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Structure reducing micro cavity thermal-optical bistable state power threshold via photoresistance feedback

A photoresistor and microcavity thermo-optic technology, applied in the direction of optical bistable devices, optics, etc., can solve the problems of photonic crystal size error, limited practical application, and inability to stabilize mass production, etc., to reduce the threshold value and reduce system adjustment Power consumption, enhancing the effect of thermo-optical nonlinearity

Inactive Publication Date: 2015-10-21
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, limited by the current process precision requirements, there is a certain error between the actual size and design of the photonic crystal prepared, so it cannot be stably mass-produced, which limits its practical application

Method used

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  • Structure reducing micro cavity thermal-optical bistable state power threshold via photoresistance feedback
  • Structure reducing micro cavity thermal-optical bistable state power threshold via photoresistance feedback
  • Structure reducing micro cavity thermal-optical bistable state power threshold via photoresistance feedback

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Embodiment

[0043] figure 2 The thickness of the middle and lower cladding layer 2 is 2um; the width of the ridge of the waveguide layer 3 is 500nm, the height of the inner ridge is 220nm, and the height of the outer ridge is 60nm; the thickness of the upper cladding layer 4 is 1.5um. The heavily doped region 7 is p-type doped with a width of 4um and a doping concentration of 10 20 cm -3 ; Lightly doped intrinsic i region 6 doping concentration 10 15 cm -3 ; The distance between the edge of the heavily doped region 7 and the edge of the waveguide core region is 300nm; the width of the through hole is 1um; a p-i-p thermal resistance structure is formed. The relationship between the voltage and current of this p-i-p thermal resistance structure is as follows image 3 As shown, after the voltage increases to ~9.5V, the resistance decreases continuously as the voltage increases. When the applied voltage is 4V, the temperature distribution of the structure after stabilization is as follow...

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Abstract

A structure reducing micro cavity thermal-optical bistable state power threshold via photoresistance feedback comprises a micro resonant cavity and photoresistance, wherein the photoresistance is in a p-i-p or a n-i-n structure and suitable for various resonant cavity structures; the is integrated into the cavity; after currents are injected by an external power supply, electricity can be converted to a part of heat energy by the use of the existing current heat effect of the photoresistance; heat is mainly produced in a wave guide core area and can be directly applied to a light field; compared with a present micro cavity structure, micro resonance thermal-optical nonlinearity effect is enhanced, so micro cavity refractive index adjusting amplitude is positively associated with luminous power, threshold of the thermal bistable state is reduced and demands for device machining is greatly reduced; and wide application prospects are provided in the optical communication, optical storage and integral optical fields.

Description

technical field [0001] The invention relates to a structure that uses photoresistor feedback to reduce the threshold value of microcavity thermo-optic bistable optical power. The photoresistor is used as a microcavity heater, so that the adjustment range of the microcavity refractive index is positively correlated with the optical power intensity, thereby enhancing resonance Thermo-optic nonlinear effects, reducing the optical power threshold of bistability, belong to the field of integrated optoelectronics. Background technique [0002] Optical bistability (OB) is an important research topic in the intersection of nonlinear optics and optoelectronics. It means that an optical system has two different stable output states under a given input light intensity. Described as a hysteresis loop relationship between the output and input light intensity curves. This unique optical property can realize a variety of all-optical signal processing functions, such as logic units, switch...

Claims

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Application Information

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IPC IPC(8): G02F3/02
CPCG02F3/024
Inventor 王敏娟周林杰陆梁军陈建平
Owner SHANGHAI JIAO TONG UNIV
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