Temperature gradient study on the hybrid recording

Abstract

The paper suggests a new scheme of hybrid recording by high refractive index optical waveguide; analyzes the waveguide exit optical field and the near field optical spot energy distribute of the hybrid recording medium surface. We succeed to use the Maxwell electromagnetism theory to model and simulate the waveguide exit energy distribute, obtained the near field optical spot of the hybrid recording medium surface. According to energy balance way, a new model has been adopted and the hybrid recording medium temperature gradient has been studied. The Thermal modeling of two-dimensional transient temperature distributed by the finite element method is studied; with this tool, the hybrid recording medium temperature gradient has been obtained. The hybrid recording areal density may be decided by the dual-gradient (the thermal gradient and magnetic field gradient). According to the simulated results, the track density can reach 500KPTI, if the bit density is 1000kbPI, the area density will be 500Gb/in².