Porous glass (PG) has demonstrated its unique charm as a "tolerant" host material for immobilization of a variety of dopants (Er, Yb, Bi, etc.) with high concentration due to its unique properties of high surface area and physical separation of nanopores that can avoid the clustering of ltnninescence ions. However, the prospect of PG as a substrate for active photonic elements, especially active waveguides, has never been examined, which hinder the lab-on-a-chip application. More recently, we exploited femtosecond laser-induced densification of PG as a method for space-selective control of matrix density. This time, we consider the fabrication of active waveguides in pre-impregnated PG with bismuth and show effect of locally manipulating the state of bismuth.

Чжун Л., Сергеев М.М., Останин А.А., Заколдаев Р.А. (науч. рук. Вейко В.П.) Femtosecond laser direct writing active waveguide in bismuth-impregnated porous glass // Сборник тезисов докладов конгресса молодых ученых. Электронное издание. – СПб: Университет ИТМО, [2020]. URL: https://kmu.itmo.ru/digests/article/2914