Browsing by Author "Ehsan Ellahi Khawaja"

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    On the determination of refractive index and thickness of thin dielectric films from measurement of transmittance
    (World Scientific Publishing Company, 2012) Zaheer Hussain Shah; Imtiaz Ahmad; Q. A. Tahir; Ehsan Ellahi Khawaja
    Refractive index and thickness of a transparent ¯lm (ZnS) on a transparent substrate (BK-7 glass) have been determined from measurement of normal incidence transmittance, using di®erent methods. Some of the methods considered here are most widely used, as is apparent from the literature. The outcome of this study could help a researcher in selecting an appropriate method for such an application. The values of the refractive indices determined by di®erent methods were found to be close to each other (within 0.5%). However, large (up to 4.4%) di®erences existed in the values of the thickness determined by di®erent methods.