Midinfrared resonant magnetic nanostructures exhibiting a negative permeability.
We experimentally demonstrate the first midinfrared (mid-IR) resonant magnetic nanostructures exhibiting a strong magnetic response corresponding to a negative permeability. This result is an important step toward the achievement of a negative refractive index in the IR. The possibility of extending negative permeability to higher frequencies is discussed; a structure with a negative effective permeability at a near-IR resonance frequency of 230 THz (1.3 microm) is proposed.
Zhang
Shuang
S
Center for High Technology Materials, University of New Mexico, Albuquerque, NM 87106, USA.
Fan
Wenjun
W
Minhas
B K
BK
Frauenglass
Andrew
A
Malloy
K J
KJ
Brueck
S R J
SR