Time Delay Device Based on Tunneling-Induced Transparency Effect of Quantum Well Subband Transition

Abstract

The invention belongs to the technical field of semiconductor materials, and relates to a time delay device based on the tunneling-induced transparency effect of quantum well sub-band transition, in particular to a time delay device used in the photoelectron field. The time delay device is structurally characterized in that an AlAs layer (2), a first barrier layer (3), a shallow quantum well layer (4), a second barrier layer (5), a deep quantum well layer (6), a third barrier layer (7) and a continuous area (8) grow on a substrate (1) of a GaAs material in sequence; six to fifteen cycles each of which is formed by a first barrier layer (3), a shallow quantum well layer (4), a second barrier layer (5), a deep quantum well layer (6), a third barrier layer (7) and a continuous area (8) are arranged; then, a covering layer (9) is arranged, and an air isolation layer (10) is arranged on the outermost layer. The delay time of the time delay device can reach the picosecond level, and the time delay device can be applied to the photoelectron field. The time delay device is more practical than a delay time device with an atom system, the structure and materials of the time delay device can be manually selected, and the coherent intensity of the time delay device can be controlled and changed.

Description

technical field [0001] The invention belongs to the technical field of semiconductor materials, in particular to a time delay device used in the field of optoelectronics. Background technique [0002] Optical time delay devices have application value in the field of optical information processing and processing, for example, encoding, decoding, filtering, and convolution calculation of optical signals. The existing similar optical time delay system is the atomic Lambda three-level system with electromagnetically induced transparency in the cavity. In the atomic three-level system, a beam of probe light and a beam of strongly coupled light are incident in parallel to the sample cell containing gas atoms, similar to the interaction between subbands |2> and |3> of the present invention This is achieved by strengthening the coherent field. Compared with the coupling interaction of the microcavity structure itself using semiconductor superlattice materials, the atomic sys...

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Problems solved by technology

Compared with the coupling interaction of the microcavity structure itself using semiconductor superlattice materials, the atomic system has disadvantages such as excessive interaction strength, short delay time, and inability to work at the wavelength of communication.

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