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In this article, SrTiO3 (STO) resistive memories with write-once-read-many-times (WORM) function are fabricated. The STO resistive switching (RS) layers are deposited at sputtering powers of 40-120 W and oxygen flow...

The average fluence distribution ofexcimer laser is an important parameter in various applications ofexcimer laser. But it is more difficulty to measure the parameter due to UV wavelength of excimer laser, very short pulse width, energy undulation among various pulses and or so. Basing on the anisotropy Seeback tensor coefficients, a light-thermo radiation detector made from high Tc superconductor YBa2Cu3O7. was fabricated. The novel advantages ofthis detector are that it functions at room temperature, with very low noise, very fast response and higher sensitivity within a very wide wavelength from ultraviolet to infrared. A measuring system of average fluence distribution of excimer laser is formed with the YBCO lightthermo-detector, a lock-in amplifier and a computer. The principle of the measurement system is analyzed, XeCI laser uluence distribution is measured.

Time-resolved photoluminescence (TRPL) of red mercuric iodide single crystal was measured from 10 K to 110 K. Several near band-gap exciton lines were found in 530 nm and a broad band was found at 630 nm. At near band-gap region photoluminescence comprises fast and slow decay components. Free excitons convert into bound excitons much more efficiently than the bound into the free so that non-radiative decay becomes dominant. At 10 K the dominant decay of bound excitons was radiation. With increasing temperature non-radiative decay became gradually dominant so that luminescent intensity of bound exciton line decreased and lifetime shortened quickly, especially from 20 K to 30 K. The TRPL experiment revealed that 630 nm band originates from the radiative recombination of donor-acceptor pairs. The central wavelength of the band shifted toward shorter wavelength with increasing temperature and the intensity decay can be depicted as t -n(r). The recombination rate of the donor-acceptor pairs is dependent of wavelength and temperature.