Nonlinear optical effects have enabled numerous applications such as laser frequency conversion, ultrafast electro-optical, and all-optical modulation. Both gaseous and bulk media have conventionally been used for free-space nonlinear optical applications, yet they often require complex phase-matching techniques for efficient operation and may have limited operation bandwidth due to the material absorption. In the last decade, meta-optics made of subwavelength antennas or films have emerged as novel nonlinear optical media that may potentially overcome certain limitations of bulk crystals. Due to resonant enhancements of the pump laser field as well as the use of materials with extreme nonlinearity such as epsilon-near-zero materials, meta-optics can achieve strong nonlinear responses with a subwavelength thickness. Here, we review several nonlinear optical applications, such as electric-field-induced second-harmonic generation, entangled photon pair generation, terahertz generation, all-optical modulation, and high-harmonic generation that we envision meta-optics may have distinct advantages over their bulk counterparts. We outline the challenges still faced by nonlinear meta-optics and point out some potential directions.
Optical waveguide of organic micro/nanocrystals is one of crucial elements in miniaturized integrated photonics. One-dimensional (1D) organic crystals with various optical features have attracted increasing interests towards promising photonic devices, such as multichannel signal converter, organic field-effect optical waveguide, sensitive detector, and optical logic gate. Therefore, a summary about the 1D organic micro/nanocrystals based optical waveguide is important for the rational design and fabrication of novel optical devices towards optoelectronics applications. Herein, recent advances of optical waveguide based on 1D organic micro/nanocrystals with solid, flexible, hollow, uniformly doped, core-shell, multiblock and branched structures are summarized from the aspects of the waveguide properties and applications in photonic devices. Furthermore, we presented our personal view about the expectation of future development in 1D organic optical waveguide for the photonic applications.
Editor-in-Chief Min Gu "It is no doubt that photonics has become a key enabling technology platform for our sustainable life. It is at this exciting time that we welcome the arrival of the inaugural issue of the journal, PhotoniX, to our photonics community. We aim that the new journal not only truly showcases the enabling power of photonics, but also strives to develop this power into cultivating industries as well as improving the competitiveness, the scope and depth of science and technology in general..."
Editor-in-Chief Min Qiu "This open-access journal focuses on photonic technology with cutting-edge, multidisciplinary and derivative characteristics, aiming to become a platform to promote the international frontier "Enabling Technology". It comes at a crucial moment when both academia and industry urgently need a platform to explore the true enabling power of photonics..."
Editor-in-Chief: Min Gu
He is Executive Chancellor and Distinguished Professor of University of Shanghai for Science and Technology. He was Distinguished Professor and Associate Deputy Vice-Chancellor at RMIT University and a Laureate Fellow of the Australian Research Council. He is an author of 4 standard reference books and has over 500 publications in nano/biophotonics. He is an elected fellow of the Australian Academy of Science and the Australian Academy of Technological Sciences and Engineering as well as foreign fellow of the Chinese Academy of Engineering. He is also an elected fellow of the AIP, the OSA, the SPIE, the InstP, and the IEEE. He was President of the International Society of Optics within Life Sciences, Vice President of the Board of the International Commission for Optics (ICO) (Chair of the ICO Prize Committee) and a Director of the Board of the Optical Society of America (Chair of the International Council). He was awarded the Einstein Professorship, the W. H. (Beattie) Steel Medal, the Ian Wark Medal, the Boas Medal and the Victoria Prize for Science and Innovation. He is a winner of the 2019 Dennis Gabor Award of SPIE.
Editor-in-Chief: Min Qiu
He received the Ph.D. degree from Zhejiang University in 1999. He received his second Ph.D. degree and became an assistant professor at the Royal Institute of Technology (KTH), Stockholm, Sweden, in 2001. He became a full professor (Professor of Photonics) at KTH in 2009. Since 2010, he became a distinguished professor at Zhejiang University. He was the Director of State Key Laboratory of Modern Optical Instrumentation, Zhejiang University. He joined Westlake University as a Chair Professor of Photonics in April 2018. His research interests include nanofabrication technology, nanophotonics, and green photonics. He was elected a fellow of the Institute of Electrical and Electronics Engineers (IEEE) in 2015, a fellow of the Optical Society of America (OSA) and a fellow of the International Society for Optics and Photonics (SPIE) in 2013. He is leading a project on solar thermal energy utilization through the National Key Research and Development Program of China (No. 2017YFA0205700). He is currently an editor of Optics Communications (Elsevier), a topical editor of Light: Science and Applications (Springer Nature), and an associate editor of Science Bulletin (Science China Press).