Message from Jeff regarding the new session
On Wednesday 16 March we will have the second (of 4) Agora sessions on optical antennas, again trying to get through the Bharadwaj paper. Don’t worry if you haven’t read much further, because I’m hoping we can still concentrate on the basics in sections 3.1 and 3.2 which were not too clear to all of us last time. In particular I’m trying to appreciate equation (10) and the distinction raised between the classical treatment and quantum mechanical result for radiated power, and also his presentation of Re(Z), the antenna’s radiation resistance in equation (11). Maybe we can also cover section 3.3 and equation (14) which deals with the ability of an antenna to extract more energy from a dipole in an excited state by increasing the spontaneous emission rate with the non-radiative rate remaining the same. Then in section 3.4 the other useful aspect of optical antennas, directivity, is quantified, but I don’t expect we’ll get that far this time.
Jeff
