Optical memory: What a difference

Alistair J. Poustie

We demonstrate an all-optical memory which can discriminate between input data pulses of differing amplitude. Only optical pulses with amplitudes above a predetermined threshold are stored and their amplitudes are equalised. We have demonstrated an all-optical regenerative memory with variable storage threshold and amplitude restoration. This functionality should be scaleable to high data rates approaching 100 Gbits and to low latency memory stores using integrated TOAD/SLALOM nonlinear optical switching devices.

立野 公男

Bruno F. Soares, Maxim V. Bashevoy, F. Jonsson +2 more

A nanoparticle undergoing light-induced transformations between structural phases with different optical properties is an inheritably bistable structure and this bistability can be used to create a resonator-free optical memory element, operating at very low power levels. We experimentally demonstrate this memory functionality using a film of gallium nanoparticles, and we present a method for differentially accessing the logic state of the memory using a modulated optical probe beam.

Paul W. Nutter

Makoto Naruse, Takashi Yatsui, Wataru Nomura +1 more

Abstract: We propose a hierarchical optical memory system in which near-fields and far-fields read detailed dipole distributions and features within a region-of-interest, respectively. With hierarchical coding, near- and far-field accesses are associated with different hierarchical information. ©2005 Optical Society of America OCIS codes: (210.0210) Optical data storage; (210.4680) Optical memories; (070.6020) Signal processing

Arun Madan, Melvin P. Shaw