美国西北大学研究出多色光输出的激光器设计

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wangjin001x 2017-07-28 18:00

西北大学研究出多色光输出的激光器设计

mang2004 2017-07-28 20:35

http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2017.126.html `Y$LXF~,Om  

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Band-edge engineering for controlled multi-modal nanolasing in plasmonic superlattices bBg?x 4bu  
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Single band-edge states can trap light and function as high-quality optical feedback for microscale lasers and nanolasers. However, access to more than a single band-edge mode for nanolasing has not been possible because of limited cavity designs. Here, we describe how plasmonic superlattices—finite-arrays of nanoparticles (patches) grouped into microscale arrays—can support multiple band-edge modes capable of multi-modal nanolasing at programmed emission wavelengths and with large mode spacings. Different lasing modes show distinct input–output light behaviour and decay dynamics that can be tailored by nanoparticle size. By modelling the superlattice nanolasers with a four-level gain system and a time-domain approach, we reveal that the accumulation of population inversion at plasmonic hot spots can be spatially modulated by the diffractive coupling order of the patches. Moreover, we show that symmetry-broken superlattices can sustain switchable nanolasing between a single mode and multiple modes. "Tfbd^AU  
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小贝123 2017-07-28 23:28

每天都有新科技出来，无论是创新还是改进我们都应当支持，毕竟这个社会在发展，人类在进步！

dushunli 2017-07-29 00:54

新型突破！

tassy 2017-07-29 00:56

激光器设计无处不在

redplum 2017-07-29 06:24

我来了

likaihit 2017-07-29 06:25

真牛逼啊

canfile 2017-07-29 06:40

激光无处不在

谭健 2017-07-29 07:29

再次关注

hbbofei 2017-07-29 07:52

激光无处不在