| Popis: |
Performance in several photonics applications such as detection, sensing, light emission and non-linearity enhancement can be substantially improved by electric field enhancement and efficient light funneling into deep subwavelength channels. Phenomena such as structural surface plasmon resonance and extraordinary optical transmission are typically utilized to achieve this. The resonant nature of the phenomenon makes it inherently narrowband restricting its application. Broadband electric field enhancement over a large wavelength range in the mid-infrared (~ 2 – 10 micron) is possible using a double-grooved metallic structure [1] as it operates nonresonantly. We will describe fabrication of the double-groove structure and its optical response when absorptive materials are introduced. The effect of broadband electric field enhancement in the optical response will be discussed.Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. The views expressed in the article do not necessarily represent the views of the U.S. Department of Energy or the United States Government. |
