From a point of view of classical electrodynamics, the performance of two-dimensional shape-simplified antennaeis discussed based upon the shape of naturally designed systems to harvest light . We explain the reason that the function of the notch at the complex, the function of the PufX presented at the notch, the function of the special pair, the bacteriochlorophylls are dielectric instead of conductor, and a mechanism to prevent damages from excess sunlight. The non-heme iron at the reaction center, the toroidal shape of the light harvestor , the functional role played by the long-lasting spectrometric signal observed, and the photon anti-bunching observed suggest non-reciprocity. Our model has the required structural information automatically built in. We further comment about how our prediction might be verified experimentally{\it  {\it   .
Most of our current understanding of mechanisms of photosynthesis comes from spectroscopy. However, classical definition of radio-antenna can be extended to optical regime to discuss the function of light-harvesting antennae. Further to our previously proposed model of a loop antenna we provide several more physical explanations on considering the non-reciprocal properties of the light harvesters of bacteria. We explained the function of the non-heme iron at the reaction center, and presented reasons for each module of the light harvester being composed of one carotenoid, two short \alpha-helical polypeptides and three bacteriochlorophylls; we explained also the toroidal shape of the light harvester, the upper bound of the characteristic length of the light harvester , the functional role played by the long-lasting spectrometric signal observed, and the photon anti-bunching observed . Based on these analyses, two mechanisms might be used by radiation-durable bacteria,{\it Deinococcus radiodurans ; and the non-reciprocity of an archaeon,{\it Haloquadratum walsbyi , are analyzed. The physical lessons involved are useful for designing artificial light harvesters, optical sensors, wireless power chargers, passive super-Planckian heat radiators, photocatalytic hydrogen generators, and radiation protective cloaks. In particular it can predict what kind of particles should be used to separate sunlight into a photovoltaically and thermally useful range to enhance the efficiency of solar cells .
R
From a point of view of classical electrodynamics, the performance of two-dimensional shape-simplified antennaeis discussed based upon the shape of naturally designed systems to harvest light . We explain the reason that the
Most of our current understanding of mechanisms of photosynthesis comes from spectroscopy. However, classical definition of radio-antenna can be extended to optical regime to discuss the function of light-harvesting antennae. Further to our previously proposed model of a loop antenna we provide several more physical explanations on considering the non-reciprocal properties of the light harvesters of bacteria. We explained the
D
notch at the complex, the function of the PufX presented at the notch, the function of the special pair, the bacteriochlorophylls are dielectric instead of conductor, and a mechanism to prevent damages from excess sunlight. The
R
reaction center, the toroidal shape
reaction center, and presented reasons for each module of the light harvester being composed of one carotenoid, two short \alpha-helical polypeptides and three bacteriochlorophylls; we explained also the toroidal shape of the light harvester, the upper bound of the characteristic length
R
harvestor
harvester
R
suggest non-reciprocity. Our model has the required structural information automatically built in. We further comment about how our prediction might be verified experimentally
. Based on these analyses, two mechanisms might be used by radiation-durable bacteria,
A
Deinococcus radiodurans
A
; and the non-reciprocity of an archaeon,
A
Haloquadratum walsbyi
A
, are analyzed. The physical lessons involved are useful for designing artificial light harvesters, optical sensors, wireless power chargers, passive super-Planckian heat radiators, photocatalytic hydrogen generators, and radiation protective cloaks. In particular it can predict what kind of particles should be used to separate sunlight into a photovoltaically and thermally useful range to enhance the efficiency of solar cells