Device for storing power supply information of e.g. TV, supplies electrical charge carriers to nanoparticles selectively in regions in specific operating state

The device has storage element having nanoparticle arrangement (50) with supporting material (2) surrounding nanoparticles. The storage element supplies electrical charge carriers to nanoparticles selectively in regions in first operating state, and prevents supplied charge carriers from flowing away from nanoparticles in second operating state. The supplied charge carriers change fluorescence property of nanoparticles to which carriers are supplied. The region in which electrical charge carriers are supplied is determined by optically exciting the storage element. Independent claims are included for the following: (1) optical information carrier; (2) method for operating information storage device; (3) method for storing information; and (4) information storage apparatus.