CN202393936U - Flexible overlong surface plasmon waveguide - Google Patents
Flexible overlong surface plasmon waveguide Download PDFInfo
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- CN202393936U CN202393936U CN201120554254XU CN201120554254U CN202393936U CN 202393936 U CN202393936 U CN 202393936U CN 201120554254X U CN201120554254X U CN 201120554254XU CN 201120554254 U CN201120554254 U CN 201120554254U CN 202393936 U CN202393936 U CN 202393936U
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- plasmon wave
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Abstract
The utility model provides a flexible overlong surface plasmon waveguide comprising a photoelectric input end, a photoelectric output end, a flexible substrate and a flexible surface plasmon waveguide line array. The flexible surface plasmon waveguide is manufactured on the flexible waveguide substrate, and then a plane waveguide structure is bent to be subjected to edge aligned welding so as to finally form an overlong surface plasmon waveguide structure with the independent photoelectric input and output ends. The flexible surface plasmon waveguide array comprises a flexible organic polymer coating layer and a waveguide metal core layer; and metal materials are selected from precious metal materials, such as gold, sliver, copper and aluminum, which have the surface plasma resonance characteristics at an optical frequency wave band. The optical waveguide structure which is quite good in flexibility is manufactured by organic flexible polymer materials and can be freely bent and even folded, and thus the volume is small and the portability is improved. The surface plasmon waveguide capable of conducting optical signals and electric signals simultaneously can serve as the core layer, thereby breaking through the obstacle that the optical signals and the electric signals are incompatible.
Description
Technical field
The utility model belongs to the integrated optics technique field, particularly a kind of surface plasma excimer overlength optical waveguide based on flexible substrate.
Background technology
Along with the development of semiconductor and integrated optics technology level, prepare various waveguide devices with flexible substrate and become a reality.Existing plane light wave conductive substrate is mainly inorganic material such as glass, silicon chip; This technology exists temperature stability poor, and weight is bigger, and mechanicalness is not good; Be prone to shortcomings such as fragmentation; Adopt flexible organic polymer substrate to replace overcoming above shortcoming, with the flexible substrate of homalographic only be inorganic material substrate weight about 1/10th, the feasible vibrations generally speaking of excellent mechanical property are difficult to the flexible waveguide performance is impacted.
In recent years, along with the development of nano science and nano-electron, a kind of brand-new waveguiding structure one surface plasmon wave guide becomes the emerging research direction in integrated optics field.Surface plasma excimer is a kind of that propagate in the metal surface and be constrained on a kind of non-radiated electromagnetic wave on this surface.Surface plasma excimer is constrained on the free electron results of interaction that waveguide surface is light and metal.Surface plasmon wave guide has the not available characteristic of normal optical waveguide: as can be implemented in the signal transmission on the nanoscale; But the single polarization state in the holding signal long-range transmission course realizes single mode transport under the various sizes; The metal core layer structure of surface plasmon wave guide not only can propagating optical signal, can also propagating electrical signals, can be implemented in that photoelectricity mixes on the same chip; The specific inductive capacity of metal is a plural number, and its imaginary part is represented the light absorbing ability of metal, through the design limit distribution of light intensity to metal core layer; Can directly modulate with the high efficiency modulation of realizing the surface plasmon wave guide device to the metal core layer of surface plasmon wave guide etc.Based on these characteristics of surface plasmon wave guide, the surface plasmon wave guide device can be in optical communication, optical sensing field performance important application.
The surface plasmon wave guide (Long-range surface plasmon polaritons waveguide) of long-range transmission at present exists a technical bottleneck, and the surface plasmon wave guide through the planar optical waveguide prepared has very big bending loss exactly.This mainly is because metal nanometer line thickness is generally the 10-20 nanometer, and when waveguide wire was crooked, a little less than the constraint effect very of waveguide core layer to transmission mode, particularly when the waveguide bend radius was centimetre magnitude, obvious leak will take place mode light.Therefore, the waveguide of long-range surface plasma excimer generally only is used to prepare straight wave guide class device, and can't develop curved waveguide or delay line of overlength etc.
Summary of the invention
Technical matters: the utility model proposes a kind of flexible super-long surface plasmon wave guide; It adopts the flexible surface plasmon wave guide preparation technology on plane to aim at the overlength waveguide that solder technology realizes a kind of three-dimensional structure with the waveguide solid; But have photoelectric multiplexing, flexible; Volume is little, and preparation is simple, low cost and other advantages.
