Hi Lumerical,<\/p>\n
<\/p>\n
I am Yuzi Song, a PhD student at Research school of Physics in Australia National University.<\/p>\n
<\/p>\n
I am writing to ask you about simulating the optical properties of nanowire LED by using 1 dipole <\/span>or multiple dipoles.<\/p>\n <\/p>\n I read lots of literatures and the model provided by FDTD, in which people usually use<\/p>\n <\/span>(1)1dipole <\/span>and do not get the average data or (for example, <\/span>Large enhancement of light extraction efficiency in AlGaN-based nanorod ultraviolet light-emitting diode structures | Discover Nano (springer.com)<\/span><\/a>)<\/span><\/p>\n (2)1dipole <\/span>and sweep different position and get the average value( for example, <\/span>Micro-LED – Ansys Optics<\/span><\/a> or,<\/span>Optical properties of plasmonic light-emitting diodes based on flip-chip III-nitride core-shell nanowires<\/span><\/a>)<\/span><\/p>\n (3) random multiple dipoles (we are exploring this way)<\/p>\n <\/p>\n My question is<\/p>\n (1) As dipoles in different position have impact on Purcell factor, light extraction efficiency, <\/span>is the first method above wrong?<\/p>\n (2) although the second method use “sweep” to include the impact from position and then get the average value from all of the simulations, but it is still use only one dipole in 1 simulation. Considering the mechanism of core-shell nanowire LED, it is the whole active layer emits lights, so is it right to only use 1 dipole in active layer?<\/p>\n (3) I am currently considering the third way, in which we set random dipoles in the active layer. But I also find that people think “Multiple dipole sources are intrinsically suited for the simulation of active layer in 3D FDTD method. However, the use of multiple dipole sources leads to non-physical interference pattern.”(from <\/span><\/span>Frustrated total internal reflection in organic light-emitting diodes employing sphere cavity embedded in polystyrene (iop.org)<\/span><\/a>)<\/span><\/p>\n Is there any way to reduce or remove the influence of those “non-physical interference pattern”?<\/p>\n <\/p>\n Best regards,<\/p>\n Yuzi<\/p>\n","protected":false},"template":"","class_list":["post-311550","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t