Terahertz continuous wave emitting device
Provided herein is terahertz continuous wave emitting device having: a plurality of laser light sources generating a plurality of laser lights; and an absorption area formed between the plurality of laser light sources in order to adjust interaction of the plurality of laser lights, wherein the absorption area is configured to have a photo diode, an antenna integrated into the photo diode.
1. A terahertz continuous wave emitting device comprising:
a first laser light source generating a first laser light;
a second laser light source generating a second laser light;
a photomixer formed between the first laser light source and the second light source, the photomixer generating a beating light from the first and second laser lights, the photomixer generating a current from the beating light, the photomixer emitting terahertz waves,
wherein:
the photomixer is disposed in a linear arrangement with the first and second laser light sources and has two opposite sides which are respectively directly coupled to the first laser light source and the second laser light source, such that the photomixer and the first and second laser light sources collectively form a single device; and
the photomixer includes:
an absorption area adjusting interaction of the first and second laser lights, and generating the beating light;
a photodiode generating the current from the beating light, the photodiode being formed in the absorption area between the first and second laser light sources; and
an antenna emitting terahertz continuous waves based on the current generated by the photodiode, the antenna integrated into the photodiode and formed between the first and second laser light sources.
2. The device according to claim 1 , wherein the first and second laser light sources generate laser lights having different wavelengths.
3. The device according to claim 1 , wherein the first laser light source or the second laser light source is embodied by a DFB LD (Distributed Feedback Laser Diode).
4. The device according to claim 1 ,
wherein the photodiode of the absorption area has a first side facing the first laser light source and a second side facing the second laser light source.
5. A method of emitting a terahertz continuous wave, the method comprising:
forming a photomixer between a first laser light source and a second laser light source, such that the photomixer is coupled to the first and second laser light sources, the photomixer is disposed in a linear arrangement with the first and second laser light sources and has two opposite sides which are respectively directly coupled to the first laser light source and the second laser light source, and the photomixer and the first and second laser light sources collectively form a single device, wherein the photomixer consists of an absorption area, a photodiode formed in the absorption area between the first and second laser light sources and an antenna formed between the first and second laser light sources, the antenna being integrated into the photodiode;
generating a first laser light having a first wavelength by the first laser light source, and generating a second laser light having a second wavelength by the second laser light source;
generating a beating light by the photomixer through beating the first and second laser lights in the absorption area;
generating a current by the photomixer at the photodiode using the beating light; and
emitting a terahertz continuous wave by the photomixer at the antenna using the current provided from the photodiode.
6. The method according to claim 5 ,
wherein the photodiode of the absorption area has a first side facing the first laser light source and a second side facing the second laser light source.