Second-order nonlinear optical film material and preparation method thereof

• Main Authors: LIU QIMING, ZHAO XIUJIAN
• Format: Patent
• Language: Chinese; English
• Published: 14.09.2011
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention provides a second-order nonlinear optical film material based on a p-n junction and a preparation method thereof. The second-order nonlinear optical film material is composed of more than one layer of film materials, an overlapped multilayer film material in a p/n.../p or n/p.../n form is respectively formed by a n-type or p-type semiconductor material; and the semiconductor material at least comprises a layer of p-type and a layer of n-type semiconductor film to form a p-n junction. The preparation method of the second-order nonlinear optical film material comprises a film system structure design and a preparation step of the second-order nonlinear optical film material. The nonlinear optical material of the structure is suitable for designing the second-order nonlinear optical material for high second-order harmonic generation, the practicality of frequency doubling efficiency can be adjusted by changing the thickness of the film and the layers of the film; and the product can be widely applie