We report on the feedback-optimized extraordinary optical transmission of continuous-variable entangled states through a hexagonal metal-hole array. The continuous-variable entanglements from a nondegenerate optical parametric amplifier are first demonstrated to survive after a photon-plasmon-photon conversion process. By controlling the reflected light from the metal-hole array, a significant enhancement of quantum correlations has then been experimentally achieved comparing to the case of without such coherent feedback control. This result presents a useful technique to efficiently recover the substantial reflective losses in the plasmonic circuits for quantum information processing.
@article{arxiv.1412.4885,
title = {Feedback-optimized Extraordinary Optical Transmission of Continuous-variable Entangled States},
author = {Dong Wang and Chuanqing Xia and Qianjin Wang and Yang Wu and Fang Liu and Yong Zhang and Min Xiao},
journal= {arXiv preprint arXiv:1412.4885},
year = {2015}
}