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首页> 外文期刊>Nanotechnology >Spectroscopy of shallow InAs/InP quantum wire nanostructures
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Spectroscopy of shallow InAs/InP quantum wire nanostructures

机译：浅InAs / InP量子线纳米结构的光谱

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A comprehensive investigation of the optical properties of InAs/InP(001) quantum wires (QWrs) and their parent quantum well system formed by the deposition of 4 ML (monolayers) of InAs on InP is carried out by means of temperature dependent photoluminescence (PL) and Fourier transform infrared spectroscopy. Unusual two-branch switching of the excitonic PL band maxima is revealed in the temperature dependence for both wires and wells. This is interpreted in terms of the thermal activation of excitonic ground states of the confined nanostructures. Strong modification of the absorbance line shape leading to the appearance of flat spectral regions in the room temperature spectrum of a QWr sample is interpreted in terms of thermally induced change of the dimensionality: from 1D to anisotropic 2D. This change of dimensionality is detected also in the polarized absorbance measurements through the disappearance or significant reduction of the polarization anisotropy in the regions of the hh1-e1 (hh: heavy hole; e: electron) and 1h1-e1 (1h: light hole) transitions in QWrs.
机译：通过依赖于温度的光致发光（PL）对InAs / InP（001）量子线（QWrs）及其由在InP上沉积4 ML（单层）InAs形成的母量子阱系统的光学性质进行了全面研究）和傅立叶变换红外光谱。导线和孔的温度依赖性揭示了激子PL带最大值的不寻常的两分支切换。这是根据受限纳米结构的激子基态的热活化来解释的。吸光度线形状的强烈变化导致QWr样品在室温光谱中出现平坦的光谱区域，这是由热引起的尺寸变化引起的：从1D到各向异性2D。通过在hh1-e1（hh：重空穴; e：电子）和1h1-e1（1h：轻空穴）区域中极化各向异性的消失或显着降低，在极化吸光度测量中也可以检测到这种尺寸变化。 QWrs的过渡。

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