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We demonstrate the efficient generation of ultraslow bright and dark optical solitons in a lifetime-broadened three-level atomic medium by using only a low-intensity pulsed laser radiation. The proposed scheme may be useful, in principle, for the control technology of optical delay lines and optical buffers. 相似文献
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We put forward a scheme for preparation of an entangled multiparty W state between different modes of radiation field inside high-Q cavity QED. Our scheme is based on the interaction of a two-level atom with the cavity field with the assistance of a strong classical driving field for precalculated interaction time. In principle, the scheme can be extended to prepare an N-party W state. The required experimental techniques are within the scope of what can be obtained in the microwave cavity QED setup. 相似文献
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应用荧光纳米颗粒测定痕量铜 总被引:1,自引:0,他引:1
制备了异硫氰酸罗丹明B(TRITC)荧光纳米颗粒,于pH 6.0的磷酸盐缓冲溶液中此荧光纳米颗粒在558 nm光的激发下,于586 nm波长处发射荧光.铜(Ⅱ)的存在可使此荧光纳米颗粒溶液的荧光发生猝灭.借此,构建了一种检测微量铜的方法.在最佳试验条件下,该方法测定铜的线性范围为5.00×10-5~3.50×10-4 mol·L-1,其回归方程为F/F0=8.425 2-1.009×10-6 c,检出限为3.55×10-5 mol·L-1. 相似文献