Thermally switchable metamaterial absorber with a VO2 ground plane

被引：62

作者：

Naorem, Rameshwari ^{[1
]}

Dayal, Govind ^{[1
]}

Ramakrishna, S. Anantha ^{[1
]}

Rajeswaran, Bharathi ^{[2
]}

Umarji, A. M. ^{[2
]}

机构：

[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India

来源：

OPTICS COMMUNICATIONS | 2015年 / 346卷

关键词：

Tunable metamaterial; Phase change material; Switching; OPTICAL-PROPERTIES; THIN-FILMS;

D O I：

10.1016/j.optcom.2015.01.075

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A tri-layer metamaterial absorber, composed of a metal structure/dielectric spacer/vanadium dioxide (VO2) ground plane, is shown to switch reversibly between reflective and absorptive states as a function of temperature. The VO2 film, which changes its conductivity by four orders of magnitude across a insulator-metal transition at about 68 degrees C, enables the switching by forming a resonant absorptive structure at high temperatures while being inactive at low temperatures. The fabricated metamaterial shows a modulation of the reflectivity levels of 58% at a frequency of 22.5 THz and 57% at a frequency of 34.5 THz. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：154 / 157

页数：4

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