Abstract: Photoacoustic and photoluminescence studies on CdS$-1$MIN@x$/Se$-x$/ nanocrystals grown in a transparent borosilicate glass matrix are reported. Our analysis points out the important role played by the Coulomb interaction in quantum dots whose radii range around the exciton Bohr radius: (1) strong polar coupling to the lattice; (2) observation of optical transitions with different radial quantum numbers in photoacoustic spectra. Photoacoustic spectroscopy has allowed the direct observation of several low and high index states. The experimental results have been shown to be in good agreement with the effective mass- approximation calculations in which the strain effects, due to the hydrostatic compression of the glass matrix on semiconductor nanocrystals, and size dependent dielectric constant have been taken into account. !16
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机译：摘要：报道了在透明硼硅酸盐玻璃基质中生长的CdS $ -1 $ MIN @ x $ / Se $ -x $ /纳米晶体的光声和光致发光研究。我们的分析指出了库仑相互作用在量子点中的重要作用，这些量子点的半径范围为激子玻尔半径：（1）与晶格的强极性耦合; （2）在光声光谱中观察具有不同径向量子数的光学跃迁。光声光谱法可以直接观察几个低折射率和高折射率状态。实验结果已经表明与有效的质量近似计算非常吻合，其中考虑了由于玻璃基体在半导体纳米晶体上的静水压缩而产生的应变效应以及尺寸相关的介电常数。 ！16
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