Directional THz generation in hot Rb vapor excited to a Rydberg state
| Autor: | Sambit Bikas Pal, Thibault Vogt, Wenhui Li, Martin Kiffner, Mark Lam |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Amplified spontaneous emission
Materials science Atomic Physics (physics.atom-ph) Terahertz radiation Infrared FOS: Physical sciences 02 engineering and technology medicine.disease_cause 01 natural sciences Physics - Atomic Physics law.invention 010309 optics Optical pumping Optics law 0103 physical sciences medicine business.industry 021001 nanoscience & nanotechnology Laser Atomic and Molecular Physics and Optics Excited state Optoelectronics Rydberg state 0210 nano-technology business Ultraviolet |
| Zdroj: | Optics Letters. 46:1017 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.418618 |
| Popis: | We optically excite $^{85}$Rb atoms in a heated vapor cell to a low-lying Rydberg state 10D$_{5/2}$ and observe directional terahertz (THz) beams at 3.3 THz and 7.8 THz. These THz fields are generated by amplified spontaneous emission from the 10D$_{5/2}$ state to the 11P$_{3/2}$ and 8F$_{7/2}$ states, respectively. In addition, we observe ultraviolet (UV) light produced by four-wave mixing of optical pump lasers and the 3.3 THz field. We characterize the generated THz power over the detuning and power of pump lasers, and identify experimental conditions favoring THz and UV generation, respectively. Our scheme paves a new pathway towards generating high-power narrow-band THz radiation. Comment: 5 pages, 4 figures, and 2 tables |
| Databáze: | OpenAIRE |
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