title: Nanophotonic Image Sensors.
abstract: The increasing miniaturization and resolution of image sensors bring challenges to conventional optical elements such as spectral filters and polarizers, the properties of which are determined mainly by the materials used, including dye polymers. Recent developments in spectral filtering and optical manipulating techniques based on nanophotonics have opened up the possibility of an alternative method to control light spectrally and spatially. By integrating these technologies into image sensors, it will become possible to achieve high compactness, improved process compatibility, robust stability and tunable functionality. In this Review, recent representative achievements on nanophotonic image sensors are presented and analyzed including image sensors with nanophotonic color filters and polarizers, metamaterial-based THz image sensors, filter-free nanowire image sensors and nanostructured-based multispectral image sensors. This novel combination of cutting edge photonics research and well-developed commercial products may not only lead to an important application of nanophotonics but also offer great potential for next generation image sensors beyond Moore's Law expectations.
authors.affiliation: Key Lab of Nanodevices and Applications-CAS & Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou, 215123, P. R. China. qchen2012@sinano.ac.cn.
authors.forename: Qin
authors.initials: Q
authors.lastname: Chen
authors.affiliation: Key Lab of Nanodevices and Applications-CAS & Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou, 215123, P. R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Hu
authors.affiliation: Key Lab of Nanodevices and Applications-CAS & Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou, 215123, P. R. China.
authors.forename: Long
authors.initials: L
authors.lastname: Wen
authors.affiliation: Key Lab of Nanodevices and Applications-CAS & Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou, 215123, P. R. China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
authors.affiliation: School of Engineering, University of Glasgow, Glasgow, G12 8LT, UK.
authors.forename: David R S
authors.initials: DR
authors.lastname: Cumming
mesh_terms: D003116:Color; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D049329:Nanostructures / Q000737:chemistry*; D055095:Optics and Photonics / Q000295:instrumentation*; D012666:Semiconductors
keywords: image sensors; metamaterials; nanophotonics; plasmonics