We study terahertz transmission through nano-patterned vanadium dioxide thin film. It is found that the patterning allows the lowering of the apparent transition temperature. For the case of the smallest width nano antennas, the transition temperature is lower by as many as ten degrees relative to the bare film, so that the nano patterned hysteresis curves completely separate themselves from their bare film counterparts. This early transition comes from the one order of magnitude enhanced effective dielectric constants by nano antennas. This phenomenon opens up the possibility of transition temperature engineering.
@article{arxiv.1208.3269,
title = {Terahertz nano antenna enabled early transition in VO2},
author = {Young-Gyun Jeong and Ji-Soo Kyoung and Jae-Wook Choi and Sang-Hoon Han and Hyeong-Ryeol Park and Namkyoo Park and Bong-Jun Kim and Hyun-Tak Kim and Dai-Sik Kim},
journal= {arXiv preprint arXiv:1208.3269},
year = {2012}
}