Accession Number : AD1026832


Title :   Investigation of the Emissivity and Suitability of a Carbon Thin Film for Terahertz Absorbers


Descriptive Note : Technical Report


Corporate Author : Naval Postgraduate School Monterey United States


Personal Author(s) : Sullivan,Naomi C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1026832.pdf


Report Date : 01 Jun 2016


Pagination or Media Count : 73


Abstract : The main goal of this work is to optimize the emissivity of terahertz (THz) thermal sensors by deposition of a carbon thin film. Previously, these thermal sensors were designed to detect THz radiation utilizing metamaterials in a complicated optical probing scheme. We have repurposed them to absorb terahertz radiation, convert the radiation to heat, and convey that surface temperature as an infrared image, essentially mapping the terahertz domain. This design has the potential to be used for optical applications such as an attachable lens that would convert any IR (infrared) camera into a THz camera. Additionally, by using this technique, we show that carbon thin films produce sufficient spectral emissivity for IR-based readout. We ascertained that to deposit a carbon thin film an iron catalyst is needed; pure aluminum cannot be used as a catalyst for chemical vapor deposition (CVD) of carbon. Overall, this study provides a viable method to fabricate thin carbon films at low temperatures for IR-based readout.


Descriptors :   microelectromechanical systems , thin films , etching , terahertz radiation , metamaterial absorbers , detectors


Subject Categories : Electrical and Electronic Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE