This group spearheads the development of advanced nanofabrication and multi-dimensional printing technologies to address the frontier challenges for light-matter interactions. Our research interests have spanned the fields of flat optics, tunable metasurfaces, nonlinear optics, 3D photonic crystals, etc. The team has built up capabilities of we have established capabilities for making 2D and 3D nanostructures via advanced nanoprinting technologies, including two-photon polymerization lithography (TPL) and nanoimprint lithography (NIL). Currently, this group is developing large area fabrication of flat optics via NIL under A*STAR MTC Programmatic Fund. In addition, we are developing a platform technology by integrating emerging materials such as low dimensional materials, phase change materials, stimuli-responsive materials into optical subwavelength structures to realize dynamically tunable 2D and 3D photonic crystals towards perfect control of light.
CAPABILITIES
This group has established the capabilities of large-area nanoimprint lithography for flat optics, 3D nanoprinting for photonic crystal engineering, tunable metasurfaces, and layered perovskite synthesis. Our team consists of scientists and engineers with rich experiences in these areas.
- Large area and single-step nanoimprint lithography of metalenses using high refractive index nanocomposite (TD);
- Photonic bandgap engineering of 3D photonic crystals via TPL (ACS Nano 16, 8244, 2022)
- High harmonic generation via dielectric metasurfaces and characterization (Advanced Functional Materials 31, 2104627, 2021)
- Low loss dielectric and tunable metasurfaces of emerging optical materials (perovskite, wide bandgap semiconductors, etc.) (Laser Photonics Reviews. 13, 1800289, 2019; Advanced Materials. 34, 2109157, 2022; Nanophotonics, 11, 3961-3968, 2022)
- Complex wavefront engineering and diffractive flat optics (Nature Communications. 10, 4789, 2019; Light: Science & Applications. 7, 17156, 2018; Advanced Materials. 30, 1704556, 2018; Advanced Materials. 28, 2533, 2016; Laser & Photonics Reviews. 10, 500, 2016; Nature Communications. 6, 7059, 2015;
- Nanoplasmonics (Nano Letters, 12, 1549, 2012; Advanced Functional Materials. 22, 3777, 2012; ACS Nano 4, 3139, 2010)
- A full suite of advanced nanofabrication techniques, including electron beam lithography, focused ion beam lithography, dry etching, PVD, CVD, atomic layer deposition, and relevant characterisation techniques
HIGHLIGHTS & ACHIEVEMENTS
The team delivers high impactful research and technology development in advanced nano-optics and nanoprinting technologies through the collaboration with international and local universities. Our recent achievements are highlighted below.
- An miniaturized merlion consisted of sub-micron 3D photonic crystals to demonstrate vivid structural colors in collaboration with Prof. Joel Yang is published by ACS Nano. 16, 8244, 2022;
- An invited review article on tunable metasurfaces in collaboration with Prof. Renshaw Wang (NTU SPMS) and Prof. Qijie Wang (NTU EEE/SPMS) is published by ACS Nano. 2022, 16, 9, 13339–13369;
- A light-emitting ultrasmooth perovskite metasurfaces via nanoimprint lithography in collaboration with Prof Cesare Soci (NTU/SPMS) is published by Advanced Materials. 34, 2109157, 2022;
- A hybrid metasurfaces of high Q-factor Fano resonance to realize high efficiency THG in collaboration with Prof Renshaw Wang (NTU SPMS) and Prof Qijie Wang (NTU EEE/SPMS) is published by Advanced Functional Materials. 31, 2104627, 2021.
- A review article of the lithographic methods for large scale and mass fabrication of biochips and biosensors in collaboration with Prof Lushin Wong (University of Manchester) and Dr. Xiaodi Su (IMRE) is published by ACS Sensors. 6, 2002, 2021;
If you are interested to join our group, please send your CV to the group leader, Dr. Liu Hong.