Σύγκριση μεθόδων

	Z-scan	Χρονικού Τομέα Πεπερασμένων Διαφορών	Οπτική Fourier
Πεδίο	Οπτική	Οπτική	Οπτική
Οικογένεια	Process / pipeline	Process / pipeline	Process / pipeline
Έτος προέλευσης	1990	1966	1822
Δημιουργός	Mansoor Sheik-Bahae, David Hagan, and Eric Van Stryland	Kane Yee	Joseph Fourier and Ernst Abbe
Τύπος	Measurement technique	Finite-difference algorithm	Spectral decomposition method
Θεμελιώδης πηγή	Sheik-Bahae, M., Said, A. A., Wei, T. H., Hagan, D. J., & Van Stryland, E. W. (1990). Sensitive measurement of optical nonlinearities using a single beam. IEEE Journal of Quantum Electronics, 26(4), 760-769.	Yee, K. S. (1966). Numerical solution of initial boundary value problems involving Maxwell's equations in isotropic media. IEEE Transactions on Antennas and Propagation, 14(3), 302-307.	Goodman, J. W. (1968). Introduction to Fourier Optics. McGraw-Hill.
Εναλλακτικές ονομασίες	Z-scan method, nonlinear refraction measurement	FDTD, Yee scheme	frequency-domain optics, wave optics, diffraction theory
Συναφείς	3	3	3
Σύνοψη	The Z-scan technique is an experimental method for measuring nonlinear optical properties of materials, particularly third-order susceptibility and nonlinear absorption. Developed by Sheik-Bahae, Hagan, and Van Stryland in 1990, Z-scan uses a tightly focused laser beam and moves the sample along the beam propagation axis (z-axis), recording transmission variation to deduce nonlinear refraction and absorption coefficients with high sensitivity.	The Finite-Difference Time-Domain method is a computational technique for solving Maxwell's equations by discretizing space and time on a grid. Introduced by Kane Yee in 1966, FDTD is a foundational approach in computational electrodynamics and optical simulation, enabling direct modeling of electromagnetic wave propagation through complex media.	Fourier optics is a mathematical framework that analyzes optical systems and phenomena using Fourier transforms and frequency-domain methods. Grounded in Joseph Fourier's 1822 work on heat diffusion and Ernst Abbe's microscopy theory, this approach decomposes optical fields into plane waves or spatial frequencies, revealing how optical systems manipulate and filter these components to produce images and transmit information.