Bragg Diffraction of Light from Magnetostatic and Magnetoelastic Waves,
Abstract
Theoretical and experimental investigations have been conducted on the use of Bragg and Raman-Nath diffraction of laser light from magnetostatic and magnetoelastic waves, propagating in Yttrium Iron Garnet (YIG). YIG is opaque to visible light, but highly transparent in the near infrared, and a light wavelength of 1.15 micrometers was therefore used. The properties of light diffraction from plane spin waves were derived, and shown to arise from the same magneto-optic effect which causes optical Faraday rotation. The linear magneto-optic coefficient m sub l, relating the change in dielectric constant to the rf magnetization components of the spin wave, was theoretically found to be 0.0000025/oe at a 1.15 micrometers wavelength. Experiments were carried out both for the purpose of verifying the predicted light diffraction behavior, and in order to use light diffraction as a tool in the study of magnetoelastic wave phenomena. Results are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0715253
Entities
People
- David A. Wilson
Organizations
- Stanford University