Various shapes other than spherical (nanorods, nanocages, nanoshells, etc.) can be used to achieve a wide tunability of the plasmon resonance. This is much desired for biomedical applications when the resonance is tuned to the so-called biological transparency window in NIR. Depending on a particular shape parameters like the aspect ratio (length/diameter), wall thickness or thickness of the shell can be varied for shifting the resonance either way.
Dear Tahereb,
You can have a look to this reference
http://www.hindawi.com/journals/jnm/2012/759830/
the Mie scattering ( solution of the Maxwell solution ) can be extended for prolate and oblate nanoparticles .
Hope it will help you !
Greetings
Eric
Dear Tahereb,
Look as well to this reference:
http://ac.els-cdn.com/S0022407314000247/1-s2.0-S0022407314000247-main.pdf?_tid=82b4b762-e5a2-11e3-8a62-00000aacb35e&acdnat=1401197369_3021c31c5dc57d939c32c31a37e54e84
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