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【物理格致论坛第52期】Efficient light outcoupling enhancemen...

来源:浙江科技学院理学院 | 2019-09-25 | 发布:经管之家


一、题目:Efficient light outcoupling enhancement using hyperbolic dispersion and
asymmetric approach


二、主讲人:Muhammad Imran


三、时间:2019年9月26日(星期四)下午14:00


四、地点:闻理园A4-222




内容摘要:In principle,
type-II hyperbolic metamaterials (HMMs) cannot couple to waves traveling in the
out-of-plane direction due to momentum conservation. Gratings have been
proposed as a means to enhance the outcoupling efficiency, either with a
“bulls-eye” structure or more recently as an array of nanoholes. To mitigate
some of the short-comings of HMMs, we look forward a new method to outcouple
high-k waves along the out-of-plane and propose a new asymmetric hyperbolic
structure to allow for the engineering of outcoupling properties. The effective
response of the entire HMM provide a drastic Purcell enhancement and enhance
the emitter’s spontaneous emission rate. We subsequently investigate that
coupling behavior is associated with the flexible control of the angle of the
dispersion of HMM.




主讲人简介:Muhammad Imran recently completed his doctoral degree from the Institute of Marine Electronics
Engineering and Electromagnetics Academy at Zhejiang University in Hangzhou
China. His current research interests are in the areas of Photonics, Graphene
plasmonics, Hyperbolic metamaterials, and Optoelectronic devices. His research
work has been published in well reputed SCI journals such as, Optics Express,
Optics Communications and Nanoscale. In 2018 he got the title of Excellent
International student of Ocean college, Zhejiang university.





参考文献:


[1]. Paul R. West
et al, Adiabatically Tapered Hyperbolic Metamaterials for dispersion control of
high-k waves, Nano lett. 15, 498 (2015).

[2]. Lorenzo Ferrari et al, Hyperbolic
metamaterials for dispersion-assisted directional light emission, Nanoscale 9, 9034 (2017).


[3]. Muhammad Imran et al, Harnessing
graphene-hBN hyperstructure for single-photon sources, Opt. Express 27,
16461 (2019).




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