| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for mounting a double wavelength quantum cascade photon source. SOLUTION: A quantum cascade(QC) photon source has two different wavelengths which are both medium infrared rays normally which can be released at the same time. This can be realized by a structure of semiconductor layers in which electrons are injected into an energy level E3 and then are forcefully cascade connected to an inter medium level E2 before they reach a ground state E1 in an operation area. In these operations, photons of energy E3 -E2 (wavelength λ1 ) and E2 -E1 (wavelength λ2 ) are released. The double wavelength photon source according to the present invention can be used for various purposes, for example, for determining absorption amount of gas sample at wavelengths λ1 and λ2 and generally for determining density of a specified chemical compound in a sample. |
