Super radiative light emitting transistor with self organized quantum spot as active region

Abstract

A superradiance light emission tube whose self-organizing quantum dots is active area, includes: a upper limit layer, a upper graded index wave-guide layer,, it is set under the upper limit layer; a self-organizing quantum dots active area, it is set under the upper graded index wave-guide layer, a lower graded index wave-guide layer, it is set under the self-organizing quantum dots active area; a lower limit layer, it is set under the lower graded index wave-guide layer; a substrate layer, it is set under the lower limit layer; a layer of medium film, it is deposited on the upper limit layer; on the medium film corrupts gradient strip-shaped current injected area. Thereinto the self-organizing quantum dots active area includes: the quantum dots with five period; on this InAs quantum dots with five period has a stress buffer layer, on each stress buffer layer has a spacer layer.

Description

Technical field: [0001] The invention relates to a semiconductor device, in particular to a superluminescent light-emitting tube with self-organized quantum dots as active regions. Background technique [0002] Superluminescent tube is a semiconductor optoelectronic device developed in the past ten years. It is an incoherent light source with internal gain. Its optical characteristics are between semiconductor lasers and light-emitting diodes. Compared with lasers, superluminescent The luminescent tube has a wider luminescence spectrum and a shorter coherence length, which can significantly reduce the noise caused by Rayleigh backscattering and nonlinear optical Kerr effect in the fiber circle, as well as the mode distribution noise of fiber transmission; and the SLD The temperature characteristics are relatively good. Compared with general light-emitting diodes, the output power of superluminescent light-emitting tubes is higher; the divergence angle is smaller and the coup...

AI Technical Summary

Problems solved by technology

[0004] (1) The single quantum well structure is used as the active region of the superluminescent tube, and the high operating current is designed so that n=1 (ground state transition) and n=2 (first excited state transition) are introduced simultaneously and equally. , to get a wider output spectrum, the disadvantage is that the operating current is high, the thermal effect of the device is obvious, which limits the increase of output power

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