Efficient light amplification in low gain materials due to a photonic band edge effect
Efficient light amplification in low gain materials due to a photonic band edge effect
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DOI：
10.1364/oe.20.007071
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发表时间：
2012-03-26
期刊：
影响因子：
3.8
通讯作者：
Pelant, I.
中科院分区：
文献类型：
--
作者：
Ondic, L.;Pelant, I.
增加发光源的光学增益的可能性之一是通过将其嵌入光子晶体（PhC）中。如果PhC的性质被调谐，使得具有增益的光源的发射波长福尔斯在PhC的光子带边缘附近，则由于光子结构上的光的多次反射引起的带边缘附近的光模式的低群速度，受激发射可以被显著增强。在这里，我们进行了模拟的光子带边效应的光强度的光谱宽源与金刚石光子晶体与低光学增益。我们表明，即使对于低增益的情况下，高达10倍的光强度输出的增加，可以获得由只有19个周期层的无限高的金刚石棒有序成一个正方形晶格的二维光子晶体。此外，考虑到实验上可行的结构组成的金刚石棒的有限高度- PhC板-我们表明，增益增强，即使减少相比，无限棒的理想情况下，仍然保持相对较高。对于这种特殊的结构，我们表明，可以实现高达3.5倍的光强度增强。(C)2012美国光学学会
One of the possibilities of increasing optical gain of a light emitting source is by embedding it into a photonic crystal (PhC). If the properties of the PhC are tuned so that the emission wavelength of the light source with gain falls close to the photonic band edge of the PhC, then due to low group velocity of the light modes near the band edge caused by many multiple reflections of light on the photonic structure, the stimulated emission can be significantly enhanced. Here, we perform simulation of the photonic band edge effect on the light intensity of spectrally broad source interacting with a diamond PhC with low optical gain. We show that even for the case of low gain, up to 10-fold increase of light intensity output can be obtained for the two-dimensional PhC consisting of only 19 periodic layers of infinitely high diamond rods ordered into a square lattice. Moreover, considering the experimentally feasible structure composed of diamond rods of finite height - PhC slab - we show that the gain enhancement, even if reduced compared to the ideal case of infinite rods, still remains relatively high. For this particular structure, we show that up to 3.5-fold enhancement of light intensity can be achieved. (C) 2012 Optical Society of America