Optical molecular imaging and sensing techniques based on light localization are explored. The creation of locally amplified electromagnetic near-fields on surface plasmon-enhanced metallic nanoarray structures has been investigated in many studies because of the potential for extreme light confinement to improve molecular detection sensitivity and resolving power for imaging processes that would be typically impossible to observe under the diffraction limit. By colocalization of light-matter distribution using plasmonic nanoaperture arrays, it was shown that improvement of detection sensitivity by several orders of magnitude would be plausible. For imaging, although many emerging microscopy approaches have been highly successful to produce super-resolved images beyond imagination, we explore alternative techniques based on plasmonic nanoarrays by which achievable resolution may be customized to fit specific imaging needs.
© 2019 Japan Society of Applied Physics, The Optical Society (OSA)PDF Article