X-ray waveguide phenomenon in copper phthalocyanine thin film

A white X-ray beam was irradiated on a copper phthalocyanine (CuPc) thin film under grazing incidence condition, and X-rays propagated in the film due to the waveguide phenomenon were observed by an energy-dispersive detector. Energy profiles of guided X-rays showed four specific resonant modes. By comparing them with the calculated ones, a three-layer model of CuPc film was proposed.