Preparation and Fundamental Properties of Magneto-Optic Analog Spatial Light Modulator with One Dimensional MagnetoPhotonic Crystals

摘要

Spatial light modulator (SLM) is a real-time programmable device for modifying amplitude, phase or polarization of optical wave front by electrically controlled signals. Up to date, various types of SLMs with pixel arrays, such as a liquid crystal SLM, have been developed. Recently, SLMs have received much attention as a light modulator in holographic data storage which requires high speed SLMs for ensuring the high data transfer rate. This requirement can be fulfilled with the magneto-optic SLM (MOSLM). In fact, our recent studies showed that the pixel switching speed of our MOSLM with LPE-grown magnetic garnet reached at 15ns, the value of which is adequate for the holographic data storage[1]. In this paper, for the first time, we present the preparation and fundamental properties of analog MOSLM which is composed of one-dimensional (1D) magnetophotonic crystals (MPCs)[2]. The use of 1D-MPCs in MOSLM is very useful because large Faraday rotation angle of the medium can be obtained at a particular wavelength of light by designing the medium structure, which results in considerable improvement of optical contrast in MOSLM.