Back to results
US 12,142,307 B2Granted
Optical memory, optical diffraction element, and recording method
AssigneeFujikura Ltd.
InventorYuichiro Kunai
Life of this patent
Estimating the term…
Abstract
An optical memory includes a support and nanoparticles, each of which changes between a crystal phase and an amorphous phase when irradiated with light. The nanoparticles are supported by the support and spaced apart from each other in one or both of an in-plane direction of a face of the support and a direction normal to the face of the support.
Claims3
A light diffraction element comprising:
- cells having respective thicknesses or respective refractive indexes set independently;
- and
- an optical memory, directly or indirectly disposed on the cells, comprising:
- a support;
- and
- nanoparticles, each of which changes between a crystal phase and an amorphous phase when irradiated with light, wherein
- the nanoparticles are supported by the support and spaced apart from each other in one or both of an in-plane direction of a face of the support and a direction normal to the face of the support, and
- one or more of the nanoparticles are disposed in each of sections of the optical memory, wherein each of the sections is a region obtained by projecting a bottom face of each of the cells on to the face of the support.
5 more elements
A recording method that uses an optical memory, the recording method comprising:
- causing signal light waves to enter the optical memory, wherein
- each of the signal light waves has a spatial intensity distribution that represents information, and
- the signal light waves are generated at time intervals;
- and
- recording, on the optical memory, each of the signal light waves which serve as light for writing, wherein
- the optical memory comprises nanoparticles, each of which changes between a crystal phase and an amorphous phase when irradiated with light, and
- the nanoparticles are supported by the support and spaced apart from each other in one or both of an in-plane direction of a face of the support and a direction normal to the face of the support.
4 more elements
Dependencies are inferred from the claim text.