Department of Physics, Chungnam National University, Daejeon, 34134, South Korea.
Korea Basic Science Institute, Daejeon, 34134, South Korea.
Sci Rep. 2017 Aug 11;7(1):7907. doi: 10.1038/s41598-017-08355-6.
We report surface plasmon (SP) lasing in metal/semiconductor nanostructures, where one-dimensional periodic silver slit gratings are placed on top of an InGaAsP layer. The SP nature of the lasing is confirmed from the emission wavelength governed by the grating period, polarization analysis, spatial coherence, and comparison with the linear transmission. The excellent performance of the device as an SP source is demonstrated by its tunable emission in the 400-nm-wide telecom wavelength band at room temperature. We show that the stimulated emission enhanced by the Purcell effect enables successful SP lasing at high energies above the gap energy of the gain. We also discuss the dependence of the lasing efficiency on temperature, grating dimension, and type of metal.
我们报告了在金属/半导体纳米结构中实现的表面等离激元（SP）激光，其中在 InGaAsP 层上放置了一维周期性的银狭缝光栅。激光的 SP 性质通过发射波长由光栅周期、偏振分析、空间相干性和与线性传输的比较来确认。该器件作为 SP 源的优异性能通过其在室温下在 400nm 宽的电信波长带中的可调谐发射得到证明。我们表明，由 Purcell 效应增强的受激发射使得在高于增益带隙的高能下成功实现了 SP 激光。我们还讨论了激光效率对温度、光栅尺寸和金属类型的依赖性。
