论文信息 - Tunable terahertz generation using femtosecond pulse shaping

Tunable terahertz generation using femtosecond pulse shaping

Femtosecond pulse shaping and photomixing methods are combined to make a tunable terahertz source. Grating-pair pulse shaper selects two main frequency components to produce pulses that are modulated with a period which is inversely proportional to the frequency separation. The shaped pulse is then photomixed in semi-insulating GaAs under external bias. Terahertz (THz) emission frequency follows the modulation frequency of the excitation pulses, from 0.5 to 3 THz. Contrary to cw photomixing, this method can easily be combined with electro-optic and photoconductive sampling detection methods.

[1] Andrew M. Weiner,et al. High-resolution femtosecond pulse shaping , 1988 .

[2] M. Nuss,et al. Subpicosecond photoconducting dipole antennas , 1988 .

[3] J. Gordon,et al. Terahertz time‐domain measurement of the conductivity and superconducting band gap in niobium , 1991 .

[4] Levi,et al. Optical rectification at semiconductor surfaces. , 1992, Physical review letters.

[5] X. Zhang,et al. Ultrafast electro-optic field sensors , 1996 .

[6] X. Zhang,et al. 7 terahertz broadband GaP electro-optic sensor , 1997 .

[7] Coherent generation of tunable, narrow-band THz radiation by optical rectification of femtosecond pulse trains , 1997 .

[8] Simon Verghese,et al. Highly tunable fiber-coupled photomixers with coherent terahertz output power , 1997 .

[9] W. DiNatale,et al. Generation and detection of coherent terahertz waves using two photomixers , 1998 .

[10] Elliott R. Brown,et al. A photoconductive model for superior GaAs THz photomixers , 1999 .

[11] F. Tauser,et al. Generation and field-resolved detection of femtosecond electromagnetic pulses tunable up to 41 THz , 2000 .

[12] Andreas Stintz,et al. LASERS, OPTICS, AND OPTOELECTRONICS 2819 Transform-limited, narrow-linewidth, terahertz-wave parametric generator , 2001 .

[13] Almantas Galvanauskas,et al. Tunable narrow-band terahertz generation from periodically poled lithium niobate , 2001, QELS 2001.