Micro-electro-mechanically switchable near infrared complementary metamaterial absorber

We experimentally demonstrate a micro-electro-mechanically switchable near infrared complementary metamaterial absorber by integrating the metamaterial layer to be the out of plane movable microactuator. The metamaterial layer is electrostatically actuated by applying voltage across the suspended co...

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Bibliographic Details
Published in:Applied physics letters 2014-05, Vol.104 (20)
Main Authors: Pitchappa, Prakash, Pei Ho, Chong, Kropelnicki, Piotr, Singh, Navab, Kwong, Dim-Lee, Lee, Chengkuo
Format: Article
Language:English
Subjects:
Absorbers (materials)
ABSORPTION
Applied physics
Blue shift
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC POTENTIAL
FILTERS
INFRARED RADIATION
LAYERS
METALS
Metamaterials
Microactuators
Modulators
Near infrared radiation
Photonics
Product development
SPECTRAL SHIFT
Star maps
SWITCHES
Switching
Tunable filters
WAVELENGTHS
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Summary:We experimentally demonstrate a micro-electro-mechanically switchable near infrared complementary metamaterial absorber by integrating the metamaterial layer to be the out of plane movable microactuator. The metamaterial layer is electrostatically actuated by applying voltage across the suspended complementary metamaterial layer and the stationary bottom metallic reflector. Thus, the effective spacing between the metamaterial layer and bottom metal reflector is varied as a function of applied voltage. With the reduction of effective spacing between the metamaterial and reflector layers, a strong spectral blue shift in the peak absorption wavelength can be achieved. With spacing change of 300 nm, the spectral shift of 0.7 μm in peak absorption wavelength was obtained for near infrared spectral region. The electro-optic switching performance of the device was characterized, and a striking switching contrast of 1500% was achieved at 2.1 μm. The reported micro-electro-mechanically tunable complementary metamaterial absorber device can potentially enable a wide range of high performance electro-optical devices, such as continuously tunable filters, modulators, and electro-optic switches that form the key components to facilitate future photonic circuit applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4879284