Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure
Reexamination Certificate
2007-04-26
2010-10-05
Le, Thao X (Department: 2892)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
C257SE25032, C438S032000
Reexamination Certificate
active
07808005
ABSTRACT:
Various aspects of the present invention are directed to light-emitting devices including a photonic grating configured to extract spontaneous emission of electromagnetic radiation from a light-emitting structure. In one aspect of the present invention, a light-emitting device includes a light-emitting structure having an active region designed to emit electromagnetic radiation with a selected frequency. The light-emitting device further includes a photonic grating spaced from the active region of the light-emitting structure. The photonic grating is capable of supporting a leaky guided mode that extends within the active region of the light-emitting structure. The leaky guided mode has a mode frequency approximately equal to the selected frequency emitted by the active region and a mode wavevector that is approximately equal to a reciprocal lattice vector of the photonic grating.
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Fan, Shanhui, et al., “High Extraction Efficiency of Spontaneous Emission from Slabs of Photonic Crystals”, The American Physical Society, vol. 78, No. 1, Apr. 28, 1997, pp. 3294-3297.
Boroditsky, Misha, et al., Spontaneous Emission Extraction and Purcell Enhancement from Thin-Film 2-D Photonic Crystals, Journal of Lightwave Technology, vol. 17, No. 11, Nov. 1999, pp. 2096-2112.
Erchak, Alexei A., “Enhanced coupling to vertical radiation using a two-dimensional photonic crystal in a semiconductor light-emitting diode”, Appl. Phys. Lett., vol. 78, No. 5, Jan. 29, 2001, pp. 563-565.
Beausoleil Raymond G.
Fattal David A.
Sigalas Mihail
Gordon Matthew
Hewlett--Packard Development Company, L.P.
Le Thao X
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