Technical scheme: the technical scheme of the utility model is achieved in that from structure to be seen; This flexible surface plasmon wave guide is made up of photoelectricity input end, photoelectric yield end, flexible substrate, flexible surface plasmon wave guide array; Flexible surface plasmon wave guide array is made on the flexible waveguide substrate; The surface plasmon wave guide structure is processed by the organic polymer flexible material, has good flexible, can carry out the bending of minor radius.It is characterized in that: flexible substrate has tubular structure; Wave guide process is on flexible substrate; Form the flexible plasmon waveguiding structure of spiral overlength; This overlength flexible optical waveguide structure is that the butt joint of curling of the flexible plasmon waveguide array by the plane of preparation forms three-dimensional tubular structure, and the planar flexible waveguide array of preparation is made up of several identical single flexible waveguide wires, and every waveguide all is the α angle with edges of substrate; α is generally zero degree to the several years; The output terminal of a certain waveguide is aimed at the input end of thereafter single optical waveguide with numbering in the surface plasmon wave guide array, and the series connection of joining of every waveguide first place of waveguide array is formed continuous helicon wave guide path, forms to have independently photoelectricity input end and independent photoelectricity output terminal flexible super-long surface plasmon wave guide.
The flexible super-long surface plasmon wave that the utility model proposed is led by flexible material substrate, waveguide metal sandwich layer, organic polymer waveguide covering and is formed; Can be rectangle, ridged, ridged; Bar carries the shape structure; Wherein metal surface plasma body excimer waveguide core layer size is in nanometer scale, and material is high conductivity materials such as gold, silver, and cladding thickness and width are several micron dimensions; Material is the suitable flexible organic polymer of refractive index, and the organic polymer substrate thickness is between several microns to several centimetres.
Flexible super-long surface plasmon wave guide light, circuit that the utility model proposed are following: light signal or electric signal are imported by the exterior light electric signal input end; Overlength plasmon waveguide via flexible waveguide linear array solid is formed by connecting is transmitted, finally by photoelectric yield end output light signal or electric signal or photoelectric multiplexing signal.
Beneficial effect: the utility model has following advantage compared with prior art:
1, the surface plasmon wave guide of the long-range of slab guide prepared transmission at present has very big bending loss.Its main cause is because metal nanometer line thickness is generally the 10-20 nanometer, and when waveguide wire was crooked, a little less than the constraint effect very of waveguide core layer to transmission mode, particularly when the waveguide bend radius was centimetre magnitude, obvious leak will take place mode light.Therefore, the waveguide of long-range surface plasma excimer generally only is used to prepare straight wave guide class device, and can't develop curved waveguide or delay line of overlength etc.The overlength surface plasmon wave guide of the curling shape that the utility model proposed; Technology, structure are different with the curved surface plasmon wave guide bending of conventional planar waveguide prepared; It is the overlength waveguide that optical waveguide substrates is vertically curled and connected into; When waveguide during with very big radius-of-curvature waveguide bend, mode signal still can be strapped in around metal core layer and the polymer in strictness, and bending loss is very little.Therefore the transmission range that has overlength has broken through a technical bottleneck of this technical field.
2, present waveguide can only be transmitted simple light signal, and existing technology can't realize both mixed propagations, can only adopt all very high modulation of loss noise cost, the mode of demodulation to transmit, and this also is the biggest obstacle that photosignal merges.The flexible super-long surface plasmon wave guide that the utility model proposed itself promptly has the multiplexing function of photosignal, can be with duration Distance Transmission light, electric signal.
3, the utility model proposed based on the flexible surface plasmon wave guide; Adopt the surface plasmon wave guide transmitting optical signal that combines with the flexible polymeric materials substrate; Regulate its spot size through change surface plasmon wave guide sandwich layer width and reach waveguide inter mode coupling, realize docking with the optical fiber low-loss.Utilize the distinctive transport property of surface plasmon wave guide, realize that the guarantor of light signal long-range transmission is inclined to one side, realize single mode transport under the different sandwich layer width, more be applicable to application such as high-precision optical gyro.
