Lawrence Berkeley National Laboratory
Nanoimprinted High-Refractive Index Active Photonic Nanostructures Based on Quantum Dots for Visible Light
- Author(s): Pina-Hernandez, C
- Koshelev, A
- Dhuey, S
- Sassolini, S
- Sainato, M
- Cabrini, S
- Munechika, K
- et al.
Published Web Locationhttps://doi.org/10.1038/s41598-017-17732-0
© 2017 The Author(s). A novel method to realizing printed active photonic devices was developed using nanoimprint lithography (NIL), combining a printable high-refractive index material and colloidal CdSe/CdS quantum dots (QDs) for applications in the visible region. Active media QDs were applied in two different ways: embedded inside a printable high-refractive index matrix to form an active printable hybrid nanocomposite, and used as a uniform coating on top of printed photonic devices. As a proof-of-demonstration for printed active photonic devices, two-dimensional (2-D) photonic crystals as well as 1D and 2D photonic nanocavities were successfully fabricated following a simple reverse-nanoimprint process. We observed enhanced photoluminescence from the 2D photonic crystal and the 1D nanocavities. Outstandingly, the process presented in this study is fully compatible with large-scale manufacturing where the patterning areas are only limited by the size of the corresponding mold. This work shows that the integration of active media and functional materials is a promising approach to the realization of integrated photonics for visible light using high throughput technologies. We believe that this work represents a powerful and cost-effective route for the development of numerous nanophotonic structures and devices that will lead to the emergence of new applications.