Abstract:
Metalenses consist of a large number of optical nanoantennas which are capable of focusing the incoming wavefront of light [1-6]. We use a 60 × 60 dielectric achromatic metalens array to capture multidimensional optical information. The highest efficiency can be up to 74% at a wavelength of 420 nm, while the average efficiency is approximately 39% over the whole working bandwidth. The light field images and the depth information of objects can be determined by reorganizing the patches of sub-images and calculating the disparity of neighbor sub-images, respectively. The depth information can be used to optimize the patch sizes to render the all-in-focus images without artifacts. The smallest feature of objects that could be resolved in our system is 1.95 μm under the incoherent white light. Our work provides several advantages associated with light field imaging: elimination of chromatic aberration, polarization selectivity and compatibility of the semiconductor process. Considering the flexibility, the achromatic multiplexed metalens array with integrated functionalities may be promising for multifocusing microscopy, high-dimension quantum technology, hyperspectral microscopy, micro robotic vision, nomen automobile sensing, virtual and augmented reality (VR and AR), drones, and miniature personal security systems [7].
References
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Brief Bio:
Professor Din Ping Tsai is a Distinguished Research Fellow of Research Center for Applied Sciences, Academia Sinica and Distinguished Professor of Department of Physics, National Taiwan University. He is a Fellow of AAAS, APS, IEEE, JSAP, OSA, SPIE, Physics Society of Taiwan and Electro Magnetics Academy. He is also the Member of International Academy of Engineering (IAE), and Academician of Asia-Pacific Academy of Materials (APAM). He is the President of Taiwan Information Storage Association (TISA) (2015-). He was the president of Taiwan Photonics Society (TPS) (2014-2016), and served as committee member for IEEE Joseph F. Keithley Award in Instrumentation & Measurement (2013-2016), and the award committee for OSA and IS&T Edwin H. Land Medal (2014-2016). He was the Director of the Board of SPIE from 2012 to 2014, and Chair (2009-2013) of IEEE Instrument and Measurement Society, Taipei Chapter, Member of SPIE Fellow Committee for three years (2010-2013), and Member of OSA Fellows and Honorary Members Committee for 2008 & 2009, respectively. He was the chair and vice chair of the International Society for Optical Engineering (SPIE) Taiwan chapter for the 2004 & 2005 and 1996 & 1997, respectively. He was also a member of technical committee of IEEE/LEOS nanophotonics. He currently serves as an Editor of “Progress in Quantum Electronics (PQE),” Associate Editor of “Journal of Lightwave Technology (JLT),” and member of editorial boards of ten Optics, Photonics and Physics related SCI journals. He served as the Director General of the Instrument Technology Research Center (NARL) located in Hsinchu Science Park, Taiwan from 2008 to 2012, and the Director of Research Center for Applied Sciences, Academia Sinica, Taiwan from 2012 to 2019. He is author and co-author of 302 SCI journal papers (more than 9911 cited times, H-index 50), 65 book chapters and conference papers, and 38 technical reports and articles. He had 44 patents in USA, Japan, Canada, Germany and Taiwan. His current research interests are Near-field Optics, Nano-photonics, Plasmonics, Meta-Optics, Bio-photonics, Green Photonics, Quantum Photonics and their applications.