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US 2004/0017834 A1Published application
Creating photon atoms
AssigneeMassachusetts Institute of Technology
InventorsVikram C. Sundar, Moungi G. Bawendi, John D. Joannopoulos, Mihai Ibanescu
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Abstract
A narrow linewidth fluorescent emitter can incorporate a chromophore into a microcavity that can support low-order optical modes.
Claims31
A fluorescent emitter comprising:
- a core including a chromophore defining an emission profile;
- and
- a plurality of dielectric layers surrounding the core, each layer having a thickness and a refractive index such that the plurality of dielectric layers causes at least a portion of the emission profile to narrow upon passing through the plurality of dielectric layers.
A photonic structure comprising:
- a core which in isolation defines a density of states for allowed modes of electromagnetic radiation;
- and
- a plurality of dielectric layers surrounding the core, each layer having a thickness and refractive index such that the plurality of dielectric layers causes the density of states to narrow.
A photonic superstructure comprising a plurality of photonic structures,
- wherein each photonic structure comprises
- a core which in isolation defines a density of states for allowed modes of electromagnetic radiation;
- and
- a plurality of dielectric layers surrounding the core, each layer having a thickness and refractive index such that the plurality of dielectric layers causes the density of states to narrow, and wherein the photonic structures are sufficiently close to one another to couple their allowed modes of electromagnetic radiation.
1 more element
A light emitting display comprising:
- a plurality of narrow-linewidth, fluorescent emitters, wherein each emitter comprises
- a core including a chromophore defining an emission profile;
- and
- a plurality of dielectric layers surrounding the core each layer having a thickness and a refractive index such that the plurality of dielectric layers causes at least a portion of the emission profile to narrow upon passing through the plurality of the dielectric layers.
1 more element
A laser comprising:
- a gain medium comprising a plurality of narrow-linewidth, fluorescent emitters, wherein each emitter comprises:
- a core including a chromophore defining an emission profile;
- and
- a plurality of dielectric layers surrounding the core each layer having a thickness and a refractive index such that the plurality of dielectric layers causes at least a portion of the emission profile to narrow upon passing through the plurality of the dielectric layers;
- a pumping source arranged to excite a population inversion in the gain medium;
- and
- an optical cavity surrounding the gain medium.
4 more elements
A method of making a photonic structure comprising:
- providing a core defining a density of states for allowed modes of electromagnetic radiation, and
- surrounding the core with a plurality of dielectric layers capable of narrowing at least a portion of the density of states.
Dependencies are inferred from the claim text.