Heterogeneous layered structures for improved terahertz generation
One of the most effective ways of generating terahertz (THz) radiation involves the conversion of short-pulsed IR or visible laser light into THz pulses at significantly lower frequencies. This conversion can be accomplished using organic crystals with nonlinear optical crystal (NLO) properties for...
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| Veröffentlicht in: | Optics letters 2020-04, Vol.45 (7), p.2054-2057 |
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| container_issue | 7 |
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| container_title | Optics letters |
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| creator | Bahr, Charles B Green, Natalie K Heki, Larry K McMurray, Emmalee Tangen, Isaac C Valdivia-Berroeta, Gabriel A Jackson, Erika W Michaelis, David J Johnson, Jeremy A |
| description | One of the most effective ways of generating terahertz (THz) radiation involves the conversion of short-pulsed IR or visible laser light into THz pulses at significantly lower frequencies. This conversion can be accomplished using organic crystals with nonlinear optical crystal (NLO) properties for IR to THz conversion through optical rectification. Due to the high refractive indices of organic crystals, pump laser light as well as generated THz radiation is lost from reflections at crystal surfaces. Here we report a structure composed of a layered series of materials with intermediate refractive indices designed to reduce reflective losses and improve the THz generation from organic crystals. This structure increases the transmission coefficients for both infrared pump input and THz output. We combine simple theoretical calculations with experimental data to show that a structure composed of materials with intermediate refractive indices can be used to increase generated THz intensity by nearly 50%. |
| doi_str_mv | 10.1364/OL.388144 |
| format | Article |
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| identifier | ISSN: 0146-9592 |
| ispartof | Optics letters, 2020-04, Vol.45 (7), p.2054-2057 |
| issn | 0146-9592 1539-4794 |
| language | eng |
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| source | Optica Publishing Group Journals |
| subjects | Conversion Crystal structure Crystal surfaces Crystals Infrared radiation Optical properties Organic crystals Refractivity |
| title | Heterogeneous layered structures for improved terahertz generation |
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