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设计了用反Opal结构光子晶体测量透明液体折射率的实验.根据布拉格公式推导了用反Opal光子晶体测量透明液体折射率的公式.利用紫外-可见分光光度计分别测得光子晶体处于空气和透明液体中的透射谱,由透射谱分别确定光子晶体处于2种介质中的禁带中心波长,将中心波长代入测量公式即可得到透明液体折射率.实验测量了水和甘油的折射率,得到了与公认值相吻合的结果. 相似文献
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基于实验班管理模式的实验开放教学网络管理系统 总被引:1,自引:1,他引:0
针对开放式实验教学中存在的问题,研发了基于实验班管理模式的实验开放教学网络管理系统.本文介绍了该系统的研制背景、基本结构、主要功能及其特点. 相似文献
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In addition to the phonon variable there is the phason variable in
hydrodynamics for quasicrystals. These two kinds of hydrodynamic
variables have different transformation properties. The phonon
variable transforms under the vector representation, whereas the
phason variable transforms under another related representation.
Thus, a basis (or a set of basis functions) in the representation
space should include such two kinds of variables. This makes it more
difficult to determine the physical property tensors of
quasicrystals. In this paper the group-theoretical method is given
to determine the physical property tensors of quasicrystals. As an
illustration of this method we calculate the third-order elasticity
tensors of quasicrystals with five-fold symmetry by means of basis
functions. It follows that the linear phonon elasticity is
isotropic, but the nonlinear phonon elasticity is anisotropic for
pentagonal quasicrystals. Meanwhile, the basis functions are
constructed for all noncrystallographic point groups of
quasicrystals. 相似文献
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本文以单分散聚苯乙烯(Polystyrene,简写为PS)微球为模板颗粒,采用室温漂浮自组装法组装了PS opal模板,然后用液相沉积技术填充、去除模板制备了TiO2反opal膜,最后采用化学浴沉积法(Chemistry Bath Deposition,简写为CBD)在TiO2反opal膜上沉积CdS量子点。以CdS量子点敏化的TiO2反opal膜为光阳极组装太阳能电池并测试其光电性能。实验结果表明:CBD沉积CdS量子点次数对TiO2反opal膜电极的光电性能有影响。在本文实验条件下,当CBD沉积次数为5次时,CdS量子点敏化的TiO2反opal膜电极的太阳能电池具有最高光电转化效率。 相似文献