Holographic memory devices

A. L. Mikaeliane, V. I. Bobrinev, S M Naumov +1 more

Kimihiko Hirao

H. John Caulfield

Page Oriented Holographic Memories can be used as stored microprograms. Because they may not give highly accurate signal levels, e.g. to 0.1% as may be needed, these holograms should address not a device array but an array of optical bistable shutters through which adjustable stable light beams may pass.

V. V. Aristov

Alexander G. Khitun

In this work, we describe the capabilities of Magnonic Holographic Memory (MHM) for parallel database search and prime factorization. MHM is a type of holographic device, which utilizes spin waves for data transfer and processing. Its operation is based on the correlation between the phases and the amplitudes of the input spin waves and the output inductive voltage. The input of MHM is provided by the phased array of spin wave generating elements allowing the producing of phase patterns of an arbitrary form. The latter makes it possible to code logic states into the phases of propagating waves and exploit wave superposition for parallel data processing. We present the results of numerical modeling illustrating parallel database search and prime factorization. The results of numerical simulations on the database search are in agreement with the available experimental data. The use of classical wave interference may results in a significant speedup over the conventional digital logic circuits in special task data processing (e.g., √n in database search). Potentially, magnonic holographic devices can be implemented as complementary logic units to digital processors. Physical limitations and technological constrains of the spin wave approach are also discussed.