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Novel sources and detectors for coherent tunable narrow-band terahertz radiation in free space
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 1996 |
| Abstract | A novel scheme for the optical generation and coherent detection of tunable narrow-band far-infrared radiation in free space is described. This technique involves the optical heterodyning of two linearly chirped broadband pulses to produce a quasi-sinusoidal intensity modulation at tunable terahertz frequencies. The frequency content of the narrow-band terahertz radiation produced by mixing chirped optical pulses in a nonlinear optoelectronic device such as a photoconducting dipole antenna can be tailored simply by controlling the phase modulation of the optical pulses and the delay between them. An optoelectronic terahertz beam system composed of a tunable narrow-band Hertzian dipole emitter and a synchronously gated tunable dipole detector is presented. The performance of this system as a potentially powerful tool for far-infrared pump–probe spectroscopy and the limitations produced by cubic phase modulation in the chirped optical pulses are discussed. © 1996 Optical Society of America. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.eleceng.adelaide.edu.au/groups/thz/documents/weling_1996_job.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Antenna Device Component Carrier recovery Coherence (physics) Cubic function Detectors Dipole antenna Emitter Device Component Heterodyne Lambert's cosine law Modulation Nonlinear system Radiation Pneumonitis Terahertz |
| Content Type | Text |
| Resource Type | Article |
