TERAHERTZ DETECTION CELL

摘要

According to a first aspect of the invention, the invention relates to a terahertz detection cell for detecting radiations having frequencies within a given spectral detection band, said cell comprising: a polar semi-conductor crystal structured such that it forms at least one slab of crystal, said crystal (330) having a Reststrahlen band covering said spectral detection band, and comprising at least one interface with a dielectric means; coupling means obtained by the slab structure (330), each slab forming an optical antenna, enabling the resonant coupling of an interface phonon polariton (IPhP) supported by said interface and an incident radiation having a frequency within the spectral detection band; and at least one first and one second connection terminal (301, 302) that are in electrical contact respectively with a first and a second end of the interface, said ends opposing each other, and said connection terminals to be connected to an electrical reading circuit for measuring the variation of the impedance of the crystal between the opposing ends of the interface.

主权项

1. A terahertz detection cell for the detection of radiations of frequencies included in a given spectral detection band, comprising:
a semi-conductor polar crystal having a Reststrahlen band covering said spectral detection band and having at least one interface with a dielectric medium; coupling means allowing the resonant coupling of an interface phonon polariton (IPhP) supported by said interface and of an incident radiation of frequency included in said spectral detection band; and at least one first and one second connection terminals in electrical contact respectively with a first and a second opposite ends of said interface and intended to be connected to an electrical reading circuit for the measurement of the impedance variation of the crystal between said opposite ends of the interface.