Terahertz wave communication device based on quantum two-photon entanglement

Abstract

The invention discloses a terahertz wave communication device based on quantum two-photon entanglement. The terahertz wave communication device comprises a pump light source, a half-wave plate, a polarization beam splitter, a convex lens, an MgO:LiNbO3 crystal, an information space encoder, a terahertz photon collection lens, a narrow-band filter, a terahertz single-photon detector, a single-photon counter, a coincidence measurement device and an information space decoder. Pump light emitted out from the pump light source is converged through the convex lens so as to stimulate the MgO:LiNbO3 crystal to generate a terahertz photon communication channel with the entanglement property and a stokes photon communication channel with the entanglement property. The information space encoder, the terahertz photon collection lens, the narrow-band filter and the terahertz single-photon detector are placed on the terahertz photon communication channel. The single-photon counter is placed on the stokes photon communication channel. Quanta output by the terahertz single-photon detector and quanta output by the single-photon counter enter the coincidence measurement device along with mechanical and electrical pulse signals, and original communication information is reproduced by utilizing the information space decoder.

Description

Technical field [0001] The invention relates to the technical field of terahertz optoelectronics, in particular to a terahertz wave communication device based on quantum two-photon entanglement. Background technique [0002] Terahertz wave is an electromagnetic wave with a wavelength in the range of 30μm-3mm, and its waveband is between far infrared and microwave. Terahertz waves have high penetrability to most non-polar materials, sand and dust, plastic polymers, wood, paper, semiconductor materials, etc., and the energy of terahertz wave photons is only 1 / the energy of X-ray photons. 10 6 , Will not produce harmful ionization to biological tissues, so terahertz wave technology has been widely used in security inspections, weapon guidance, space communications, anti-terrorism, biomedical imaging and other application technologies. [0003] With the development of high-speed wireless communication technology and people's increasing requirements for large-capacity and high-speed t...

AI Technical Summary

Problems solved by technology

[0004] At present, in the existing terahertz communication technology, when the terahertz wave carrier carrying communication code information is transmitted between the transmitting device and the receiving device, it is easily subject to random interference from the external environment, such as air flow, humidity changes, smoke, etc. , and it is easy to be intercepted and decoded by a third party, which makes the conventional terahertz communication technology urgently need to be further improved in terms of anti-interference ability and security

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