High photoinduced birefringence in thermally treated layers of the azopolymer PAZO with significantly changed absorbance spectrumGeorgi Mateev, Deyan Dimov, Dimana Nazarova, Elena Stoykova, Keehoon Hong and Lian NedelchevEPJ Web Conf., 305 (2024) 00011DOI: https://doi.org/10.1051/epjconf/202430500011