Terahertz spectral analysis device and detection method for biofilm

A biological thin film and spectral analysis technology, applied in the field of terahertz band spectral analysis devices, can solve problems such as difficult analysis of biological samples, and achieve the effects of wide measurement spectral range and simple structure

Inactive Publication Date: 2011-06-08
NANJING FANGYUAN GLOBAL DISPLAY TECH
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Problems solved by technology

But it is difficult to analyze very thin biological samples with this method

Method used

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  • Terahertz spectral analysis device and detection method for biofilm
  • Terahertz spectral analysis device and detection method for biofilm
  • Terahertz spectral analysis device and detection method for biofilm

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Embodiment Construction

[0025] The basic structure of the biofilm terahertz spectroscopic analysis device of the present invention includes a semiconductor wafer whose plasma frequency is slightly higher than the maximum frequency of the transmitted terahertz wave, two blades placed in parallel, a terahertz wave source and a terahertz time-domain spectrometer. The frequency of terahertz waves is lower than the plasma frequency of semiconductor crystals. The two blades are perpendicular to the semiconductor wafer, the distance between the edge of the two blades and the upper surface of the semiconductor wafer is less than the attenuation distance of the maximum frequency terahertz surface plasma wave in the external gas, and the distance between the two blades is less than the maximum frequency terahertz surface plasma wave. Hertz surface plasmon wave propagation distance on the semiconductor surface. The thickness of the semiconductor wafer is greater than the attenuation distance of the minimum freq...

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Abstract

The invention discloses a terahertz spectral analysis device and a terahertz spectral analysis method for a biofilm, and relates to a device for performing terahertz wave band spectral analysis on the biofilm and a method for performing terahertz wave band spectral detection on the biofilm by using terahertz surface plasma waves. The terahertz spectral analysis device for the biofilm comprises a semiconductor chip (3), two blades (2) placed in parallel, a terahertz wave source (11) and a terahertz time domain spectrograph (6); the two blades are vertical to the semiconductor chip (3); the distances between knife edges of the two blades (2) and the upper surface of the semiconductor chip (3) is smaller than an attenuation distance of the terahertz surface plasma wave (4) with the largest frequency in the air; and the distance between the two blades is smaller than the transmission distance of the terahertz surface plasma wave with the largest frequency on the surface of a semiconductor. The sensitivity and the signal to noise ratio of the spectral analysis device are improved by using strong electric-field strength of the terahertz surface plasma wave in a small space on the surface of the semiconductor.

Description

technical field [0001] The invention relates to a device for performing terahertz band spectrum analysis on biological films, and a method for performing terahertz band spectrum detection on biological films by using terahertz surface plasma waves. Background technique [0002] Terahertz waves generally refer to electromagnetic waves with a frequency range between 0.1THz and 10THz, and its wave band is between far infrared and microwave. For a long time, spectroscopic studies of biomolecules have been carried out in the frequency range above 10 THz, and detailed information on molecular structures and properties are usually obtained from Raman and near-infrared spectroscopy. In recent years, the development of terahertz wave sources has made a breakthrough in terahertz spectroscopy technology, and the application research of terahertz waves has attracted more and more attention. [1] . The transitions between vibrational energy levels and rotational energy levels of many po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 杨涛何浩培仪明东黄维李兴鳌
Owner NANJING FANGYUAN GLOBAL DISPLAY TECH
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