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Highly tunable ultra-narrow-resonances with optical nano-antenna phased arrays in the infrared | | Shi-Qiang Li
; Wei Zhou
; Peijun Guo
; D. Bruce Buchholz
; Ziwei Qiu
; John B. Ketterson
; Leonidas E. Ocola
; Kazuaki Sakoda
; Robert P. H. Chang
; | | Date: |
14 Nov 2014 | | Abstract: | We report our recent development in pursuing high Quality-Factor (high-Q
factor) plasmonic resonances, with vertically aligned two dimensional (2-D)
periodic nanorod arrays. The 2-D vertically aligned nano-antenna array can have
high-Q resonances varying arbitrarily from near infrared to terahertz regime,
as the antenna resonances of the nanorod are highly tunable through material
properties, the length of the nanorod, and the orthogonal polarization
direction with respect to the lattice surface,. The high-Q in combination with
the small optical mode volume gives a very high Purcell factor, which could
potentially be applied to various enhanced nonlinear photonics or
optoelectronic devices. The ’hot spots’ around the nanorods can be easily
harvested as no index-matching is necessary. The resonances maintain their
high-Q factor with the change of the environmental refractive index, which is
of great interest for molecular sensing. | | Source: | arXiv, 1411.3770 | | Services: | Forum | Review | PDF | Favorites | |
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