Preparing laser detector in quick responding and broadband by using material of oxide film in multi layers

Abstract

A fast response broadband laser detector prepared by material of oxide multiplayer film consists of chip formed by epitaxial growth of doped oxide and optical response material on one surface of oxide single crystal substrate , doped barium titanate or doped strontium titanate using doped oxide as epitaxial growth on said substrate , optical response layer formed by doped lanthanum manganate film layer , the first electrode on doped lanthanum manganate film , the second electrode on doped oxide and two electrode lead wires with one end being connected to two electrodes and another end to signal output end .

Description

technical field [0001] The invention relates to a laser detector, in particular to a fast-response broadband laser detector made of oxide multilayer film material. Background technique [0002] The detection of laser energy, power, pulse width and waveform is not only very important for laser devices and scientific research, but also has a very wide range of applications in military, national defense, production and life. Although people have developed many different types of laser detectors such as pyroelectricity, photoelectricity, pyroelectricity, etc., the work for novel laser detectors is still people's interest and ongoing work, and the applicant is also in this regard Obtained the following patents for laser detectors, such as patent number: ZL89202869.6; patent number: ZL89220541.5; patent number: ZL90202337.3, patent number: ZL90205920.3; Made of electrical materials, the photoresponse of the detector is not fast enough, and the response band is not wide enough. ...

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Problems solved by technology

Although people have developed many different types of laser detectors such as pyroelectricity, photoelectricity, pyroelectricity, etc., the work for novel laser detectors is still people's interest and ongoing work, and the applicant is also in this regard Obtained the following patents for laser detectors, such as patent number: ZL89202869.6; patent number: ZL89220541.5; patent number: ZL90202337.3, patent number: ZL90205920.3; The photoresponse of the detector is not fast enough, and the response band is not wide enough.

[0003] People have done a lot of research on the magnetoresistance properties of doped lanthanum manganate materials, and recently people have also observed the photoelectric properties of doped lanthanum manganate films (such as literature 1, Time dependence of laser-inducedthermoelectric voltages in La 1-x Ca x MnO 3 and YBa 2 Cu 3 o 7-δ thin films, P.X.Zhang et al., Appl.Phys.Lett., Vol.84, No.21, 4026(2002)), but the pulse width of its photoresponse is on the order of ms, so it cannot be used to detect and measure laser pulses Pulse laser waveform with width less than ms

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