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Photonic mixer device

A device and photon technology, applied in the field of photonic hybrid devices, can solve the problems of increasing thermal dark current and affecting the use of current measurement methods, and achieve the effect of compact design

Inactive Publication Date: 2005-10-12
PMDTECHNOLOGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Furthermore, the strip readout electrodes used suffer from the disadvantage that they exhibit an increase in thermal dark current because of their diode characteristics, which will affect the use of current measurement methods

Method used

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Embodiment Construction

[0053] figure 1 A top view of a prior art detector element with strip readout electrodes is shown. The two readout electrodes 1' and 2' and the modulation grids 3' and 4' of the detector element can be clearly identified. The photosensitive layer made of silicon, which is not shown in the drawings, is disposed under the gate electrodes 1', 2', 3', and 4'. In actual operation, the readout electrodes 1' and 2' are forward biased with the result that the electrodes or gates can act as potential wells for the charge carriers generated in the photoactive layer. The forward bias voltage is optional because holes have lower mobility and it helps negligible current transport. Reference voltage U ref Applied on the modulating grids 3' and 4', the modulating effect of the modulating grids is the same as that of the incident electromagnetic radiation. The modulation of the electromagnetic radiation and the modulation voltage of the modulation grids 3' and 4' can exhibit a phase offse...

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Abstract

The present invention relates to a photonic mixer device with a photosensitive layer, at least two modulation gates ( 3, 4, 103, 104, 203, 204, 303, 304, 403, 404 ) and at least two readout electrodes ( 1, 2, 101, 102, 201, 202, 301, 302, 401, 402, 501, 502, 601, 602 ) connected to the photosensitive layer, the modulation gates ( 3, 4, 103, 104, 203, 204, 303, 304, 403, 404 ) being able to be connected to a modulation device which raises and lowers the potential of the modulation gates relative to one another and relative to the preferably constant potential of the readout electrodes corresponding to a desired modulation function. In order to further develop the known photonic mixer device such that it shows an increased charge conversion efficiency and reduced dark currents, it is proposed according to the invention that the readout electrodes ( 1, 2, 101, 102, 201, 202, 301, 302, 401, 402, 501, 502, 601, 602 ) in each case have at least two discrete electrode sections ( 1 A- 1 E, 2 A- 2 E) arranged at a distance alongside each other.

Description

(1) Technical field [0001] The invention relates to a photon hybrid device, which comprises a photosensitive layer, at least two modulation grids and at least two readout electrodes connected to the photosensitive layer, the modulation grids are connected to a modulation device, and the modulation device can correspond to The modulation function is required to raise and lower the potential of the modulation gates with respect to each other and preferably a constant potential with respect to the readout electrodes. (2) Background technology [0002] Photonic hybrid devices and methods for recording the amplitude and phase of electromagnetic waves are well known in the prior art, eg as disclosed in DE 198 21 974 A1 patent. The measurement principle well known in the prior art uses an optical detector comprising an optically sensitive layer in which incident photons are caused to generate charge carriers; and two readout electrodes or readout grids pole, making it possible to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/00
CPCG01J9/00G01J2009/006H01L31/02024H01L31/1136G01S17/894
Inventor 许展平T·莫勒H·科拉夫特J·弗雷M·阿尔布雷克特
Owner PMDTECHNOLOGIES
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