TY - GEN
T1 - Metamaterials to bridge propagating waves with surface waves and control electromagnetic waves
AU - He, Qiong
AU - Sun, Shulin
AU - Xiao, Shiyi
AU - Li, Xin
AU - Tsai, Din Ping
AU - Zhou, Lei
PY - 2013/9
Y1 - 2013/9
N2 - In this work, we demonstrate theoretically and experimentally that a specific gradient-index meta-surface can convert a PW to a SW with nearly 100% efficiency. Distinct from conventional devices such as prism or grating couplers, the momentum mismatch between PW and SW is compensated by the reflection-phase gradient of the meta-surface, and a nearly perfect PW-SW conversion can happen for any incidence angle larger than a critical value. Experiments in the microwave region, including both far-field and near-field characterizations, are in excellent agreement with full-wave simulations. Based on gradient metasurface's idea, we also realized a gradient meta-surface supporting high-efficiency anomalous reflection for near-infrared light and a flat focusing lens for microwave.
AB - In this work, we demonstrate theoretically and experimentally that a specific gradient-index meta-surface can convert a PW to a SW with nearly 100% efficiency. Distinct from conventional devices such as prism or grating couplers, the momentum mismatch between PW and SW is compensated by the reflection-phase gradient of the meta-surface, and a nearly perfect PW-SW conversion can happen for any incidence angle larger than a critical value. Experiments in the microwave region, including both far-field and near-field characterizations, are in excellent agreement with full-wave simulations. Based on gradient metasurface's idea, we also realized a gradient meta-surface supporting high-efficiency anomalous reflection for near-infrared light and a flat focusing lens for microwave.
UR - https://www.scopus.com/pages/publications/84888362925
U2 - 10.1109/ICEAA.2013.6632470
DO - 10.1109/ICEAA.2013.6632470
M3 - Conference article published in proceeding or book
AN - SCOPUS:84888362925
SN - 9781467357074
T3 - Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013
SP - 1347
EP - 1348
BT - Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013
T2 - 2013 15th International Conference on Electromagnetics in Advanced Applications, ICEAA 2013
Y2 - 9 September 2013 through 13 September 2013
ER -