1. Institute of Photonics and Nanotechnology, Vilnius University, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania
2. Laboratoire Ondes et Matiére d’Aquitaine, Bordeaux University, UMR CNRS 5798, 351 cours de la Libération, 33405 Talence, France
3. Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilėnų rd. 19, LT-50254 Kaunas, Lithuania
4. Institute of Chemical Physics, Vilnius University, Saulėtekio Ave. 3, LT-10257 Vilnius, Lithuania