Iontronically Tunable Broadband Graded Index Films
Year: 2024
Authors: Franceschini P., Tognazzi A., Demartis V.M., Carletti L., Menshikov E., Alessandri I., Cino A.C., Torricelli F., De Angelis C., Vincenti M.A.
Autors Affiliation: Univ Brescia, Via Branze 38, I-25123 Brescia, Italy; Ist Nazl Ott Consiglio Nazl Ric INO CNR, Via Branze 45, I-25123 Brescia, Italy; Univ Palermo, Viale Sci, I-90128 Palermo, Italy.
Abstract: Tunable optical devices are of paramount importance in modern optical engineering, offering the flexibility to dynamically adjust key optical parameters, thus enhancing functionality and adaptability. In this study, a fresh approach is presented to achieve on-demand, spatially tunable optical properties using organic mixed ion-electron conductors, which can be produced using large-scale, cost-effective technologies. It is demonstrated how, by exploiting, the spatial modulation of the bulk electronic conductance of PEDOT:PSS through an organic electrochemical transistor configuration, we can create a spatially tunable broadband gradient index profile with multiple degrees of freedom. These findings introduce a new class of tunable graded index media, which hold potential for a wide range of applications that span from optical interconnections to multi-focal optical devices.
Journal/Review: ADVANCED OPTICAL MATERIALS
More Information: This work was partially supported by the European Union under the Italian National Recovery and Resilience Plan (NRRP) of Next Generation EU, of partnership on Telecommunications of the Future (PE00000001 – program RESTART), S2 SUPER – Programmable Networks, Cascade project PRISM – CUP: E13C22001870001 and by the NATO Science for Peace and Security program (Grant no. 5984).KeyWords: graded index optics; organic polymers; tunable devicesDOI: 10.1002/adom.202402410