Optical detector based on surface plasmon polariton electrical modulation transition metal sulfide exciton binding energy, preparation method and application thereof

Abstract

The invention belongs to the technical field of detectors. The invention provides an optical detector based on surface plasmon polariton electrical modulation transition metal sulfide exciton bindingenergy, a preparation method and application thereof. The method comprises the following steps of: evaporating a gold nano disc array serving as a plasmon array into a channel of a two-dimensional molybdenum disulfide optical detector; and achieving dynamic regulation and control of interaction between molybdenum disulfide excitons and plasmon under different back gate voltages, so that the problem of low quantum efficiency of a two-dimensional semiconductor is overcome, and the problem of low light absorption and luminous efficiency of a two-dimensional optical detector is improved.

Description

technical field [0001] The invention relates to the technical field of detectors, in particular to a molybdenum disulfide photodetector, which is a photodetector based on surface plasmon electrical modulation of transition metal sulfide exciton binding energy, a preparation method and an application. Background technique [0002] With the development of optoelectronic informatization today, it is difficult for traditional detector configurations to break through the optical diffraction limit. Therefore, the demand for on-chip integration of light fields that break through the diffraction limit is imminent. [0003] The layers of two-dimensional semiconductor materials are contacted by van der Waals force, the plane is a perfect single crystal, the electronic state is complete, and the carriers are transported on the highway, with a high response speed, and it has a wide range of applications in many fields such as photodetectors prospect. However, the light absorption and q...

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