[13p-B415-1~14] 3.3 Information photonics and image engineering

[13p-B415-1] [Young Scientist Presentation Award Speech] Evaluation of recording and reconstruction characteristics in surface holographic memory without grating overlapping

〇Soki Hirayama¹, Ryushi Fujimura², Yoshito Tanaka¹, Tsutomu Shimura¹ (1.IIS, The Univ. of Tokyo, 2.Utsunomiya Univ.)

Keywords:holography, holographic memory, optical memory

Surface holographic memory can be expected as a new optical memory that has different characteristics from conventional holographic memory. However, higher-order diffracted light and degeneracy of gratings caused by Raman-Nath diffraction reduce the signal-to-noise ratio (SNR) of reconstructed signal and multiplicity of hologram. Therefore, we proposed that these noises can be reduced by designing a surface type hologram without grating overlapping, and we showed it from both the numerical simulation and the experimental data.