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Terahertz-wave generation in quasi-phase-matched GaAs Public Deposited

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  • The authors demonstrate an efficient room temperature source of terahertz radiation using femtosecond laser pulses as a pump and GaAs structures with periodically inverted crystalline orientation, such as diffusion-bonded stacked GaAs and epitaxially grown orientation-patterned GaAs, as a nonlinear optical medium. By changing the GaAs orientation-reversal period (504–1277 μm), or the pump wavelength (2–4.4 μm), we were able to generate narrow-bandwidth (~100 GHz) terahertz wave packets, tunable between 0.9 and 3 THz, with the optical-to-terahertz photon conversion efficiency of 3.3%.
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  • Vodopyanov, K. L., Fejer, M. M., Yu, X., Harris, J. S., Lee, Y., Hurlbut, W., et al. (2006). Terahertz-wave generation in quasi-phase-matched GaAs [Electronic version]. Applied Physics Letters, 89(14).
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  • 89
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