Dr. R. Ganapathy


This course outlines physically the intuitive concepts of nanophotonics using the concept of optical near-fields. Optical near-field is an electromagnetic field that mediates the interaction between nanometric materials used for the realization of novel photonic devices, fabrication techniques, and systems.

  • In Unit-I, the background, history, and the present status of research and development in nanophotonics and related technologies, is dealt with.
  • Unit-II presents a novel theoretical model and a new approach that describes the interaction between nanometric material systems via optical near-fields in a physically intuitive manner. The designing aspects of nanophotonic devices and systems and their performances are analyzed using this model.
  • Unit-III and Unit-IV deal with nanophotonic devices and fabrication techniques.
  • Unit-V presents a novel nanophotonic system realized by assembling nanophotonic devices.
  • In Unit-VI, the fundamentals of nano-biophotonics are dealt with.


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MODULE-I: Introduction to Nanophotonics

Modern optical science and technology and the diffraction limit – Breaking through  the diffraction limit – Nanophotonics and its true nature.


Module 1


MODULE -II: Basis of Nanophotonics

Optical near fields and effective interactions as a base for nanophotonics – Principles of operations of nanophotonic devices using optical near fields – Principles of nanofabrication using optical near fields.


Module 2


MODULE -III: Fundamentals of Nanophotonic Devices

Excitation energy transfer – Device operation: nanophotonic AND gate & nanophotonic OR gate – Interconnection with photonic devices – Room temperature operation.


Module 3


MODULE -IV: Fundamentals of Nanophotonic Fabrication

Adiabatic nanofabrication – Nonadiabatic nanofabrications: near field optical CVD and near field photolithography – Self assembling method via optical near field interactions – Regulating the size and position of nanoparticles using size dependent resonance – Size controlled, position controlled and separation controlled alignment of nanoparticles.


Module 4


MODULE -V: Fundamentals of Nanophotonic Systems

Introduction – Optical excitation transfer and system fundamentals – Parallel architecture using optical excitation transfer – Interconnections for nanophotonics – Signal transfer and environment – tamper resistance – Hierarchy in nanophotonics and its system fundamentals.


Module 5


MODULE -VI: Fundamentals of Nano-Biophotonics

Introduction – The cell: scale and constituents – Origin and optical contrast mechanisms – Classical contrast mechanisms: bright field, dark field, phase contrast and interferometric contrast – Fluorescence contrast mechanism – Nonlinear microscopy based on second harmonic generation and coherent anti-Stokes Raman scattering – Reduction of the observation volume – Far field methods: 4Pi microscopy, microscopy on a mirror and stimulated emission depletion – Near field methods.


Module 6