Metamaterials with low loss and gain
28 Jan 2010 | Online Presentations | Contributor(s): Mikhail A. Noginov
Optical loss caused by absorption in metal and a need for active control are among the major challenges of plasmonic metamaterials. Both can be addressed by utilizing optical gain. Recent efforts aimed at the reduction of loss and the stimulated emission in nanoplasmonic systems with gain will be discussed.
Many plasmonic systems would benefit even more from loss reduction techniques, which do not require optical gain. Several prospective gain-less solutions of the loss problem, including ...
Conquering Surface Plasmon Resonance Loss in Metallic Nanostructures
16 Oct 2007 | Online Presentations | Contributor(s): Mikhail A. Noginov
We have observed the compensation of loss in metal by gain in
dielectric in the mixture of Ag aggregate and rhodamine 6G dye. The
demonstrated six-fold enhancement of the Rayleigh scattering is the
evidence of the enhancement of the localized surface plasmon (SP)
resonance. In the attenuated total internal reflection setup, we
have demonstrated ~30% elongation of the SP propagation length and
shown that the full compensation of loss of propagating SP by optical
gain is within the reach. These experimental observations pave the
road to many applications of nanoplasmonics and metamaterials.
19 May 2006 | Online Presentations | Contributor(s): Mikhail A. Noginov
Random lasers are the simplest sources of stimulated
emission without cavity, with the feedback provided by
scattering in a gain medium. First proposed in the late
60’s, random lasers have grown to a large research field.
This lecture reviews the state of the art of random lasers,
provides an outline of the basic models describing their
behavior, and describes the recent advances in the field.
Researchers and students entering the field of random
lasers will find in the lecture an overview of the field of