Low-index light concentrators for infra-red focal plane array applications


  1. Laou, P.
  2. Eleftheriades, G.V.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Electrical and Computer Engineering
This report addresses issues arising in Infra-red Focal Plane Arrays (IRFPA), where light that is focused at the Focal Plane Array (FPA) is lost in between the pixel sensors. To achieve this, a layer of novel light concentrating devices made of low-index anisotropic metamaterials are introduced and utilized. The devices can collect the light falling in between the sensors of a FPA and concentrate them onto the corresponding pixel sensor thus increasing the signal-to-noise ratio (SNR). The devices have the remarkable ability to concentrate power at extremely short distances from them, hence introducing minimal additional thickness to the FPA. Two main types of low-index metamaterials are utilized, namely plasmonic multilayer Epsilon-Near-Zero (ENZ), and all dielectric Zero-Index Metamaterials (ZIM) based on a Photonic Crystal. The designs are primarily targeted for Infrared wavelengths in the range of 5 µm to 2.5 µm. Potential fabrication methods are also discussed and possible variations are presented that may prove to ease the fabrication of the devices. Designs at various wavelengths and using different materials are considered. The benefits and effects of introducing the MTM light concentration layer is analysed through simulations.
metamaterials;focal plane arrays
Report Number
DRDC-RDDC-2014-C239 — Contract Report
Date of publication
01 Aug 2014
Number of Pages
Electronic Document(PDF)

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