< BK21 플러스 BEST 정보기술 사업단 세미나 개최 안내 >

개최일시 : 2016년 09월 27일 화요일 16:00 ~ 17:00

개최장소 : 공학원 379C호 

세미나 제목 : Graphene based adaptive surfaces: from visible to microwave

발표초록 : 

In nature, adaptive coloration has been used for concealment and signaling. Various biological mechanisms have evolved to tune the reflectivity of visible and ultraviolet light. In modern technology, however, there are limited number of active materials that can be used to develop surfaces with reconfigurable reflectance and transmittance in a very broad spectral window. Graphene provides new perspective for “smart” surfaces which can enable new technologies such as active radar shields to conceal objects from radar detection or flexible display devices for optical camouflage. The ability to control interaction of electromagnetic waves with matter forms the heart of these emerging applications. 

In this talk, I will summarize our recent work on graphene based adaptive surfaces operating in a very broad spectrum covering from the visible to microwave. Our method relies on electro-modulation of interband and intraband electronic transition of large area single and multilayer graphene in various device architectures. Based on this principle, we developed new class of adaptive surfaces capable of real time electrical-control of its appearance (Figure 1). I will also talk about integration of possible feedback systems which allow us to realize adaptive camouflage systems that can sense the time-varying background and change the appearance to bend itself in the background.

강연자 : Coskun Kocabas, Assistant Professor / Bilkent University, Department of Physics, Ankara, Turkey

초청자 : 전기전자공학과 교수 안종현