The paper presents unique functional capabilities of silicon with nanoclusters of impurity atoms with various characters. It is shown that, depending on the nature of the clusters, it is possible to expand the spectra...The paper presents unique functional capabilities of silicon with nanoclusters of impurity atoms with various characters. It is shown that, depending on the nature of the clusters, it is possible to expand the spectral diapason of sensitivity towards the IR region and obtain silicon with anomalously high negative mag-netoresistance (Δρ/ρ > 100%) at room temperature. The formation of clusters of impurity atoms with different nature and concentration in the lattice of semiconductor materials is a new approach for obtaining bulk-nanostructured silicon with unique physical properties.展开更多
该文提出一种利用阵列划分的近场到达方向(Direction Of Arrival,DOA)估计算法.首先,通过划分阵列和四阶累积量构造一个仅包含DOA信息的托普利兹矩阵;然后,由于多重信号分类(Multiple Signal Classification,MUSIC)算法的空间谱在谱峰...该文提出一种利用阵列划分的近场到达方向(Direction Of Arrival,DOA)估计算法.首先,通过划分阵列和四阶累积量构造一个仅包含DOA信息的托普利兹矩阵;然后,由于多重信号分类(Multiple Signal Classification,MUSIC)算法的空间谱在谱峰处是一个断点、且趋近较大值,因此,为得到高分辨率谱峰,该算法通过求解空间谱的一阶导数构造一个新“空间谱”;最后,通过一维MUSIC算法估计近场信源的距离.仿真结果表明,该算法在低信噪比下提高了DOA的估计精度,且不需要二维谱峰搜索,只需K+1次一维谱峰搜索.展开更多
We demonstrate a highly compact third-order elliptical micro-ring add-drop filter based on a silicon-on-insulator wafer. The elliptical micro-ring resonator has a major radius of 6μm （minor radius of 4.112μm） and ...We demonstrate a highly compact third-order elliptical micro-ring add-drop filter based on a silicon-on-insulator wafer. The elliptical micro-ring resonator has a major radius of 6μm （minor radius of 4.112μm） and a large free spectral range of 18 nm. Experimental results show a box-like channel dropping response, which has a 3 dB bandwidth of -2.7nm, high out-of-band signal rejection of around 40dB and a very low drop loss （〈0.5dB）. Simulation agrees well with the experiments. The footprint of the whole chip is only 0.0003mm2.展开更多
文摘The paper presents unique functional capabilities of silicon with nanoclusters of impurity atoms with various characters. It is shown that, depending on the nature of the clusters, it is possible to expand the spectral diapason of sensitivity towards the IR region and obtain silicon with anomalously high negative mag-netoresistance (Δρ/ρ > 100%) at room temperature. The formation of clusters of impurity atoms with different nature and concentration in the lattice of semiconductor materials is a new approach for obtaining bulk-nanostructured silicon with unique physical properties.
文摘该文提出一种利用阵列划分的近场到达方向(Direction Of Arrival,DOA)估计算法.首先,通过划分阵列和四阶累积量构造一个仅包含DOA信息的托普利兹矩阵;然后,由于多重信号分类(Multiple Signal Classification,MUSIC)算法的空间谱在谱峰处是一个断点、且趋近较大值,因此,为得到高分辨率谱峰,该算法通过求解空间谱的一阶导数构造一个新“空间谱”;最后,通过一维MUSIC算法估计近场信源的距离.仿真结果表明,该算法在低信噪比下提高了DOA的估计精度,且不需要二维谱峰搜索,只需K+1次一维谱峰搜索.
基金Supported by the National High Technology Research and Development Program of China under Grant No 2015AA016904the National Key Research and Development Plan of China under Grant No 2016YFB0402502the National Natural Science Foundation of China under Grant No 61275065
文摘We demonstrate a highly compact third-order elliptical micro-ring add-drop filter based on a silicon-on-insulator wafer. The elliptical micro-ring resonator has a major radius of 6μm （minor radius of 4.112μm） and a large free spectral range of 18 nm. Experimental results show a box-like channel dropping response, which has a 3 dB bandwidth of -2.7nm, high out-of-band signal rejection of around 40dB and a very low drop loss （〈0.5dB）. Simulation agrees well with the experiments. The footprint of the whole chip is only 0.0003mm2.
