Resonant optical absorption in crystalline molecular nanofilms

Full text: In this paper the alterations and changes in optical absorption properties of different nanofilm molecular crystals, caused by the presence of boundaries were investigated and analyzed. We observed ultrathin (nano) crystal film, which can be practically made by means of controlled reaching of massive dielectric samples. By combined analytical and numerical calculations, allowed exciton states were found, and their spatial distribution along the axis limit (by layers of film) and the surface localization was examined. The absorption and refraction indices of the observed ultrathin film was determined. The impact of (five) boundary parameters on resonant absorption phenomenon: discrete (by frequencies) and selective (by layers of film) was examined. The conditions for the emergence of single-resonant absorption lines were found. key words: ultrathin crystal films, optical absorption properties, absorption and refraction indices