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A Technical Seminar

on “ SECOND HARMONIC GENERATION IN MATERIALS”. A Technical Seminar. Under the guidance of :. Dr. Sukant Tripathy. Properties of medium to which light strikes changes with intensity of light Non linear effects depend on the electric field and magnetic field of light beam

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A Technical Seminar

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  1. on “ SECOND HARMONIC GENERATION IN MATERIALS” A Technical Seminar Under the guidance of : Dr. Sukant Tripathy

  2. Properties of medium to which light strikes changes with intensity of light Non linear effects depend on the electric field and magnetic field of light beam Some of the effects are SHG,SFG INTRODUCTION TO NONLINEAR OPTICS

  3. This is a nonlinear process A photon at frequency 2ω is generated from the interaction between light at frequency ω and a medium. SHG is due to nonlinear dependence of the polarization on the electric field SECOND HARMONIC GENERATION

  4. SHG and SFG

  5. Polarization and Electric field Y Polarization P X Electric Field P=0 ( (1) E + (2) E2 + (3) E3 +……………) P=0 ( (1) E0sint + (2) E02 sint+ (3) E03 sint+……) P=0 ( (1) E0sint + 0.5 (2) E02 (1-cos2t)+………)

  6. SHG from Composite Films

  7. SHG and Surfaces

  8. Power Stage 2. Optical Stage 3. Nonlinear Stage 4. Detection Stage 5. Security Stage Components Used in different Stage

  9. Generation of EFISH Half wave plate Half wave plate Polarizer chopper lens F2 F1 F1+F2 Generation of Second Harmonic

  10. EFISH Generation at junction

  11. Improvement of Image Quality Used in Probe Magnetisation Used in Optical Microscopy Used in Remote Detection Used in Laser induced Nuclear Fusion Identification atmospheric pollutants Application

  12. Various effects of optics were studied SHG has rapidly emerged as a powerful contrast mechanism in biomedical application SHG is widely accepted technique to provide monochromatic light source It faces problems due to losses of light CONCLUSION

  13. THANK YOU !!!

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