
We demonstrate that 100% light absorption can take place in a single patterned sheet of doped graphene. General analysis shows that a planar array of small lossy particles exhibits full absorption und...
Raman Spectroscopy Study of Annealing-Induced Effects on Graphene Prepared by Micromechanical Exfoliation
Graphene Raman spectroscopy Thermal annealing
2010/11/22
Since its isolation from graphite,1 graphene has drawn a lot of experimental and theoretical research. These efforts have been mostly in pursuit of various applications such as electronics,2 sensors,3...
Effect of oxygen plasma etching on graphene studied with Raman spectroscopy and electronic transport
Effect of oxygen plasma Raman spectroscopy electronic transport
2010/11/17
We report a study of graphene and graphene field effect devices after exposure to a series of short pulses of oxygen plasma. We present data from Raman spectroscopy, back-gated field-effect and magnet...
Amplified Stimulated Terahertz Emission at Room temperature from Optically Pumped Graphene
Terahertz Emission Room temperature Optically Pumped Graphene
2010/11/17
Room temperature Terahertz stimulated emission and population inversion in optically pumped graphene is reported. We experimentally observe fast relaxation and relatively slow recombination dynamics ...
The parity of specular Andreev reflection under mirror operation in zigzag graphene ribbon
parity of specular Andreev reflection mirror operation
2010/11/25
It is known that the parity of reflection amplitude can either be even or odd under the mirror
operation. Up to now, all the parities of reflection amplitude in the one-mode energy region are even un...
We demonstrate a wideband-tunable Q-switched fiber laser exploiting a graphene saturable absorber.We get2μs pulses, tunable between 1522 and 1555nm with up to40nJ energy. This is a simple and low-co...
Raman and optical characterization of multilayer turbostratic graphene grown via chemical vapor deposition
Raman optical characterization chemical vapor deposition
2010/11/19
We synthesize large-area graphene via atmospheric-pressure (AP) chemical vapor deposition
(CVD) on copper, and transfer to SiO2 wafers. In contrast to low-pressure (LP) CVD on copper,
optical contra...
Graphene shines a light on surface-enhanced spectroscopy（图）
Graphene a light surface-enhanced spectroscopy
2010/10/12
Surface-enhanced Raman scattering (SERS) is a powerful way to identify molecules at very low concentrations – a technique that has proven very useful in forensics, medical diagnostics and identifying ...