Method for modulating temperatures of electromagnetic waves based on surface plasma wave transmission distance

Abstract

The invention discloses a method for modulating temperatures of electromagnetic waves based on a surface plasma wave transmission distance. The method comprises the following steps of: arranging two parallel metal blades, namely a first blade and a second blade above the surface of an intrinsic semiconductor panel; transmitting the electromagnetic waves of which the frequency is lower than the plasma frequency of the intrinsic semiconductor panel from the outer side of the first blade to a clearance between the cutting edge of the first blade and the intrinsic semiconductor panel, and exciting surface plasma waves which are transmitted along the surface of the intrinsic semiconductor panel on the surface of the intrinsic semiconductor panel; and keeping the distance between the first blade and the second blade constant, and adjusting the temperature of the intrinsic semiconductor panel to ensure that the transmission distance of the surface plasma waves on the surface of the intrinsic semiconductor panel is changed and the intensity of the electromagnetic waves coupled at the cutting edge of the second blade is changed along with the variation of the transmission distance so as to modulate the electromagnetic waves. The method has the advantages that the method is small in temperature range, high in modulation speed, simple in hardware structure, easy to realize, and the like; and wideband electromagnetic waves can be modulated in a return-to-zero mode and a non-return-to-zero mode.

Description

technical field [0001] The invention relates to an electromagnetic wave modulation method, in particular to an electromagnetic wave temperature modulation method based on the surface plasma wave transmission distance, and belongs to the technical field of electromagnetic modulation. Background technique [0002] At present, the research on surface plasmon waves is mainly concentrated in the optical and near-infrared frequency bands, and the conductor material used is metal. However, surface plasmon waves can not only transmit on metal surfaces, but also on semiconductor surfaces. Semiconductors confine low-frequency surface plasmon waves near the surface better than metals. Moreover, one of the outstanding advantages of semiconductors compared with metals is that the carrier concentration of semiconductors can be easily changed by changing the temperature, so that the transmission characteristics of surface plasmon waves on the surface of semiconductors can be changed by act...

AI Technical Summary

Problems solved by technology

Although the modulation frequency band is relatively wide compared with the technique of J. Gómez Rivas, this method requires a large temperature change range to achieve the relative change of the intrinsic semiconductor plasma frequency and the electromagnetic wave frequency

Due to the limited range of temperature changes and the limited range of changes in the intrinsic semiconductor plasma frequency, the modulation frequency range of surface plasmon waves is limited, which affects the general application of this technology.

Images