Approaching total absorption at near infrared in a large area monolayer graphene by critical coupling

作者：Liu Yonghao; Chadha Arvinder; Zhao Deyin; Piper Jessica R; Jia Yichen; Shuai Yichen; Menon Laxmy; Yang Hongjun; Ma Zhenqiang; Fan Shanhui; Xia Fengnian; Zhou Weidong^*

来源：Applied Physics Letters, 2014, 105(18): 181105.

DOI：10.1063/1.4901181

We demonstrate experimentally close to total absorption in monolayer graphene based on critical coupling with guided resonances in transfer printed photonic crystal Fano resonance filters at near infrared. Measured peak absorptions of 35% and 85% were obtained from cavity coupled monolayer graphene for the structures without and with back reflectors, respectively. These measured values agree very well with the theoretical values predicted with the coupled mode theory based critical coupling design. Such strong light-matter interactions can lead to extremely compact and high performance photonic devices based on large area monolayer graphene and other two-dimensional materials.

• 出版日期2014-11-3