Active solid-state devices (e.g. – transistors – solid-state diode – Heterojunction device – Light responsive structure
Patent
1991-06-18
1993-06-29
James, Andrew J.
Active solid-state devices (e.g., transistors, solid-state diode
Heterojunction device
Light responsive structure
257187, 257190, 257197, 257200, 257257, 372 45, 372 50, H01L 29161, H01L 2980, H01L 2702, H01S 319
Patent
active
052237230
ABSTRACT:
A novel light emitting semiconductor device is disclosed. The device utilizes real space transfer (RST) of carriers, and comprises regions of opposite conductivity type separated by a barrier layer. The first region (termed the "emitter") comprises at least two contacts. Application of appropriate bias between the two contacts and between the emitter and the second region results in injection of hot carriers into the second region, resulting in luminescence in the second region. The invention can be embodied in coherent as well as incoherent light sources. A preferred embodiment is a vertical cavity surface emitting laser. The device can serve as a novel logic element that has electrical inputs and an optical output, and provides a non-trivial logic function.
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AT&T Bell Laboratories
James Andrew J.
Martin Valencia M.
Pacher Eugen E.
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