报告题目：Photonic resonators for structural color, photovoltaic,
and ultrasounic applications
Department of Electrical Engineering and Computer Science
报告时间：3月18日下午2:00L. Jay Guo
Department of Electrical Engineering and Computer Science
The University of Michigan, Ann Arbor, Michigan, USA
报告地点：教三326
报告摘要：
Light interacting with micro- and nano- structures can produce various interesting effects. I will give an example on how to explore such properties to produce structural colors—artificial structures that can produce colors without using colorant pigments; which may find potential applications in future display and e-book devices that offers more energy saving, and in making colored solar panels that can be applied to modern buildings. Light interacting with strongly absorbing nanomaterials, e.g. carbon nanotubes, could conceal all 3D attributes of an object. The principle can be exploited for other frequency bands for important engineering applications. The strong light absorption by the CNTs can be exploited for optoacoustic effect to generate strong ultrasound, which could lead to non-invasive and high-precision therapeutic applications. The ultrasound (acoustic pressure waves) can be also be detected by optical methods, leading to high resolution ultrasound imaging.
Time permits I will describe the roll-to-roll patterning based fabrication technologies developed at the University of Michigan and their applications. These processes are developed to address the need for large area, scalable manufacturing of photonic elements for display and solar cell applications, including wire grid polarizers and plasmonic color filters to increase the efficiency of LCD displays; and metallic wire grid transparent conductors for OLED and solar cell applications.
报告人简介：
Dr. L. Jay Guo has been on the faculty of the University of Michigan since 1999, and is currently a professor of Electrical Engineering and Computer Science, with joint appointment in Mechanical Engineering, Macomolecular Science and Engineering, and Applied Physics. He has 150 refereed journal publications, with total citation over 9000. Many published work from his lab have received numerous media reports. He also has more than 10 US patents and a number of pending applications. His group’s researches include polymer-based photonic devices and sensor applications, organic photovoltaics, plasmonic nanophotonics/metamaterials, nanoimprint-based and roll to roll nanomanufacturing technologies. For details see http://www.guogroup.org/
References:
- J. Y. Lee, K. T. Lee, S.Y. Seo, L. J. Guo, “Decorative power generating panels creating angle insensitive transmissive colors,” Sci. Rep. 4, 4192 (2014). DOI: 10.1038/srep04192. (reported by Science Daily, Popular Science, PhysOrg, Reddit, Computer Magazine, Gizmodo, etc)
- H. W. Baac, T. -H. Lee, L. J. Guo, “Micro-ultrasonic cleaving of cell clusters by laser-generated focused ultrasound and its mechanisms,” Biomed. Opt. Exp. 8, 1442-1450 (2013); doi: 10.1364/BOE.4.001442 (reported by Nature Photonics: doi:10.1038/nphoton.2013.259)
- Y.-K. Wu, A. E. Hollowell, C. Zhang, L. J. Guo, “Angle-Insensitive Structural Colours based on Metallic Nanocavities and Coloured Pixels beyond the Diffraction Limit,” Scientific Reports, 3, 1194; DOI:10.1038/srep01194 (2013) (reported by Engadget, EE Times, New Scientist, Optics & Photon. News, etc)
- H. W. Baac, J. G. Ok, A. Maxwell, K.-T. Lee, Y.–C. Chen, A. J. Hart, Z. Xu, E. Yoon, L. J. Guo, “Carbon-Nanotube Optoacoustic Lens for Focused Ultrasound Generation and High-Precision Targeted Therapy,” Scientific Reports, 2, 989 (8 pages), 2012, DOI: 10.1038/srep00989. (reported by Science Daily, R&D Magazine, Science Newsline, Business Standard, etc.
- H.-F. Shi, J. G. Ok, H. W. Baac, L. J. Guo, “Low density carbon nanotube forest as an index-matched and near perfect absorption coating,” Appl. Phys. Lett. 99, 211103, 2011. (reported by Science, Technology Review, BBC News, Popular Science, NY Times Syndicates, R&D Magazine, etc)
- H. J. Park, T. Xu, J. Y. Lee, A. Ledbetter, and L. J. Guo, “Photonic Color Filters Integrated with Organic Solar Cells for Energy Harvesting,” ACS Nano, 9, 7055–7060, 2011. (reported by Technology Review, Solar Novus Today, Plastic Electronics, R&D Magazine, Laser Focused World, etc).
- T. Xu, Y.-K. Wu, X.-G. Luo, and L. J. Guo, “Plasmonic nano-resonators for color filtering and spectral imaging,” Nat. Comm. 2010, doi: 10.1038/ncomms1058. (Reported by Technology Review, R&D Magazine, Photonics Spectra, Popular Science, etc).
- S. H. Ahn, and L. J. Guo, “High Speed Roll-to-Roll Nanoimprint Lithography on Flexible Plastic Substrate,” Adv. Mater, 20, 2044–2049, 2008. (Reported by Photonics Spectra and Materials Today); and “Large-area Roll-to-Roll and Roll-to-Plate Nanoimprint Lithography and analytical models for predicting residual layer thickness,” ACS Nano 3, 2304–2310, 2009. (reported by Technology Review and ACS Podcast)
- H. J. Park, M. G. Kang, S.-H. Ahn and L. J. Guo, “Facile route to polymer solar cells with optimum morphology applicable to roll-to-roll process,” Adv Mater, 22, E247-E253, 2010 (Reported by technology Review)
- M.-G. Kang, and L. J. Guo, “Nanoimprinted Semi-Transparent Metal Electrode and its Application in OLED,” Adv. Mater. 19, 1391-1396, 2007. (Reported by Technol. Review, and Laser Focus World)
欢迎感兴趣的师生参与。
