1. From nature: Optics, nanotechnology, and nano-optics 2. Nano-optics: Challenges, trends, and future 3. Nano-optics for healthcare applications 4. Laser, nanoparticles, and optics 5. Introduction to quantum plasmonic sensing 6. Nanobiophotonics and fluorescence nanoscopy in 2020 7. Nanotechnology-based fiber-optic chemical and biosensors 8. Light transport in three-dimensional photonic crystals 9. Application of two-dimensional materials in fiber laser systems 10. Carbon nanotube-based sensors and their application 11. Optical fiber coated with zinc oxide nanorods toward light sidecoupling for sensing application 12. Synthesis, characterization, and applications of opals 13. Theoretical methods, simulation and modeling in nano-optics 14. Photonic crystals-based light-trapping approach in solar cells