Terahertz Generation in Lithium Niobate Driven by Ti:Sapphire Laser Pulses and its Limitations
arXiv:1406.4949 · doi:10.1364/OL.39.005403
Abstract
We experimentally investigate the limits to 800 nm-to-terahertz (THz) energy conversion in lithium niobate at room temperature driven by amplified Ti:Sapphire laser pulses with tilted-pulse-front. The influence of the pump central wavelength, pulse duration, and fluence on THz generation is studied. We achieved a high peak efficiency of 0.12% using transform limited 150 fs pulses and observed saturation of the optical to THz conversion efficiency at a fluence of 15 mJ/cm2. We experimentally identify two main limitations for the scaling of optical-to-THz conversion efficiencies: (i) the large spectral broadening of the optical pump spectrum in combination with large angular dispersion of the tilted-pulse-front and (ii) free-carrier absorption of THz radiation due to multi-photon absorption of the 800 nm radiation.
arXiv comment4 pages, 6 figures
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Cited by in corpus (8)
- Theory of THz generation by Optical Rectification using Tilted-Pulse-Fronts
- THz generation using a reflective stair-step echelon
- Scalable terahertz generation by large-area optical rectification at 80 TW laser power
- Terahertz magnetic field enhancement in an asymmetric spiral metamaterial
- 1.4-mJ High Energy Terahertz Radiation from Lithium Niobates
- Transient Work Function Gating: A New Photoemission Regime
- Half-percent terahertz generation efficiency from cryogenically cooled lithium niobate pumped by Ti:sapphire laser pulses
- Chromatic Effect for THz Generation in a Novel Wave-front Tilt Scheme