Optical Instruments, Volume. 45, Issue 1, 52(2023)
Super-resolution imaging for ordered gold nanorod arrays
Microscopic techniques cannot resolve subwavelength scale structures due to the diffraction limit of optical imaging systems. Super-resolution imaging of single nanoparticles has been achieved by saturation scattering suppression imaging techniques, but when it comes to ensembles of nanoparticles, the coupling between nanoparticles needs to be considered. Far-field super-resolution optical imaging can be achieved on ordered gold nanorod arrays using a two-beam method beyond the diffraction limit. In this paper, a 5×5 gold nanorod array with an aspect ratio of 2 is designed, the thermal distribution of the gold nanorod array under continuous-wave laser is calculated by the vector light field theory and thermal diffusion theory, and the scattering imaging under dual-beam laser, i.e., pulsed excitation light and continuous-wave suppression light, is simulated. The simulation results show that the continuous-wave laser can effectively suppress the pulsed laser scattering of gold nanorod arrays, and the two-beam approach achieves super-resolution imaging with 80 nm resolution.
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Xihao ZHANG, Qiming ZHANG. Super-resolution imaging for ordered gold nanorod arrays[J]. Optical Instruments, 2023, 45(1): 52
Category: DESIGN AND RESEARCH
Received: Mar. 30, 2022
Accepted: --
Published Online: Mar. 20, 2023
The Author Email: ZHANG Qiming (qimingzhang@usst.edu.cn)