Material for Photon-Gated Optical Holeburning Storage
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Photon-gated materials form a broad class which provides suitable media for spectral holeburning storage. For this type of material, holeburning at an optical frequency 11 occurs only in the presence of a beam at a second frequency 12 . (The case 11 = 12 would result in holeburning which is non-linear in the laser power, and is included in this class.) These materials overcome an intrinsic limitation of single photon materials; viz after a certain number of read cycles, the absorption band is bleached by the reading beam due to the same mechanism used to write the holes into the band. In photon-gated materials, the bleaching can be turned on and off by irradiation with a second light beam. Reading is done with this gating beam turned off, and the information can be read without bleaching and associated loss of stored data.