Reflection and refraction in active dielectric materials

MARÍA CELESTE DUPLAÁ; LILIANA I. PEREZ; CLAUDIA L. MATTEO; MARÍA T. GAREA

Journal of Physics: Conference Series

IOP Publishing

Lugar: Bristol BS1 6BE; Año: 2011 vol. 274 p. 1 - 9

1742-6588

In this work we study and analyze in detail the characteristics of the modulus and phase of the reflection and transmission coefficients in interfaces between isotropic media, when the incident electromagnetic wave is propagating from a transparent medium towards an active one. We also demonstrate analytically that Amplified Reflection is impossible if semi-infinite media are involved. Due to these coefficients, the oscillatory or monotonic character of the phase difference between p and s modes is shown as a function of the angle of incidence for different active media. A qualitative and quantitative comparison between our own results and those obtained by many authors on absorbing media is made. We consider that this work can clarify some aspects that can contribute in the use of ellipsometric techniques for the determination of optical properties of active media.