Plasmonic near-field nano-imaging and spectroscopy

2004 ◽  
Author(s):  
Satoshi Kawata ◽  
Hiroyuki Watanabe ◽  
Yasushi Inouye
Keyword(s):  
Near Field ◽  
Imaging And Spectroscopy ◽  
Nano Imaging

scholarly journals Terahertz Nano-Imaging with s-SNOM

2021 ◽  
Author(s):  
Matthias M. Wiecha ◽  
Amin Soltani ◽  
Hartmut G. Roskos
Keyword(s):  
Spatial Resolution ◽  
Terahertz Radiation ◽  
Near Field ◽  
Diffraction Limit ◽  
Length Scale ◽  
Field Techniques ◽  
The Poor ◽  
Imaging And Spectroscopy ◽  
Nano Imaging ◽  
Large Wavelength

Spectroscopy and imaging with terahertz radiation propagating in free space suffer from the poor spatial resolution which is a consequence of the comparatively large wavelength of the radiation (300 μm at 1 THz in vacuum) in combination with the Abbe diffraction limit of focusing. A way to overcome this limitation is the application of near-field techniques. In this chapter, we focus on one of them, scattering-type Scanning Near-field Optical Microscopy (s-SNOM) which − due to its versatility − has come to prominence in recent years. This technique enables a spatial resolution on the sub-100-nm length scale independent of the wavelength. We provide an overview of the state-of-the-art of this imaging and spectroscopy modality, and describe a few selected application examples in more detail.

scholarly journals Far-field midinfrared superresolution imaging and spectroscopy of single high aspect ratio gold nanowires

2020 ◽  
Vol 117 (5) ◽  
pp. 2288-2293 ◽  
Author(s):  
Kyle Aleshire ◽  
Ilia M. Pavlovetc ◽  
Robyn Collette ◽  
Xiang-Tian Kong ◽  
Philip D. Rack ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Optical Measurement ◽  
Near Field ◽  
Metal Nanostructures ◽  
Gold Nanowires ◽  
Far Field ◽  
Ambient Conditions ◽  
Fabry Perot ◽  
Imaging And Spectroscopy

Limited approaches exist for imaging and recording spectra of individual nanostructures in the midinfrared region. Here we use infrared photothermal heterodyne imaging (IR-PHI) to interrogate single, high aspect ratio Au nanowires (NWs). Spectra recorded between 2,800 and 4,000 cm−1 for 2.5–3.9-μm-long NWs reveal a series of resonances due to the Fabry–Pérot modes of the NWs. Crucially, IR-PHI images show structure that reflects the spatial distribution of the NW absorption, and allow the resonances to be assigned to the m = 3 and m = 4 Fabry–Pérot modes. This far-field optical measurement has been used to image the mode structure of plasmon resonances in metal nanostructures, and is made possible by the superresolution capabilities of IR-PHI. The linewidths in the NW spectra range from 35 to 75 meV and, in several cases, are significantly below the limiting values predicted by the bulk Au Drude damping parameter. These linewidths imply long dephasing times, and are attributed to reduction in both radiation damping and resistive heating effects in the NWs. Compared to previous imaging studies of NW Fabry–Pérot modes using electron microscopy or near-field optical scanning techniques, IR-PHI experiments are performed under ambient conditions, enabling detailed studies of how the environment affects mid-IR plasmons.

Radially polarized tip-enhanced near-field coherent anti-Stokes Raman scattering microscopy for vibrational nano-imaging

2013 ◽  
Vol 103 (8) ◽  
pp. 083705 ◽  
Author(s):  
Jian Lin ◽  
Kenneth Zi Jian Er ◽  
Wei Zheng ◽  
Zhiwei Huang
Keyword(s):  
Raman Scattering ◽  
Near Field ◽  
Nano Imaging ◽  
Anti Stokes ◽  
Radially Polarized

Nano-imaging for glia-synapse fine structures with a homemade near-field optical microscope

2015 ◽  
Author(s):  
Masaru Sakai ◽  
Youichi Shinozaki ◽  
Keisuke Shibata ◽  
Eiji Shigetomi ◽  
Schuichi Koizumi ◽  
...  
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Fine Structures ◽  
Nano Imaging

Near-Field Imaging and Spectroscopy of Gold Nanoantenna

2015 ◽  
Author(s):  
Deirdre Kilbane ◽  
Anna-Katherina Mahro ◽  
Pascal Melchior ◽  
Stefan Mathias ◽  
Martin Aeschlimann
Keyword(s):  
Near Field ◽  
Near Field Imaging ◽  
Imaging And Spectroscopy ◽  
Field Imaging

Infrared near-field imaging and spectroscopy based on thermal or synchrotron radiation

2014 ◽  
Vol 104 (25) ◽  
pp. 251118 ◽  
Author(s):  
Florian Peragut ◽  
Jean-Blaise Brubach ◽  
Pascale Roy ◽  
Yannick De Wilde
Keyword(s):  
Synchrotron Radiation ◽  
Near Field ◽  
Near Field Imaging ◽  
Imaging And Spectroscopy ◽  
Field Imaging
Sign in / Sign up

Export Citation Format

Share Document