  Mechanisms to use nanoparticles to separate sunlight into photovoltaic useful
range and thermally useful range to increase the efficiency of solar cells and
to dissipate heat radiatively are discussed based upon lessons we learnt from
photosynthesis. We show that the dual-band maxima in the absorption spectrum of
bacterial light harvestors not only are due to the bacteriochlorophylls
involved but also come from the geometry of the light harvestor. Being able to
manipulate these two bands arbitrarily enables us to fabricate the
nanoparticles required. Such mechanisms are also useful for the design of
remote power charging and light sensors.
