A terahertz molecular switch

Details A terahertz molecular switch A terahertz molecular switch

2003-04-03

arxiv.org/abs/cond-mat/0304090v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.178302

We present time-dependent results describing the current through a molecular device, modeled as a complex with two active centers connected to leads under bias. We show that, at a properly adjusted external voltage, a passing terahertz electromagnetic pulse may cause a transition between states of finite and negligible current, suggesting that the system might be useful as a nanoscopic switch in the terahertz range. A phase diagram defining the bias region in which the transition takes place within a short time is given. As described, the physical processes involved are of an entirely different nature than those in ordinary photodetectors.

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