Tetrazine Systems for Storage Devices
Original Publication Date: 1978-Aug-01
Included in the Prior Art Database: 2005-Feb-21
In optically addressed information storage systems which utilize photo-chemical reactions, it is desirable to have a nondestructive optical method for reading the optically written information. A useful method is to employ as the photochemically active species a substance whose photochemical response to the light varies more than linearly with intensity, so that information may be written at high intensity but read nondestructively at low intensity. The greater the nonlinearity of the material's response, the greater will be the number of read operations possible before the stored information must be rewritten. This method allows reading and writing to be implemented with a single light source at a single frequency, for example, a laser.