Allegro, Isabel, Bonal, Víctor, Mamleyev, Emil R., Villalvilla, José M., Quintana, José A., Jin, Qihao, Díaz-García, María A., Lemmer, Uli
Distributed Feedback Lasers by Thermal Nanoimprint of Perovskites Using Gelatin Gratings
ACS Applied Materials & Interfaces. 2023, 15(6): 8436-8445. https://doi.org/10.1021/acsami.2c22920
URI: http://hdl.handle.net/10045/131782
DOI: 10.1021/acsami.2c22920
ISSN: 1944-8244 (Print)
Abstract: 
To date, thermal nanoimprint lithography (NIL) for patterning hybrid perovskites has always involved an intricate etching step of a hard stamp material or its master. Here, we demonstrate for the first time the successful nanopatterning of a perovskite film by NIL with a low-cost polymeric stamp. The stamp consists of a dichromated gelatin grating structured by holographic lithography. The one-dimensional grating is imprinted into a perovskite film at 95 °C and 90 MPa for 10 min, resulting in a high quality second-order distributed feedback (DFB) laser. The laser exhibits an excellent performance with a threshold of 81 μJ/cm2, a line width of 0.32 nm, and a pronounced linear polarization. This novel approach enables cost-effective fabrication of high-quality DFB lasers compatible with different perovskite compositions and photonic nanostructures for a wide range of applications.
Keywords:Nanoimprint lithography, Distributed feedback lasers, Perovskite films, Polymer gratings
American Chemical Society
info:eu-repo/semantics/article