Questions and Answers

0 Like 0 Dislike

Rithesh Raj

different aspect ratio gold rods showing almost same extiction in simulation

I have tried to simulate gold rods with length 578,641 and 735 nm and diameter 85 nm for all. but I got almost same extinction spectrum for all three cases. but as per literature it should not come  like that. I simulated from 450 to 1800 nm

Report abuse

1 Responses

  1. 0 Like 0 Dislike

    Prashant K Jain

    The Au rod dimensions provided in the question suggest that the rods are much larger than typical. For sizes approaching the wavelength of light radiative damping and electromagnetic retardation dominate the spectrum, leading to broadband extinction. Moreover the absorption resonances, if any, will not appear in the NIR region. So, it is going to difficult to see any effect of the aspect ratio. I suggest rerunning the calculations with 10x smaller targets.

    Reply Report abuse

    Please login to answer the question.