激活杂质对光量子阱束缚态的影响

Effect of Doped Activate Matter on the Confined State of Photonic Quantum Well Structure

引入复介电常数并利用传输矩阵法研究了激活杂质对光量子阱束缚态的影响。计算结果表明:当在光量子阱结构的一种介质中掺入激活介质使得介质的介电常数具有一个负虚部时,束缚态出现了较强的增益,实现高效光放大。在光量子阱中的垒介质中掺入激活杂质和在阱介质中掺入激活杂质对束缚态的影响规律相似,但在阱介质中掺入激活杂质对光量子阱的放大更明显,光量子阱起放大作用时,阱介质中介电常数的负虚部较小,束缚态出现透射率的峰值也较大。但在光量子阱中掺入激活杂质时,透射波和反射波中的束缚态宽度都变化不大,且束缚态的频率也不变。这为掺激活杂质的光量子阱结构应用于光放大器提供了理论依据。

By using the method of optical transfer matrix and introducing complex permittivity,the effect of doped activate matter on the confined state of photonic quantum well is studied.The investigation results show that a larger transmittance gain appears at the confined state and a higher effective amplification has been realized when a certain imaginary part of the dielectric constant is negative as the activate matter being doped.The effect is alike as activated matter doped to barrier dielectric layer or well one but a more obvious amplification when doped to well dielectric layer,as well as a less imaginary part and a greater apex of the transmissivity in confined state.However,the width of the confined state is slightly changed in the transmission wave and reflected wave.The frequency of the confined state hasn＇t been changed a lot too.The research provides a theoretical evidence for the application of photonic quantum well structure with doped activate matter in optical amplification device.