Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Noncausal time response in frustrated total internal reflection?

Carey, J.J. and Zawadzka, J. and Jaroszynski, D.A. and Wynne, K. (2000) Noncausal time response in frustrated total internal reflection? Physical Review Letters, 84 (7). pp. 1431-1434. ISSN 0031-9007

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Tunneling of photons in frustrated total internal reflection has been studied in the time domain with single-cycle femtosecond pulses. It is seen that both the phase and energy of the pulse travel faster than the speed of light in vacuum. Theoretical analysis of the experiments shows that the time-response function for electromagnetic waves propagating in the air gap is noncausal. However, it is found that superluminal signal propagation is not possible in this case because of the inevitable diffractive spreading of the signal beam.