A simple method for the determination of the optical constants n, k and the thickness of a weakly absorbing thin film

Abstract

La caviti I1 peut s'ouvrir, contrairement a la cavite I, ce qui permet de la retirer d'un ensemble experimental sans avoir a la demonter. Par contre son reglage est beaucoup plus delicat et la luminosite maximum plus difficile a obtenir. Dans nos experiences nous avons prefere, pour sa facilite d'utilisation, la cavite I a la cavitk I1 pour les travaux de routine. 4 Conclusion Les cavites que nous avons conques ont des performances, tant du point de vue luminosite que domaine de pression, superieures aux appareils existants. Leur grande efficacite d'excitation permet de les faires travailler dans des conditions experimentales difficiles. La stabilite de leur decharge en fait des sources trBs interessantes de radicaux libres pour des etudes cinktiques. La cavitk I est particulikrement interessante en ce sens. Remerciements Ce travail a et6 effectue dans le laboratoire de M le Professeur P Goudmand. Nous tenons a le remercier pour tous les conseils qu'il a bien voulu nous donner et pour l'attention bienveillante qu'il a porte a nos efforts.

Wet Chemical Etching of Pb(ZrTi)O 3 Ferroelectric Thin Films for Optical Waveguide Application

“…The results obtained in our studies are also in relatively good accordance with the data from other PZT thin films elaborated by chemical solution deposition processes [15,16]. Determination of the refractive index and the thickness of our films by the envelop method [17] confirmed the results, however was less precise than the M-lines measurements.…”

Fabrication and properties of zinc oxide thin film prepared by sol-gel dip coating method

“…Hence, with an increase in withdrawal speed, the thickness of thin films increases. By interpreting the transmission curve, the thickness of the films was calculated using envelope method [15]. The optical absorption coefficient ∝ was calculated from equation:…”

Characterization of LaF3 coatings prepared at different temperatures and rates

“…A Perkin-Elmer Lambda 900 UV/VIS/NIR spectrophotometer was employed to measure transmittance spectra of the samples. The optical constants were obtained by photometric method [11,12] from the measured transmittance spectral curves. The error limit of the refractive index obtained is about AE0.1%.…”