A light-emitting device comprises a light source in the form of an incandescent filament, a substantial part of which is integrated in a host element having at least one portion structured according to nanometric dimensions. The nano-structured portion is in the form of a photonic crystal or of a Br
A light-emitting device comprises a light source in the form of an incandescent filament, a substantial part of which is integrated in a host element having at least one portion structured according to nanometric dimensions. The nano-structured portion is in the form of a photonic crystal or of a Bragg grating for the purpose of obtaining an amplified or increased emission of radiation in the region of the visible.
대표청구항▼
What is claimed is: 1. A light-emitting device comprising a substantially filiform light source capable of being activated via passage of electric current for the purposes of emission of electromagnetic waves, wherein: at least one filiform source extends through a host element longitudinally exten
What is claimed is: 1. A light-emitting device comprising a substantially filiform light source capable of being activated via passage of electric current for the purposes of emission of electromagnetic waves, wherein: at least one filiform source extends through a host element longitudinally extended; and wherein at least part of the host element includes a nano-structure configured to increase emission, from the host element, of electromagnetic waves having wavelengths in a range of 380 to 780 nm and to prevent spontaneous emission and propagation, from the host element, of infrared radiation, the nano-structure comprising a periodic series of cavities having nanometric dimensions and each filiform source extending through a plurality of the cavities of the periodic series; and wherein said part of the host element is structured in the form of a photonic crystal configured to obtain a photonic band gap that prevents said spontaneous emission and propagation of infrared radiation and increases said emission of electromagnetic waves having wavelengths in said range of 380 to 780 nm. 2. The device according to claim 1, wherein said filiform source is formed at least in part by a continuous material. 3. The device according to claim 2, wherein said filiform source is formed of tungsten. 4. The device according to claim 1, wherein said filiform source comprises a filament capable of incandescence. 5. A light-emitting device, comprising: a filiform light source capable of being activated via passage of electric current for the purposes of emission of electromagnetic waves; and a host element having a longitudinally-extending body including a nano-structure adapted to: increase emission of electromagnetic waves having wavelengths in a visible range; and prevent emission of electromagnetic waves having wavelengths in an infrared range, the nano-structure including a succession of projections of said body, said projections being aligned and spaced apart with each other in a longitudinal direction of said body to define an orderly and periodic series of cavities having nanometric dimensions, each of said cavities being defined between two successive projections of said succession; wherein the light source has a length and at least a part thereof extending in a length direction both through said cavities and through said projections of the nano-structure; wherein the body of the host element has a base portion spaced apart from the light source; wherein the base portion extends in a length direction of the light source; wherein said projections rise from said base portion such that each of said cavities has a respective bottom surface defined by said base portion; and wherein said nano-structure of the host element is in the form of a photonic crystal periodic in one dimension. 6. The device according to claim 5, wherein said cavities have a depth; and wherein the light source traverses the cavities at an intermediate region of the depth at a distance from said bottom surface. 7. The device according to claim 6, wherein said projections have a height; and wherein the light source traverses the projections at an intermediate region of the height. 8. The device according to claim 6, wherein a portion of said filiform source that traverses the projections of said succession extends to approximately half of the height of the projections. 9. The device according to claim 5, wherein said light source is formed by a single wire made of tungsten. 10. The device according to claim 5, wherein said light source comprises an incandescence filament. 11. The device according to claim 5, wherein said body of the host element comprises a transparent material. 12. A light-emitting device comprising a substantially filiform light source capable of being activated via passage of electric current for the purposes of emission of electromagnetic waves, wherein: at least one filiform source extends through a host element longitudinally extended; wherein at least part of the host element includes a nano-structure configured to increase emission, from the host element, of electromagnetic waves having wavelengths in a range of 380 to 780 nm and to prevent spontaneous emission and propagation, from the host element, of infrared radiation, the nano-structure comprising a periodic series of cavities having nanometric dimensions and each filiform source extending through a plurality of the cavities of the periodic series; wherein the host element has a longitudinally-extending body including: a base portion spaced apart from said light source and extending in a length direction of the light source; and a succession of projections rising from said base portion, said projections aligned and spaced apart with each other in a longitudinal direction of said base portion to define said periodic series of cavities, each of said cavities being defined between two successive projections of said succession and having a respective bottom surface defined by said base portion; wherein said light source extends, in the length direction thereof, both through said cavities and through said projections of the nano-structure; wherein the host element is in the form of a photonic crystal, said projections and said cavities being periodic in a length direction of the base portion to form a grating having a pitch; the projections have a height and a width; the grating has a filling factor defined by the ratio of the width of the projections to the pitch of the grating; and wherein said filling factor and said pitch are selected to obtain a photonic band gap that prevents said spontaneous emission and propagation of infrared radiation and increases said emission of electromagnetic waves having wavelengths in said range of 380 to 780 nm. 13. The device according to claim 12, wherein the cavities have a depth and a portion of said filiform source that traverses the cavities of said periodic series extends to approximately half of the depth of the cavities, at a distance from bottom surfaces thereof. 14. The device according to claim 13, wherein a portion of said filiform source that traverses the projections of said succession extends to approximately half of the height of the latter. 15. The device according to claim 13, wherein said filiform source comprises a filament capable of incandescence. 16. The device according to claim 12, wherein portions of said filiform source traverse the plurality of cavities of the periodic series at a uniform depth. 17. The device according to claim 16, wherein the uniform depth is half of the depth of a respective cavity. 18. The device according to claim 12, wherein said part of the host element is structured in the form of a photonic crystal configured to obtain a photonic band gap that prevents said spontaneous emission and propagation of infrared radiation and increases said emission of electromagnetic waves having wavelengths in said range of 380 to 780 nm. 19. The device according to claim 12, wherein said filling factor and said pitch are selected to enable a peak of emission of electromagnetic waves in a given area of said range of 380 to 780 nm. 20. The device according to claim 19, wherein said given area of said range of 380 to 780 nm is selected to cause emission of light visible as blue. 21. The device according to claim 19, wherein said given area of said range of 380 to 780 nm is selected to cause emission of light visible as red. 22. The device according to claim 19, wherein said given area of said range of 380 to 780 nm is selected to cause emission of light visible as green. 23. A light-emitting device comprising a substantially filiform light source capable of being activated via passage of electric current for the purposes of emission of electromagnetic waves, wherein: at least one filiform source extends through a host element longitudinally extended; wherein at least part of the host element includes a nano-structure configured to increase emission, from the host element, of electromagnetic waves having wavelengths in a range of 380 to 780 nm and to prevent spontaneous emission and propagation, from the host element, of infrared radiation, the nano-structure comprising a periodic series of cavities having nanometric dimensions and each filiform source extending through a plurality of the cavities of the periodic series; and wherein said part of the host element is structured in the form of a photonic crystal configured to enable a peak of emission of electromagnetic waves in a given area of said range of 380 to 780 nm. 24. The device according to claim 23, wherein said given area of said range of 380 to 780 nm is selected to obtain emission of one of a blue visible light, a red visible light, a green visible light.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Waymouth John W. (Marblehead MA), Electromagnetic radiators and process of making electromagnetic radiators.
Bigio Laurence (Schenectady NY) Ranish Joseph M. (Cleveland Heights OH) Briant Clyde L. (Charlton NY) Wilson Ronald H. (Schenectady NY) Ackerman John F. (Cheyenne WY), Incandescent lamp filament with surface crystallites and method of formation.
Hill Kenneth O. (Kanata CAX) Malo Bernard Y. (Gatineau CAX) Bilodeau Francois C. (Nepean CAX) Johnson Derwyn C. (Nepean CAX), Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.