High external-efficiency nanofocusing for lens-free near-field optical nanoscopy
High external-efficiency nanofocusing for lens-free near-field optical nanoscopy
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About this Project
About this Project
With my colleagues from UC Riverside, we develop a novel hybrid NSOM concept (Nature Photonics, 2019), which can be regarded as a combination of the merits from aperture- and apertureless-NSOM. Over all visible wavelength range, it can concentrate more than 50% of the incident light from an optical fiber to the tip of a silver nanowire (tip radius ~ 5 nm), for the study on light-matter interactions such as tip-enhanced Raman scattering (TERS, Wiki). We have demonstrated the first fiber-in-fiber-out lens-free STM-NSOM-TERS by reforming an educational STM apparatus (NaioSTM), with which 1 nm spatial resolution TERS imaging has been proven on a single-walled carbon nanotube sample. We are working on the technique transfer to other NSOM platforms, including Horiba SmartSPM and Nanonics Multiview systems.
With my colleagues from UC Riverside, we develop a novel hybrid NSOM concept (Nature Photonics, 2019), which can be regarded as a combination of the merits from aperture- and apertureless-NSOM. Over all visible wavelength range, it can concentrate more than 50% of the incident light from an optical fiber to the tip of a silver nanowire (tip radius ~ 5 nm), for the study on light-matter interactions such as tip-enhanced Raman scattering (TERS, Wiki). We have demonstrated the first fiber-in-fiber-out lens-free STM-NSOM-TERS by reforming an educational STM apparatus (NaioSTM), with which 1 nm spatial resolution TERS imaging has been proven on a single-walled carbon nanotube sample. We are working on the technique transfer to other NSOM platforms, including Horiba SmartSPM and Nanonics Multiview systems.
Contribution
Contribution
I am one of the major participants in this breakthrough in nano-optics credited as the third author of this article.
I am one of the major participants in this breakthrough in nano-optics credited as the third author of this article.
Read the Full Article: https://www.nature.com/articles/s41566-019-0456-9
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