4, to be subject to its complicated structure very high to equipment requirements such as litho machines in existing planar structure waveguide, and the process conditions restriction is strict.The flexible super-long surface plasmon wave guide that the utility model proposed adopts plane surface plasmon straight wave guide technology of preparing, and equipment requirements is low, and can adopt the mode large-scale production of cylinder compacting, and equipment simply requires low and output is big.
5, the planar structure waveguide is because its loop configuration termination draws to exist with other waveguide rings disturbs, cause the device loss consistance poor, crosstalk bigger.The simple repetitive structure that the flexible super-long waveguide that the utility model proposes has has good loss consistance and optical signal noise characteristic.
Description of drawings
Fig. 1 is the flexible super-long surface plasmon wave guide schematic perspective view of stereo shaping.
Fig. 2 is the floor map before the moulding of flexible super-long surface plasmon wave guide.
Fig. 3 is the waveguiding structure synoptic diagram in the flexible super-long surface plasmon wave guide array.
The mode profile synoptic diagram of Fig. 4 conventional planar curved surface plasmon wave guide.
The mode profile synoptic diagram of Fig. 5 flexible vertical curved surface plasmon wave guide.
Wherein have: photoelectricity input end 1, photoelectric yield end 2, flexible substrate 3, flexible surface plasmon wave guide array 4, single waveguide output terminal 5 and single waveguide input end 6, flexible organic polymer covering 7, waveguide metal sandwich layer 8, flexible material substrate 9, silicon chip substrate 10.
Embodiment
Further describe below in conjunction with the technical scheme of accompanying drawing the utility model.The structure of the flexible super-long surface plasmon wave guide that the utility model proposed is as depicted in figs. 1 and 2.See from structure; This optical waveguide is made up of photoelectricity input end 1, photoelectric yield end 2, flexible substrate 3, flexible surface plasma filled waveguide array 4; Flexible surface plasmon wave guide array 4 is made on the flexible substrate 3; All surface plasmon waveguiding structure is processed by the organic polymer flexible material, has good flexible, can carry out the bending of minor radius; It is characterized in that: be planar structure before flexible substrate 3 stereo shapings; Wave guide process is on flexible substrate 3, and the planar flexible optical waveguide array structure for preparing curls to dock becomes tubular, and every single waveguide is docked the formation flexible super-long surface plasmon wave guide of connecting with the single waveguide wire of next root.The planar flexible waveguide array of preparation is made up of several identical single flexible waveguide wires, and every waveguide all is the α angle with edges of substrate, and α is a less angle.In crooked stereo shaping process; At first end face is carried out polishing; The bending aligning is carried out in the planar flexible waveguide then; Make the slab guide top and bottom waveguide wire that staggers, again the output terminal of last waveguide in the surface plasmon wave guide array and the input end of a back waveguide are aimed at, use mode such as ultra-violet curing adhesive curing to carry out the welding of waveguide then; The end to end series connection of every waveguide of waveguide array forms continuous helicon wave guide path, and final formation has and the tangent independent input end of waveguide ring and the flexible super-long surface plasmon wave guide of output terminal.
Flexible super-long optical waveguide flexibility organic polymer covering 7, waveguide metal sandwich layer 8, flexible material substrate 9 that the utility model proposed are formed; Its waveguide cross-section is as shown in Figure 3; Wherein metal surface plasma body excimer waveguide core layer thickness is 10-20 nanometer (x direction); Width is generally (y direction) between the 1-10 micron, and material is precious metal materials such as gold, silver, copper, aluminium.The surface plasmon wave guide cladding thickness is tens of microns, and material is flexible organic polymer.The organic polymer substrate thickness is between several microns to several centimetres.
Flexible super-long surface plasmon wave guide light, circuit that the utility model proposed are following: light, electric signal are imported by the photoelectricity input end; Overlength waveguide via flexible surface plasmon wave guide linear array solid is formed by connecting is transmitted, and is finally exported by the photoelectric yield end.Promptly form one via photoelectricity input end (1) → ... → A
IN→ (A
OUT& B
IN) → (B
OUT&C
IN) → (C
OUT& D
IN) → D
OUT→ ... Continuous light, the circuit of → photoelectric yield end (2) can be at the multiplexed signalss of same waveguide transmit optical signals, electric signal or both coexistences.
