Distributed Feedback Lasers by Thermal Nanoimprint of Perovskites Using Gelatin Gratings.
ACS Appl Mater Interfaces
; 15(6): 8436-8445, 2023 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-36720173
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.
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MEDLINE
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En
Ano de publicação:
2023
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Article