Reflection and refraction in active dielectric materials

M. C. DUPLAÁ; L. I. PÉREZ; C. L. MATTEO; M. T. GAREA

Lima

Congreso; 17th Reunion Iberoamericana de Optica, RIAO and 10th Encuentro de Optica, Laseres y Aplicaciones, OPTILAS; 2010

OSA, SPIE, ICO, JPCS, Quantel, CIO

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.