Abstract
As a kind of two-dimensional metamaterial, metasurfaces can modify the
amplitude, phase, and polarization of the transmitted or reflected
electromagnetic wave, and thereby can be used for enhancing the
light–matter interactions. Based on this notion, an optical magnetic
mirror metasurface featuring periodic nanoscale grooves is designed to
confine the strong electric field near the metal surface by magnetic
responses. As a result, fluorescence from an ultra-thin layer of
fluorescent polymer blend (∼15 nm)
on the mirror surface can be strongly enhanced (by 45-fold in
experiment). The fluorescence emission can be controlled by the
polarization of excitation light since the responses of the magnetic
mirror are polarization sensitive. This kind of magnetic mirror
metasurface is potentially useful in biological monitors, optical
sources, and chemical sensors.
| Original language | English |
|---|---|
| Journal | Optics Letters |
| Volume | 42 |
| Issue number | 21 |
| Pages (from-to) | 4478-4481 |
| ISSN | 0146-9592 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |