Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source
The scattering-type scanning near-field optical microscope (s-SNOM) has become a powerful imaging and nano-spectroscopy tool, which is widely used in the characterization of electronic and photonic devices, two-dimensional materials and biomolecules. However, in the published literature, nano-spectr...
| Main Authors: | , , , |
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| Format: | Article |
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MDPI AG
2022-02-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/2/97 |
| _version_ | 1827653143011262464 |
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| author | Chen Nan Wang Yue Xia Yang Liu Tao |
| author_facet | Chen Nan Wang Yue Xia Yang Liu Tao |
| author_sort | Chen Nan |
| collection | DOAJ |
| description | The scattering-type scanning near-field optical microscope (s-SNOM) has become a powerful imaging and nano-spectroscopy tool, which is widely used in the characterization of electronic and photonic devices, two-dimensional materials and biomolecules. However, in the published literature, nano-spectroscopy is mainly employed in the mid-infrared band, and the near-infrared (NIR) nano-spectroscopy with broadband spectral range has not been well discussed. In the present paper, we introduce a home-built near-field NIR spectroscopy and imaging set-up that is based on a laser-driven light source (LDLS). By mapping the Ge-Au periodic grating sample and the photonic topology device, a ~30 nm spatial resolution and the excellent capability of characterizing complex samples are demonstrated. Spectra obtained by experiment reveal the optical band-gap of Ge with a spectral resolution of 25 cm<sup>−1</sup>, and a spectral range from 900 to 2000 nm. This technology is expected to provide a novel and unique approach for near-field NIR spectroscopy and imaging. |
| first_indexed | 2024-03-09T21:12:53Z |
| format | Article |
| id | doaj.art-48314585de044576b267f06a45dd1ec9 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T21:12:53Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-48314585de044576b267f06a45dd1ec92023-11-23T21:41:27ZengMDPI AGPhotonics2304-67322022-02-01929710.3390/photonics9020097Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light SourceChen Nan0Wang Yue1Xia Yang2Liu Tao3Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, ChinaInstitute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, ChinaThe scattering-type scanning near-field optical microscope (s-SNOM) has become a powerful imaging and nano-spectroscopy tool, which is widely used in the characterization of electronic and photonic devices, two-dimensional materials and biomolecules. However, in the published literature, nano-spectroscopy is mainly employed in the mid-infrared band, and the near-infrared (NIR) nano-spectroscopy with broadband spectral range has not been well discussed. In the present paper, we introduce a home-built near-field NIR spectroscopy and imaging set-up that is based on a laser-driven light source (LDLS). By mapping the Ge-Au periodic grating sample and the photonic topology device, a ~30 nm spatial resolution and the excellent capability of characterizing complex samples are demonstrated. Spectra obtained by experiment reveal the optical band-gap of Ge with a spectral resolution of 25 cm<sup>−1</sup>, and a spectral range from 900 to 2000 nm. This technology is expected to provide a novel and unique approach for near-field NIR spectroscopy and imaging.https://www.mdpi.com/2304-6732/9/2/97near-field microscopyFourier transform infrared nano-spectroscopys-SNOMlaser-driven light source |
| spellingShingle | Chen Nan Wang Yue Xia Yang Liu Tao Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source Photonics near-field microscopy Fourier transform infrared nano-spectroscopy s-SNOM laser-driven light source |
| title | Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source |
| title_full | Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source |
| title_fullStr | Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source |
| title_full_unstemmed | Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source |
| title_short | Broadband Near-Field Near-Infrared Spectroscopy and Imaging with a Laser-Driven Light Source |
| title_sort | broadband near field near infrared spectroscopy and imaging with a laser driven light source |
| topic | near-field microscopy Fourier transform infrared nano-spectroscopy s-SNOM laser-driven light source |
| url | https://www.mdpi.com/2304-6732/9/2/97 |
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