Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Joint International Symposium on Optical Memory and Optical Data Storage

Hierarchical Optical Memory System Using Near- and Far-Field Accesses

Makoto Naruse, Takashi Yatsui, Wataru Nomura, Motoichi Ohtsu

Published Jan 1, 2005• 0 citations
Publisher

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.
DOI
10.1364/isom_ods.2005.ma3

Related papers

Hierarchical optical memory system using near-and far-field accesses

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

Optics InfoBase Conference Papers•Jan 1, 2005•0 citations

Storage limit of two-photon-based three-dimensional memories with parallel access

M.E. Marhic

For systems that use parallel access by simultaneous writing or reading of bits located in an entire common plane, diffraction sets a limit to the storage density that is far smaller than that for sequential operation. Comparable densities can be achieved by using a three-dimensional waveguiding structure.

Optics Letters•Aug 15, 1991•9 citations

Spatial Optical Memory Based on Coherent Population Oscillations

A. Eilam, I. Azuri, A. V. Sharypov +1 more

We show that a system characterized by long-lived coherent population oscillations (CPO), such as a two-level system that decays via a shelving state, can be used to construct a spatial optical memory.

Frontiers in Optics•Jan 1, 2010•0 citations

The Quantum Electrodynamics of Synergistic Two-photon Processes

Davıd L. Andrews, Nick P. Blake

In this paper it is demonstrated how the phenomena of cooperative Raman scattering and cooperative two-photon absorption may be described in a unified manner, through canonically transforming the system Hamiltonian. The unique features associated with the virtual photon coupling between centres are discussed. In particular it is illustrated how in the near-zone, close proximity leads to two-body two-photon events involving interaction-induced dipoles. In the far-zone, it is shown how the coupling between molecules may be understood in terms of a radiative dipole effect. Attention is focused upon the behaviour of this coupling for distributive and cooperative mechanisms in fluids, and the relative importance of each process discussed, particularly with regard to their very different range dependences. A detailed analysis of the coupling reveals that in two-photon absorption the distributive mechanism dominates, whilst in Raman scattering cooperative energy transfer is favoured. Finally recent progress in the field of synergism is reviewed along with the characteristics associated with synergism in Raman scattering and two-photon absorption.

Journal of Modern Optics•Apr 1, 1990•8 citations

Classical connection between near-field interactions and far-field radiation and the relevance to quantum photoemission

Justin B. Peatross, John Corson, Grayson J. Tarbox

Interference in the far-field radiation pattern emitted from a classical current distribution implies near-field work between different spatial portions of the distribution. We examine this relationship and the essential role of system geometry for the case of two oscillating dipoles and for a Gaussian current distribution. This analysis offers a compelling argument as to why the radiation from a large single-electron quantum wave packet should not exhibit the same destructive interference as that associated with a comparable classical charge density. Our discussion draws attention to the ad hoc heuristics motivating the original derivation of a quantum electron's radiation profile.

American Journal of Physics•Apr 16, 2013•6 citations

Ultra-High Density Optical Memory by Photochemical Hole Burning (PHB) and Multi-Layered PHB System

Motomu Yoshimura, Tetsuya Nishimura, Noriaki Tsukada

We have shown a possibility to store data at more than 600x10 8 bits/cm 2, by forming a double-layered PHB system. This memory density is the highest one reported so far.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•May 19, 1989•4 citations
In this paper it is demonstrated how the phenomena of cooperative Raman scattering and cooperative two-photon absorption may be described in a unified manner, through canonically transforming the system Hamiltonian. The unique features associated with the virtual photon coupling between centres are discussed. In particular it is illustrated how in the near-zone, close proximity leads to two-body two-photon events involving interaction-induced dipoles. In the far-zone, it is shown how the coupling between molecules may be understood in terms of a radiative dipole effect. Attention is focused upon the behaviour of this coupling for distributive and cooperative mechanisms in fluids, and the relative importance of each process discussed, particularly with regard to their very different range dependences. A detailed analysis of the coupling reveals that in two-photon absorption the distributive mechanism dominates, whilst in Raman scattering cooperative energy transfer is favoured. Finally recent progress in the field of synergism is reviewed along with the characteristics associated with synergism in Raman scattering and two-photon absorption.
Interference in the far-field radiation pattern emitted from a classical current distribution implies near-field work between different spatial portions of the distribution. We examine this relationship and the essential role of system geometry for the case of two oscillating dipoles and for a Gaussian current distribution. This analysis offers a compelling argument as to why the radiation from a large single-electron quantum wave packet should not exhibit the same destructive interference as that associated with a comparable classical charge density. Our discussion draws attention to the ad hoc heuristics motivating the original derivation of a quantum electron's radiation profile.