Far-infrared detector and near-field microscope

A detector and far-infrared technology, applied in the field of detectors, can solve the problems of large dark current and the inability to detect weak terahertz signals, and achieve the effects of low noise equivalent power, improved detection efficiency, and simplified detection process

Active Publication Date: 2020-09-01
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In comparison, terahertz photodetectors using photoelectric detection have the characteristics of fast response speed and high detection sensitivity, but the dark current of traditional terahertz photodetectors is large, which makes it impossible to detect weak terahertz signals.

Method used

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  • Far-infrared detector and near-field microscope

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0038] The embodiment of the present application provides a far-infrared detector, such as figure 1 , figure 2 , image 3 and Figure 4 Shown, described far-infrared detector comprises:

[0039] Needle-like structure 10;

[0040] Graphene quantum dots 20 positioned on the side or bottom surface of the needle-like structure 10; The distance between the bottom surfaces of 10 is less than or equal to the preset distance;

[0041] Two graphene electrodes 30 connected symmetricall...

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Abstract

The application discloses a far-infrared detector and a near-field microscope. The far-infrared detector adopts a graphene quantum dot as a detection element, and the graphene quantum dot has the beneficial characteristics of wide frequency spectrum light absorption, high electrical thermal conductivity, low electron-phonon coupling and the like, and can efficiently detect terahertz signals. In addition, the far-infrared detector places the graphene quantum dot on the bottom surface with a pinpoint-shaped structure or the side surface close to the bottom surface; the detection efficiency of the graphene quantum dot is greatly improved; the far-infrared detector can be used for detecting extremely weak terahertz signals, and is even expected to realize detection of terahertz single photons;and the sizes of the whole far-infrared detector and a near-field microscope can be greatly reduced, so that the near-field microscope with the far-infrared detector can be placed in a very narrow space (such as a low-temperature high-intensity magnetic field environment). And finally, the far-infrared detector only needs to fix the pinpoint-shaped structure in the using process, so that the detection process of terahertz signals is simplified.

Description

technical field [0001] The present application relates to the technical field of detectors, and more specifically, to a needlepoint far-infrared detector and a near-field microscope. Background technique [0002] Terahertz waves refer to electronic waves with a frequency of 0.1-10THz, which are connected between the infrared band and the microwave band on the electromagnetic spectrum, and are called far-infrared waves. [0003] Due to the many excellent properties of terahertz waves, such as good penetration, wide spectral coverage, picosecond-level transients, and low ionization characteristics, terahertz technology provides a great opportunity for people to characterize and micromanipulate matter. It has great theoretical and technical support, and has great achievements in the fields of high spatial and temporal resolution detection and imaging, large capacity and high security medium and short distance communication, radio astronomy detection, atmospheric and environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01Q60/18G01J1/42G01N21/3581H01L31/028H01L31/0352H01L31/09
CPCG01Q60/18G01N21/3581G01J1/42H01L31/035218H01L31/028H01L31/09
Inventor 向奎王纪浩黄秋萍陆轻铀陆亚林
Owner UNIV OF SCI & TECH OF CHINA
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