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The Dark Side of Lasers
张晗 2010-3-2 11:45
The Dark Side of Lasers Some scientific discoveries completely change how we look at things: it certainly was the case for Diracs theory on antimatter or Einsteins theory of relativity. Now, our existing scientific ideas are set to change once more; new experiments show t ...
个人分类: 暗孤子|3987 次阅读|3 个评论
Graphene-based long-wave infrared TM surface plasmon modulator
张晗 2010-2-22 14:50
Graphene-based long-wave infrared TM surface plasmon modulator We describe theoretically a new long-wave infrared optical modulator based on the characteristics of TM surface plasmons in graphene. Calculations made using a finite- random phase approximation model, of relevant surf ...
个人分类: 石墨烯|5291 次阅读|没有评论
光畴壁型暗孤子
热度 1 张晗 2010-2-19 12:01
光畴 壁 型暗孤子 由光孤子理论可知,非线性薛定谔方程 会 给出两种孤子解:亮孤子和暗孤子。取决于色散和非线性之间的关系:在正色散,能支持稳定的暗孤子存在;在反常色散区间,能支持稳定的亮孤子。上述结论对于 孤子研究者来说,几乎可以认为是真理了。按照目前的理论和实验发展来看,上述结论还是正确的,虽 ...
个人分类: 暗孤子|9079 次阅读|2 个评论 热度 1
Graphene Mode-Locked Ultrafast Laser
张晗 2010-2-6 20:33
Graphene Mode-Locked Ultrafast Laser ABSTRACT Graphene is at the center of a significant research effort. Near-ballistic transport at room temperature and high mobility make it a potential material for nanoelectronics. Its electronic and mechanical properties are also ideal for micro- and nanom ...
个人分类: 石墨烯|3034 次阅读|没有评论
Graphene mode-lockers for fiber lasers functioned with evanescent field interact
张晗 2010-2-6 20:32
Graphene mode-lockers for fiber lasers functioned with evanescent field interaction Employing graphene as an intracavity passive power modulating element, we demonstrate the efficient laser pulsation in high pulse-energy regime with evanescent field interaction between the propagating light an ...
个人分类: 石墨烯|3056 次阅读|没有评论
Mode locking of Ceramic Nd: YAG with graphene as a saturable absorber
张晗 2010-1-21 16:40
Mode locking of Ceramic Nd: YAG with graphene as a saturable absorber The mode-locking of a ceramic Nd: YAG solid-state laser (SSL) with solution processed graphene as the saturable absorber (SA) was demonstrated. Transform-limited pulses of 4 ps with a ...
个人分类: 石墨烯|3341 次阅读|没有评论
Nature Photonics亮点暗孤子!
张晗 2010-1-14 11:02
暗孤子工作终于得到孤子界重视了 最近的一期nature photonics上面,亮点我们的暗孤子工作。 这份工作可是波折万分,被Optics Letters拖了近半年, 拒了两次,当时感觉只能上optics communications了。幸运的是,PRA很友好的接受了我们的工作。然后又被Nature photonics亮点了,呵呵,算上石墨烯锁模被NPG ...
个人分类: NPG Highlight|8837 次阅读|7 个评论

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