Terahertz nonlinear index extraction via full-phase analysis
| Autor: | Mervin Lim Pac Chong, Yiwen E, Kareem J. Garriga Francis, Xi-Cheng Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Atmospheric pressure Spectrometer Terahertz radiation business.industry FOS: Physical sciences Nonlinear optics 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Optics Orders of magnitude (time) Attenuation coefficient 0103 physical sciences Atomic physics 0210 nano-technology business Refractive index Physics::Atmospheric and Oceanic Physics Water vapor Optics (physics.optics) Physics - Optics |
| Zdroj: | Optics Letters. 45:5628 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.399999 |
| Popis: | We experimentally show the spectrally averaged nonlinear refractive index and absorption coefficient for liquid water, water vapor, {\alpha}-pinene, and Si using a full-phase analysis in the terahertz regime through a standard time-domain spectrometer. Our results confirm that the nonlinear index of refraction of the liquid samples in this regime exceeds the near-infrared optical nonlinear index by six orders of magnitude. In the case of liquid water and water vapor at atmospheric pressure, we find a nonlinear index of 7.8x10^-10 cm^2/W and 6x10^-11 cm^2/W respectively, which are both much larger than expected. Comment: 5 pages, 2 figures, 1 table |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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