8月25日 MIT Prof.Nicholas X. Fang学术报告：Tunable Light-matter Interaction With Quantum Spillover and 2D materials报告题目：Tunable Light-matter Interaction With Quantum Spillover and 2D materials 报告人： Prof. Nicholas X. Fang Department of Mechanical Engineering, Massachusetts Institute of Technology (MIT)， USA 时间：2015年8月25日 星期二 下午 2:30 地点：唐仲英楼 B501 附报告简介： Tunable Light-matter Interaction With Quantum Spillover and 2D materials Nicholas X. Fang Department of Mechanical Engineering, Massachusetts Institute of Technology，77 Massachusetts Ave, Cambridge MA 02139, USA Recently, exciting new physics of plasmonics has inspired a series of key explorations to manipulate, store and control the flow of information and energy at unprecedented dimensions. In this talk I will report our recent efforts on controlling light absorption and emission process through quantum effects in sub-20nm scale coatings. For example, we experimentally demonstrated strong absorption of 20nm thin oxides in the visible spectrum assisted by silver films. We found such a broadband light absorption below the bandgap of the oxide is a manifestation of quantum electron tunneling that penetrate into the thin oxide layer, and it is controlled by the static dielectric constant of the oxide instead of dopant. We also found quantum emitters on a graphene-hBN heterostructure can be switched on and off at mid infrared, by transferring energy into surface phonon polaritons, and this effect can be electrically tuned by biasing the graphene layer. I will also discuss application of these nanostructure for efficient light harvesting and controllable emission, with potential impact in high resolution mid-IR spectroscopy and imaging. |
学术报告 |
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中国 江苏省 南京市鼓楼区金银街15号
电话：+86 25 83592756 传真：+86 25 83595535
