Biomedical Engineering Reference
In-Depth Information
and covered concentrically with an ENG nano-shell and its IO
alternative, offer interesting canonical nano-amplifier and nano-
antenna configurations for optical applications. Both plane wave
and EHD excitation examples were discussed. It was illustrated
with power flow streamlines how these resonant electrically small
scatterers physically behave as much larger objects, leading to
smaller gain value requirements. Canonical and quantum dot gain
media examples exemplified how insensitive these DPS-ENG config-
urations are to the actual gain medium choices. It was also shown
how these core-shell configurations can be designed to amplify or
to jam the signal radiated by oneor more quantum emitters.
The nano-amplifier core-shell configurations offer the ability
to enhance significantly the power radiated by a quantum emitter.
These nano-antennas are highly localized and multi-layer designs
offer multi-frequency applications. The jamming configurations
illustrate how active CNPs also can prevent the power radiated by
a quantum emitter from reaching a far-field observer. Thus, these
activeCNPsofferaninterestingroute, forinstance,toenhancingthe
resultsofbiologicalfluorescenceassayswhereselectivelyenhancing
or suppressing the emission of certain emission lines is highly
desirable since these effects would allow one to have the ability
to discriminate between different biological chemicals and entities
simultaneously.
References
1. Engheta, N. and Ziolkowski, R.W. (2006)
Metamaterials: Physics and
Engineering Explorations
(Hoboken, NJ: IEEE Press-Wiley Publishing).
2. Ziolkowski, R.W. (2006). Ultra-thin metamaterial-based laser cavities,
J.
Opt. Soc. Am. B
,
23
, pp. 451-460.
3. Ziolkowski,R.W.andKipple,A.D.(2003).Applicationofdoublenegative
metamaterials to increase the power radiated by electrically small
antennas,
IEEE Trans. Antennas Propagat
.,
51
, pp. 2626-2640.
4. Ziolkowski, R.W. and Kipple, A.D. (2005). Reciprocity between the
effects of resonant scattering and enhanced radiated power by
electrically small antennas in the presence of nested metamaterial
shells,
Phys. Rev. E
.,
72
, 036602.
