The emission nebula is found near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4, 000 light-years away.
这个发射星云在南天星座天坛座另一个巨大的暗分子云的边缘被发现，离我们约4000光年。
The band edge emission was observed in the PL spectra at room temperature. Its intensity was related to quality of the crystal.
在室温下的PL测量中见到了带边发射，其强度与晶体质量有关。
The second atomic species has a characteristic emission peak that substantially matches the absorption edge of the detector.
第二原子种类具有实质上匹配检测器的吸收边沿的特征发射峰值。
In general, hydrogenation enhances the band edge luminescence and passivates the green emission.
一般而言，氢化会增强带边发射并钝化绿光发射。
The T-shaped edge field emitter arrays were successfully fabricated with each emitter possessing much larger emission area than needle-shaped emitters.
提出了一种T形结构的边缘场发射阴极，它具有比通常的场发射体的发射面积大得多的特点。
Furthermore, photoluminescence (PL) spectroscopic analysis shows a strong near band edge emission.
同时，光致发光(PL)光谱的分析显示出强的近带边发射峰。
Spontaneous emission can be totally suppressed or strongly enhanced depending on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density.
通过原子上能级与光子频率带隙边缘的相对位置或者光子态密度，可以抑制或增强原子的自发辐射。
Blue shift appears both on the absorb edges in the absorption spectra and on the band-edge emission in the luminescence spectrum.
在紫外吸收谱中表现为吸收边明显蓝移，而在光致发光谱中，表现为带边发射的蓝移。
The testing result of photoluminescence spectra at room temperature shows that all the samples have two emission bands, that is, UV emission band near the band-edge and visible emission band.
室温下样品光致发光光谱的测量结果表明：所有的样品均有两个发射带，即近带边紫外发射和可见发射带。
The testing result of photoluminescence spectra at room temperature shows that all the samples have two emission bands, that is, UV emission band near the band-edge and visible emission band.
室温下样品光致发光光谱的测量结果表明：所有的样品均有两个发射带，即近带边紫外发射和可见发射带。
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