Holography for Nonlinear Imaging and Metamaterial Characterization

Open Access
Author:
Ma, Ding
Graduate Program:
Electrical Engineering
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
June 29, 2015
Committee Members:
  • Zhiwen Liu, Dissertation Advisor
  • Zhiwen Liu, Committee Chair
  • Qiming Zhang, Committee Member
  • Iam Choon Khoo, Committee Member
  • Siyang Zheng, Committee Member
Keywords:
  • holography
  • nonlinear optics
  • optical characterization
Abstract:
This work presents the application of optical holography for optical characterization and nonlinear imaging. Holography encodes the phase of a complex optical field into the intensity distribution of the interference pattern between the signal and the reference fields. The first part of this thesis is devoted to the metamaterial characterization using spectral holography. Metamaterial is a class of artificial material having novel properties not existing in nature. The developed spectral holography measurement system uses a supercontinuum as the light source, which enables broadband characterization covering a wavelength range from 600nm to 1700nm. Spectral holography is applied to measure the complex transmission and reflection coefficient of two metamaterials, namely a zero-index-material (ZIM) on a substrate that has effective zero refractive index at 1.55μm, and a Dielectric Magnetic Mirror (DMM) that can achieve high reflection efficiency. The transmission and reflection coefficients are then used to deduce the corresponding refractive index and impedance. The optical characteristics of two metasurface based wave plates (a half wave plate and a quarter wave plate) are also measured. The experimental results and the simulations show good agreements. I also developed a unique sum frequency generation (SFG) spectroscopic holography for chemical selective 3D imaging on organic samples. The strong SFG emission attributed to the vibrational resonance enhanced second order nonlinear susceptibility has been utilized for label free chemical selective imaging of biosamples. I have demonstrated the single shot, scanning-free technique for 3D imaging of biologically interesting samples such as starch and D-galactose, using a pump and probe picoseconds laser system. The hologram is recorded digitally and processed with numerical reconstruction algorithm. SFG holography can potentially enable high speed 3D chemical selective imaging of live biomaterials.