This book is primarily intended to be a text book for Bachelor/Master Degree students of Science, Engineering, and Technology. This book has a special role to play in the curriculum of all branches of Science, Engineering, and Technology and will hopefully present valuable guidelines to young graduates. An effort has been made to cover the fundamentals and applications of NANO-PHOTONICS. Chapter 1 focused primarily on the fundamentals of optics, photonics, and nano-photonics. Chapter 2 gives a flavour of nano-photonics and interactions. Chapter 3 is focused on fabrication and applications of photonic crystals and devices. Chapter 4 gives the details of nanophotonic devices. Chapter 5 explains about nanophotonic fabrications and nanophotonic systems.