介质厚度对光量子阱束缚态波长的调整

The Adjustment to the Wavelength on Photon Confined States by the Dielectrics′ Thickness in Photonic Quantum Well Structure

用传输矩阵法计算了不同介质厚度对光量子阱结构的传输特性。计算结果表明:光子的束缚效应将导致波长的量子化。通过微小地改变阱区和垒区介质的厚度可改变束缚态的波长,且阱区和垒区介质厚度的变化与束缚态波长的变化呈良好的线性关系,阱区介质厚度的变化对束缚态波长的变化大于垒区。阱区介质厚度与束缚态半峰宽呈阶梯形状降低,而阱区介质厚度与束缚态品质因子呈阶梯形状升高。此结果为设计所需要的束缚态波长光量子阱结构提供了理论依据,也为光量子阱实现热敏开关提供了理论基础。

By using the method of optical transfer matrix, the transmission characteristics of PQW structure with different dielectrics＇ thickness are studied. The investigation results show that the wavelength is quantized for confined effect. The wavelength of confined states can be altered by changing the dielectrics＇ thickness in well and barrier a little. The relation of the change of confined wavelength for PQW structure on each change of dielectric thickness is linear, and the adjustment to the wavelength with the dielectric thickness change in well is more obvious than that in barrier. The half width on the confined state is steppedly increased with of transmission peak is steppedly reduced and the Q-factor the increasing of the dielectric thickness in well. The conclusion can be used to obtain the desired wavelength on confined states and provides theoretical basis for temperature sensing switch.