Helical Metamaterials

In the summer of 2021, I was awarded a Summer Undergraduate Research Fellowship (SURF) to work with Professor Daraio in the Mechanics and Materials by Design Lab. In this project, I performed numerical simulations to characterize the dynamic properties of helical-type acoustic metamaterials. I found that inducing non-centrosymmetry in the structure allowed for more control over the degree of mode coupling at low frequencies and the size of the longitudinal bandgap. Through this research experience, I learned how to use the commercial finite element analysis software COMSOL Multiphysics to perform my numerical simulations and gained a lot of knowledge about mechanical metamaterials and wave propagation properties. I continued to work on this project into the 2021-2022 academic year with my graduate student mentor Gunho Kim to experimentally validate our numerical results. 

We compiled our findings into a research paper, which was accepted in the AIP journal Applied Physics Letters (APL) on July 1, 2022. The paper was selected to be a feature article and the cover for APL's August 15th, 2022 issue. 


Kim, G., Coimbra K.M.Y., and Daraio, C., "Mode hybridization in helical metamaterials with variable centro-asymmetry," Applied Physics Letters, (accepted, 2022).

In this paper, we study the dispersion properties of novel helical acoustic metamaterials. This research topic started as my SURF project, which evolved into a research paper for the AIP journal Applied Physics Letters

Cover for the August 15th, 2022 issue of Applied Physics Letters

My figure and paper were featured as the cover of the August 15th, 2022 issue.


SURF Presentation

Here are my presentation slides that I presented to the SURF committee at the end of my fellowship in August 2021. 

SURF Presentation Video

Here is the corresponding presentation video that I submitted to the SURF committee in August 2021.