报告人：Prof. Xiangping Li
Institute of Photonics Technology, Jinan University, Guangzhou, China
Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Victoria 3122, Australia,
题目：Green photonics for the next generation information technology
The exponentially increased amount of annual data consumption of human beings has compelled the ongoing technical innovations for information technologies with ultrahigh storage capacities, ultrafast processing throughput, and ultrahigh energy efficiency. The emerging nanophotonics, the interaction of nano-probe beams with nanocomposite materials, has provided a green technology platform to fulfill these requirements. Despite the exceptional features of photonic devices, the diffraction nature of the writing beam restricts the development of the volumetric storage with a theoretical capacity up to a few Terabytes per disc . In addition, the data stored in a conventional two-value bit has a low level of information security. The information reconstruction process such as displays is limited to two-dimensional owing to the lack of techniques capable of three-dimensional wavefront reconstruction.
In this paper, we report on the development of nanophotonic techniques to address the bottleneck issues confronting the current optical data storage. Based on the sharp polarization sensitivity of gold nanoparticles, we have developed polarization multiplexed multi-dimensional optical storage with an enhanced security by one order of magnitude . To break the diffraction limit and record superresolved bits in the medium, we have demonstrated the photoinduction-inhibited nanolithography (SPIN) technique for superresolution optical data storage. The smallest feature size of 33 nm for bits, has been demonstrated, which leads to an equivalent storage capacity approaching 1 Petabytes per disc. In addition, we can effectively parallelize the nanoscopy through accurate phase manipulation facilitated by spatial light modulators with orders of magnitude improved throughput . The generated multifocal arrays based on the principle of SPIN method allows three-dimensional parallel recording of bits at the nanometer scale. To address the bottleneck issue in ultra-fast 3D information reconstruction, we demonstrated an entirely new principle of light-control-light display in graphene based nanocomposites . True-color and wide-angle 3D images can be vividly viewed.
1. X. Li, Y. Cao and M. Gu, “Superresolution-focal-volume induced 3.0 Tbytes/disk capacity by focusing a radially polarized beam”, Opt. Lett. 32, 2510 (2011)
2. X. Li, T. H. Lan, C. H. Tien and M. Gu, “Three-dimensional orientation-unlimited polarization encryption by a single optically configured vectorial beam” Nat. Commun. 3, 998 (2012)
3. X. Li, Y. Cao, N. Tian, L. Fu, and M. Gu, Multifocal optical nanoscopy toward ultra-high 30 TB capacity and Gigabits/second data rate big data recording, Optica 2, 567-570, (2015)
4. X. Li, H. Ren, X. Chen, J. Liu, Q. Li, C. Li, G. Xue, J. Jia, L. Cao, A. Sahu, B. Hu, Y. Wang, G. Jin, and M. Gu, “Athermally photoreduced graphene oxides for three-dimensional holographic images”, Nat. Commun. 6, 6984 (2015)
Dr. Xiangping Li graduated from the Centre for Micro-Photonics, Swinburne University of Technology in 2009. His research interests over the nanophotonics for ultrahigh capacity optical storage, multi-dimensional optical recording, three-dimensional display and graphene photonics. He has invented the world’s first three-dimensional polarization-encrypted optical storage and expanded the principle of stimulated emission depletion method into the superresolution optical recording, which has set up a new world’s record in storage capacity up to 1 Petabyte per dvd sized disc. Dr. Li is also a recipient of numerous competitive awards including ARC APD fellow in 2011, Victoria Fellowship in 2013, ARC DECRA fellow in 2014 and China’s Young 1000 talent in 2015. In 2015, he joined the Institute of Photonics Technology in Jinan University and set up a new team working on the green photonics.