論文

査読有り 責任著者
2017年7月

Increase of the emission of laser-produced plasmas under N-2 gas atmosphere in the 2.9-6 nm region

APPLIED PHYSICS LETTERS
  • Masataka Kado
  • ,
  • Maki Kishimoto
  • ,
  • Kunio Shinohara
  • ,
  • Takeo Ejima

111
5
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1063/1.4996890
出版者・発行元
AMER INST PHYSICS

The wavelength region between the K-edges of carbon and oxygen is termed as the water window (lambda = 2.3-4.5 nm) and is considered to be suitable for the observation of nanometer-scale structures composed of light elements in an aqueous solution because of both the short wavelength and transparency of the light. The nanometer-scale structures in an aqueous solution fluctuate owing to Brownian motion. Therefore, the observation of the nanometer-scale structures can be achieved by one-shot exposure of the light in the water window. To observe the nanometer-scale structures by the one-shot exposure, the light source of the microscope working in the water window should exhibit a high light-flux. One of the light sources used for the one-shot exposure is the laser-produced plasma (LPP) light source. The conversion efficiency of the LPP light source in the water window is 1% or less. Therefore, a high intensity laser or improvement of the conversion efficiency is required for the one-shot observation. In this study, an emission-intensity increase in the LPP light source is observed in the wavelength region from 2.9 nm to 6 nm under a N-2 gas atmosphere. The intensity value, calibrated by the gas absorbance, was increased up to 5 times in proportion to the N-2 pressure, which was increased from 0 Pa to 400 Pa. Experimental conditions demonstrate that the conversion efficiency of the LPP light source is improved by the introduction of gas. Published by AIP Publishing.

リンク情報
DOI
https://doi.org/10.1063/1.4996890
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000406782300029&DestApp=WOS_CPL
ID情報
  • DOI : 10.1063/1.4996890
  • ISSN : 0003-6951
  • eISSN : 1077-3118
  • Web of Science ID : WOS:000406782300029

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