| Autor: |
Xi-Cheng Zhang, Kareem J. Garriga Francis, Yiwen E, Mervin Lim Pac Chong |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Infrared, Millimeter-Wave, and Terahertz Technologies VII. |
| DOI: |
10.1117/12.2575255 |
| Popis: |
Nonlinear THz spectroscopy extends the full-phase analysis of traditional THz-TDS onto the high-intensity regime. With THz sources reaching peak electric fields in excess of hundreds of kV/cm, it is now possible to induce large index changes in some materials. In the case of liquid water, a nonlinear index of 7.8x10-10 cm2/W is confirmed. This value is large enough to break the perturbative regime when sources with peak electric fields in the MV/cm range are used. In addition, the spectrally resolved nonlinear index dispersion can also be extracted. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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