Story highlights
- Researchers develop graphene oxide optics with application in imaging and photonics
- Graphene oxide lens has 3D subwavelength capability that is 30 times more efficient
- Lens offers simple and low-cost manufacturing.
(2D Materials Magazine)-Researchers based at Swinburne University of Technology, in collaboration with with Monash University, have announced they have developed an ultrathin, flat, ultra-lightweight graphene oxide optical lens that offers unprecedented flexibility.
Graphene oxide optical lens
The researchers state that the lens is a candidate for applications in on-chip nanophotonics and improves the conversion process of solar cells. Potential applications include:
- non-invasive 3D biomedical imaging
- photonic chips
- aerospace photonics
- micromachines
- laser tweezing – the process of using lasers to trap tiny particles.
According to the researchers, recent breakthroughs in nanophotonics have led to the development of a number of ultrathin flat lens concepts, however their real-life application is limited due to their complex design, narrow operational bandwidth and time consuming manufacturing processes.
“Our lens concept has a 3D subwavelength capability that is 30 times more efficient, able to tightly focus broadband light from the visible to the near infrared, and offers a simple and low-cost manufacturing method,” research leader in nanophotonics at Swinburne’s Centre for Micro-Photonics (CMP), Associate Professor Baohua Jia, said.
The researchers produced a film that is 300 times thinner than a sheet of paper by converting graphene oxide film to reduced graphene oxide through a photoreduction process.
Lead authors PhD candidate Xiaorui Zheng and Associate Professor Baohua Jia.
“These flexible graphene oxide lenses are mechanically robust and maintain excellent focusing properties under high stress,” lead author of the research, PhD candidate Xiaorui Zheng said. “They have the potential to revolutionise the next-generation integrated optical systems by making miniaturised and fully flexible photonics devices.”
CMP Director, Professor Min Gu, said: “The newly demonstrated laser nano-patterning method in graphene oxides holds the key to fast processing and programming of high capacity information for big data sectors.”
Professor Dan Li, Co-director of the Monash Centre for Atomically Thin Material, which provided the graphene oxide film for this research said this work opens up a new high-tech application for graphene oxide and demonstrates how nanotechnology can add significant value to natural graphite.
The research is published in Nature Communications and has been funded by the Australian Research Council under its Discovery Early Career Researcher Award, Discovery Project and Laureate Fellowship scheme.
