Integrated photonics and the study of the emission spectra and efficiency of light sources are promising research directions in the optoelectronics area. Here, we present an elliptical microcavity and derive the expression for its local density of state. Theoretical analyses and numerical simulations are performed to observe the broadening of the spontaneous emission spectra (SES) when placing the emitter in circular and elliptical microcavities. The results show that an SES with a full width at half-magnitude (FWHM) of 200 nm in free space is broadened, to one with an FWHM of 400 nm, in the elliptical microcavity. This approach can be used for any modification of spontaneous emission.

中文翻译：

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使用二维椭圆微腔操纵自发发射光谱

集成光子学以及对发射光谱和光源效率的研究是光电子领域的有前途的研究方向。在这里，我们提出了一个椭圆形微腔并推导了其局部状态密度的表达式。进行理论分析和数值模拟，以观察将发射器放置在圆形和椭圆形微腔中时自发发射光谱（SES）的变宽。结果表明，在椭圆形微腔中，在自由空间中具有200 nm半峰全宽（FWHM）的SES扩展为具有400 nm FWHM的SES。该方法可用于自发发射的任何修改。