Meet the Team
3.042 Home Page
metamaterials at mit.edu
The purpose of our project is to investigate lithography as a
technique for fabricating nanoscale periodic structures that can be
used as metamaterials. Metamaterials are defined as materials that
obtain several of their properties via their structure, rather than by
the intrinsic properties of their constituent components.
Metamaterials have attracted attention for their photonic and phononic
properties, and have been studied for potential use in invisibility
Project deliverables will include physical 2D and 3D periodic
structures fabricated using 3D printing and
lithography techniques. We will be using the 3D printer to make
macroscale models of our periodic structures. We will then use 1D
masks to create 2D periodic structures on the order of 2-20 microns
thick. We will then use these 2D structures as molds to make a
variety of PDMS phase masks. The phase masks can then be placed in
contact with a photoresist film to diffract laser beams, creating a 3D
multibeam interference pattern that would lead to 3D periodic
structures. For the 3D structures, we will investigate thick resist
layers exceeding 50 microns. We may also investigate infiltration of
the structures via a sol gel process to create 3D periodic structures
made of materials other than photoresist polymer.
After fabricating our structures, we will image them using the
scanning electron microscope (SEM) and then test for photonic,
phononic, and mechanical properties using methods such as spectroscopy.
From the tested properties, we will derive possible applications of
our metamaterials, which could include use as photonic crystals,
phononic crystals, and/or microtrusses.