Fig. 4 and Fig. 5 are respectively the mode profile synoptic diagram of the flexible vertical curved surface plasmon wave guide that proposed of transmission mode distribution schematic diagram and the utility model of conventional planar curved surface plasmon wave guide.When the conventional surface plasmon wave guide transmits along bigger radius-of-curvature is crooked; Its mode profile synoptic diagram is as shown in Figure 4, because surface plasmon wave guide is merely the 10-20 nanometer at x direction metal core layer thickness, therefore; When traditional plain bending surface plasmon wave guide radius-of-curvature is big; Mode signal can't effectively be constrained near the metal core layer, and most of energy leaks to the y direction, causes bigger bending loss.Generally speaking, traditional plane surface plasmon wave guide radius-of-curvature is during greater than 2cm, and light signal can't transmit along wave guide direction.Therefore the conventional surface plasmon wave guide can't be prepared into around the overlength curved waveguide.Flexible surface plasmon wave guide bending direction and conventional surface plasmon wave guide bending direction that the utility model proposes are perpendicular.By shown in Figure 5, when this flexible surface plasmon wave guide during at the x-z plane inner bending, mode profile squints to the y direction.And because surface plasmon wave guide metal core layer width (along the y direction) is several microns, suitable with the mode light spot size, transmit near can effectively mode signal being constrained in metal core layer.Therefore, for the flexible surface plasmon wave guide waveguide that the utility model proposes, even the curvature of curved waveguide is several millimeters; Still can the mode signal tight-binding be transmitted near waveguide core layer; And have very little bending loss, also have very little bending loss, the method that just can utilize head and the tail to connect just because of this flexible waveguide; Be prepared into the crooked overlength surface plasmon wave guide of tubbiness, broken through a technical bottleneck of this technical field.
Claims (1)
1. flexible super-long surface plasmon wave guide; Constitute by photoelectricity input end (1), photoelectric yield end (2), flexible substrate (3), flexible surface plasmon wave guide array (4); It is characterized in that flexible surface plasmon wave guide array (4) is prepared on the flexible substrate (3); Then through the end face polishing; The crooked aligning and technology formation two ends such as the welding certain position that staggers, and have the independently spirality flexible super-long waveguiding structure of photoelectricity input end (1) and independent photoelectricity output terminal (2);
This overlength flexible surface plasmon wave guide structure is made and is got by flexible surface plasmon wave guide array curling butt joint the becoming tubular on plane; The edge of flexible surface plasmon wave guide array (4) and flexible substrate (3) at an angle; Flexible substrate (3) the two ends certain position that staggers bends to tubular; The single waveguide output terminal (5) that surface plasmon wave is led in the array is connected at one single waveguide input end (6) thereafter with numbering, and series connection formation has the independent light electrical input (1) that is easy to be of coupled connections and the flexible super-long surface plasmon wave guide of photoelectric yield end (2) independently;
Flexible surface plasmon wave guide array (4) is made up of flexible organic polymer covering (7) and waveguide metal sandwich layer (8); Surface plasmon wave guide is prepared on the flexible waveguide substrate (9); The precious metal material of the metal material of being selected for use for having the surface plasma resonance characteristic at the optical frequency wave band; Surface plasmon wave guide sandwich layer (8) is rectangle, ridged, fall ridged or bar carries the shape structure; Thickness and width are in nanometer scale, and flexible organic polymer covering (8) is processed by flexible organic polymer material, and thickness and width are several micron dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120554254XU CN202393936U (en) | 2011-12-27 | 2011-12-27 | Flexible overlong surface plasmon waveguide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120554254XU CN202393936U (en) | 2011-12-27 | 2011-12-27 | Flexible overlong surface plasmon waveguide |
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| CN202393936U true CN202393936U (en) | 2012-08-22 |
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| CN201120554254XU Expired - Lifetime CN202393936U (en) | 2011-12-27 | 2011-12-27 | Flexible overlong surface plasmon waveguide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436029A (en) * | 2011-12-27 | 2012-05-02 | 东南大学 | Flexible ultra-long surface plasmon polariton waveguide |
-
2011
- 2011-12-27 CN CN201120554254XU patent/CN202393936U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436029A (en) * | 2011-12-27 | 2012-05-02 | 东南大学 | Flexible ultra-long surface plasmon polariton waveguide |
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| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20120822 |