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oe1(光电查) - 科学论文

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  • Effect of Macro-scale Mechanical Stress of Silicon Wafer on Room Temperature Photoluminescence Signals

    摘要： Mechanical stress was applied to single side polished and double side polished Si wafers in polypropylene wafer containers for different localized stress levels and durations. Room temperature photoluminescence (RTPL) spectra from Si wafers were measured before and after applying localized mechanical stress. Significant changes (up to 26% increase) in RTPL intensity were measured from areas under different stress levels even 1 year after the fixtures for mechanical stress generation were removed. Significant effects of localized mechanical stress on RTPL intensity variations were measured up to 49 days after the fixture removal. Nearly fully relaxed RTPL signatures for localized mechanical stress were measured 450 days after the fixture removal. RTPL intensity is found to be very sensitive to the externally applied macro-scale mechanical stress of Si wafers and residual (or memorized) internal stress even after removal of fixtures for external mechanical stress generation.

    关键词： Silicon,room temperature photoluminescence,stress relaxation,mechanical stress

    更新于2025-09-23 15:23:52

  • Telecommunication wavelength confined Tamm plasmon structures containing InAs/GaAs quantum dot emitters at room temperature

    摘要： We experimentally demonstrate gold microdisc structures that produce con?ned Tamm plasmons (CTPs)— interface modes between a metal layer and a distributed Bragg re?ector— resonant around 1.3 μm. Quantum dots grown within the structures show an order of magnitude increase in the photoluminescence emitted at room temperature. Varying the disc diameter, we show spectral tuning of the resonance and measure the dispersion relation as evidence of mode con?nement. The simplicity of fabrication and tuneability of these structures make CTPs an ideal platform for making scalable telecom devices based on quantum dots.

    关键词： Tamm plasmons,room temperature,photoluminescence,quantum dots,telecom wavelengths

    更新于2025-09-12 10:27:22