Fundamental Optical Properties of Materials I 1

S. O. Kasap, W. C. Tan, Jai Singh, Asim K. Ray

    Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


    Optical properties of a material change or affect the characteristics of light passing through it by modifying its propagation vector or intensity. Two of the most important optical parameters are the refractive index and the extinction coefficient, which are generically called optical constants, although some authors include other optical coefficients within this terminology. This chapter presents the refractive index and extinction coefficient in detail, along with some common dispersion relations. It presents various common dispersion relationships such as the Cauchy, Sellmeier, Wemple–DiDomenico dispersion relations, and explains the determination of the optical constants of a material in thin film form using the popular Swanepoel technique. The latter technique is based on the interference of waves in the thin film, and uses the maxima and minima in the transmittance spectrum to extract the dispersion relation for refractive index and extinction coefficient. The chapter also considers the transmittance of light through a thick semitransparent plate.
    Original languageEnglish
    Title of host publicationOptical Properties of Materials and Their Applications
    EditorsJai Singh
    Place of PublicationNew Jersey
    PublisherJohn Wiley & Sons
    Number of pages36
    ISBN (Electronic)9781119506003
    ISBN (Print)9781119506317
    Publication statusPublished - 2020


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