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基于非磁性材料开腔光量子阱结构设计了非磁性闭腔光量子阱和磁性材料光量子阱结构。用时域有限差分法(FDTD)计算了这三种量子阱结构的透射谱和光场分布,研究了各量子阱中的量子化能态,论证了完全依靠自身结构在很大程度上增强透射光谱强度的可行性。研究发现,光子隧穿磁性光量子阱结构时透射率接近1,能量损失小;与非磁性闭腔光量子阱结构相比,能够减小器件体积,增加能带工程的自由调节度,获得更加丰富的光子束缚态,因而更具优越性。计算结果表明,开腔光量子阱为行波阱,这种阱俘获光子的能力较弱;闭腔光量子阱和磁性材料光量子阱均为驻波阱,局域光子的能力很强,且磁性材料光量子阱可以产生更大的光场梯度。
A non-magnetic closed-cavity optical quantum well and a magnetic material optical quantum well structure are designed based on a non-magnetic material open cavity optical quantum well structure. The transmission spectra and the light field distributions of these three kinds of quantum wells are calculated by FDTD, and the quantum energy states in each quantum well are studied. It is demonstrated that the intensity of the transmitted spectrum can be greatly enhanced by relying solely on its own structure Feasibility. The results show that the transmissivity of the photon tunneling magnetic quantum well structure is close to 1, and the energy loss is small. Compared with the non-magnetic closed-cavity quantum well structure, the volume of the device can be reduced and the degree of freedom adjustment of the energy banding project can be increased to obtain richer Photon bound state, and thus more advantages. The calculated results show that the open cavity optical quantum well is a traveling wave trap, and the ability of the trap to capture photons is weak. The closed-cavity optical quantum trap and the magnetic quantum trap are all standing wave traps. The local photons have a strong capability and the optical quantum wells Can produce a larger light field gradient.