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Photodetector

A light detector and light sensor technology, which is applied in the direction of photometry and instruments using electrical radiation detectors, and can solve problems such as small lattice mismatch.

Inactive Publication Date: 2010-08-11
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Strontium Lanthanum Aluminate (SrLaAlO 4 ) materials are insulator materials, due to its crystal structure and high temperature superconductor thin film (HTSC) has a small lattice mismatch, and has excellent chemical stability and low dielectric loss and other advantages, strontium lanthanum aluminate crystal It is considered to be an excellent high-temperature superconductor film substrate material, such as literature [1] R.Brown, V.Pendrick, D.Kalokitis et al., "Low-loss substrate for micro-wave application of high-temperature superconductor films , Appl.Phys.Lett., 1990, 57(13): 1351~1353; literature [2] G.X.Chen, Y.J.Ge, C.Z.Bi et al., "Far-infrared optical properties of SrLaAlO 4 single crystal", Jour.Appl.Phys., 2004, 95(7): 3417-3421. But so far there is no relevant report on the use of strontium lanthanum aluminate materials as photodetectors

Method used

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Examples

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Embodiment 1

[0032] Present embodiment makes strip electrode ultraviolet light detector with reference to Fig. 1, specifically as follows:

[0033] Take a 10mm×5mm strontium lanthanum aluminate single crystal with a surface beveled at 10 degrees and a thickness of 0.5mm as the optical sensor chip 1. The upper surface of 10mm×5mm is used as the incident surface of the light to be detected, and the surface beveled direction is parallel to the 5mm For the edge, the surface-polished crystal is deposited on the 5mm×10mm strontium lanthanum aluminate single crystal by the conventional pulse laser film-making process, and the upper area is 5mm×1mm and the thickness is 500nm. As the first electrode 2 and the second electrode 3, 0.2 mm copper wire is selected as the first electrode lead 4 and the second electrode lead 5, and one end is respectively welded on the first electrode 2 and the second electrode 3, and the other end is respectively connected to a resistor. The two ends of the resistor 6 wi...

Embodiment 2

[0036] In this embodiment, the photodetector is produced according to the structure of Example 1, the difference is that the strontium lanthanum aluminate single wafer with a bevel angle of 45° is used instead of the strontium lanthanum aluminate single wafer with a bevel angle of 10° in Example 1. The photovoltaic signal of the UV photodetector is shown in Fig. 6.

Embodiment 3

[0038]In this embodiment, the photodetector is produced according to the structure of Example 1, the difference is that the strontium lanthanum aluminate single wafer without beveling is used instead of the strontium lanthanum aluminate single wafer with a bevel angle of 10° in Example 1, and the produced ultraviolet light The photovoltaic signal of the detector is shown in Figure 7.

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Abstract

The invention provides a light detector, comprising a light sensor, a first electrode and a second electrode which are connected with the light sensor, and a first electrode lead and a second electrode lead; the ends of the first electrode lead and the second electrode lead are respectively connected with the first electrode and the second electrode and the other ends thereof are used as output terminals; light response material of the light sensor is strontium lanthanum aluminate single wafer, strontium lanthanum aluminate mono-crystalline film or strontium lanthanum aluminate polycrystalline film; the mono-crystalline film or the polycrystalline film is prepared on a substrate. The light detector of the invention can quickly respond to a laser pulse of ns pulse width under the ultraviolet band, with the width of generated voltage pulse of less than 2 ns and full width of pulse of only a plurality of ns.

Description

technical field [0001] The invention relates to a laser detection device, in particular to an ultraviolet light detector. Background technique [0002] The detection of laser energy, power, pulse width, and waveform is not only very important for laser devices and basic research, but also has a very wide range of uses in military, national defense, agriculture, resource mining, transportation, etc. Although people have researched and developed various types of laser detectors such as pyroelectric, photoelectric, and pyroelectric, the exploration of new ultraviolet light detectors is still one of the research hotspots. [0003] Strontium Lanthanum Aluminate (SrLaAlO 4 ) materials are insulator materials, because of its crystal structure and high temperature superconductor thin film (HTSC) has a small lattice mismatch, and has the advantages of excellent chemical stability and low dielectric loss, strontium lanthanum aluminate crystal It is considered to be an excellent high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/42G01J11/00
Inventor 刘昊赵嵩卿周娜赵卉高磊王爱军赵昆
Owner CHINA UNIV OF PETROLEUM (BEIJING)