Proposed spin-photon memory as an optical buffer memory for high-speed networks

摘要

A non-volatile high-speed optical memory, which utilizes the magnetization reversal of nanomagnet by spin-polarized photo-excited electrons, is proposed. The feasibility of high-speed recording and high-speed readout was studied. It was demonstrated experimentally that one selected pulse from a package of two optical data pulses with an interval of 450 fs can solely excite the spin-polarized electrons without a disturbance from the unselected optical data pulse. That proves that the recording speed of the memory can reach 2.2 TBit/sec. The optical detection of the magnetization direction of a Fe nanomagnet embedded into the (Al,Ga)As optical waveguide was demonstrated for the nanomagnet size of 3μm × 4μm with signal-to-noise ratio of 4.8 dB.