Enhanced Transmission of Higher Order Plasmon Modes With Random Au Nanoparticles in Periodic Hole Arrays

Yu-Cheng Chen, Yi-Tsung Chang, Hung-Hsin Chen, Fang-Tzu Chuang, Che-Hsuan Cheng, Si-Chen Lee
2013 IEEE Photonics Technology Letters  
The enhanced transmission of higher order plasmon modes with random gold nanoparticles embedded in periodic hole arrays using asymmetric pair aperture as a unit is investigated in the midinfrared regime. Different thicknesses of gold film were deposited inside holes and then annealed to form randomly sized and distributed nanoparticles. The holes deposited with thin gold film exhibit significantly enhanced transmission in higher order modes after thermal annealing. The enormous local electric
more » ... us local electric field around the nanoparticles enhances the scattering effect that contributes to the enhanced infrared transmission. This unique design, which integrates localized and propagating surface plasmons, provides an easy way for midinfrared applications in need of enhanced transmission in higher order modes.
doi:10.1109/lpt.2012.2227698 fatcat:gewwuq4pmffpzgdwvbnlp6x5n4