Determination of the optical properties of rohdamine 6g thin-films

Abstract EN

In this work, thin films were produced from Rhoda mine 6G deposited on glass substrate that has a thickness of 1mm and refractive index equal 1.3 in a vacuum chamber.

The thickness of the thin film was measured by interference phenomena using He-Ne laser with a power of 1 mW during the deposition process.

Incident and transmitted intensity of different laser wavelengths, extended from mid visible (532 nm) to near infrared region (1064 nm), from the prepared films were measured.

These intensities were used to calculate the transmission percentage and the reflectance of the thin film as a function of wavelengths.

Furthermore, index and the absorption coefficient for each thin film were deduced.

All these measured and calculated values were obtained at normal incidence of laser on the thin film.

The results gave a good indication that this material can be used as filters at some wavelengths.

Some variation in the results were noticed where this may be attributed to the inhomogeneous deposition of some of the fabricated films.