So sánh phương pháp

	Kỹ thuật Z-scan	Quang học Fourier
Lĩnh vực	Quang học	Quang học
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1990	1822
Người khởi xướng	Mansoor Sheik-Bahae, David Hagan, and Eric Van Stryland	Joseph Fourier and Ernst Abbe
Loại	Measurement technique	Spectral decomposition method
Công trình gốc	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.	Goodman, J. W. (1968). Introduction to Fourier Optics. McGraw-Hill.
Tên gọi khác	Z-scan method, nonlinear refraction measurement	frequency-domain optics, wave optics, diffraction theory
Liên quan	3	3
Tóm tắt	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.	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.