Zhao Hong-Quan, Fujiwara Masazumi, Takeuchi Shigeki
Research Institute for Electronic Science, Hokkaido University, Sapporo 060-0812, Japan.
Opt Express. 2012 Jul 2;20(14):15628-35. doi: 10.1364/OE.20.015628.
Substrates effect is observed on the suppression of the phonon sideband from nitrogen vacancy (NV) centers in 50nm diamond nanocrystals at cryogenic temperatures. As a quantitative parameter of the population of phonon sidebands, the Debye-Waller factor is estimated from fluorescence spectra on glass, silicon, and silica-on-silicon substrates. Fluorescence spectra of negatively charged NV centers in nanodiamonds on silica-on-silicon substrates have average and maximum Debye-Waller factors of 12.7% (which is about six times greater than that of samples on glass substrates) and 19.3%, respectively. This effect is expected to be very important for future applications of NV centers in quantum information science and nanosensing.
在低温下，观察到了衬底对50纳米金刚石纳米晶体中氮空位（NV）中心声子边带抑制的影响。作为声子边带数量的定量参数，德拜-瓦勒因子是根据玻璃、硅和硅基二氧化硅衬底上的荧光光谱估算得出的。硅基二氧化硅衬底上纳米金刚石中带负电NV中心的荧光光谱，其德拜-瓦勒因子的平均值和最大值分别为12.7%（约为玻璃衬底上样品的六倍）和19.3%。预计这种效应对于NV中心在量子信息科学和纳米传感领域的未来应用非常重要。
