Transient stimulated emission from multi-split-gated graphene structure

Stimulated Near-Infrared Light Emission in Graphene

Graphene—a carbon sheet only one atom thick—provides physicists with a playground to explore exotic quantum phenomena, and engineers with a material with which they may be able to miniaturize electronic devices and catch up with Moore’s law [1, 2]. New results reported in Physical Review Letters by Tianqi Li and colleagues at Ames Laboratory and Iowa State University suggest that graphene has a...

Plasmon Amplification through Stimulated Emission at Terahertz Frequencies in Graphene

We show that plasmons in two-dimensional graphene can have net gain at terahertz frequencies. The coupling of the plasmons to interband electron-hole transitions in population inverted graphene layers can lead to plasmon amplification through the process of stimulated emission. We show that the net gain values can exceed 10 cm−1 in the 1-10 terahertz frequency range, for electron-hole densities...

Exciton-exciton annihilation and biexciton stimulated emission in graphene nanoribbons.

Graphene nanoribbons display extraordinary optical properties due to one-dimensional quantum-confinement, such as width-dependent bandgap and strong electron-hole interactions, responsible for the formation of excitons with extremely high binding energies. Here we use femtosecond transient absorption spectroscopy to explore the ultrafast optical properties of ultranarrow, structurally well-defi...

Stimulated infrared emission from rocks

Stimulated infrared emission from rocks: assessing a stress indicator F. T. Freund, A. Takeuchi, B. W. S. Lau, A. Al-Manaseer, C. C. Fu, N. A. Bryant, and D. Ouzounov Ecosystems Science and Technology Branch, Code SGE, NASA Ames Research Center, Moffett Field, 94035-1000, CA, USA Department of Physics, San Jose State University, San Jose, 95192-0106 CA, USA SETI Institute, Mountain View 94043, ...

Field Emission from Graphene Nanosheets