We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of...We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a frequency range corresponding to the bandgap of a periodic counterpart with no disorder, indicating the presence of mode localization aided by Bragg scattering. Simulations and experimental measurements provide strong evidence for the spatial localization of the THz laser modes.展开更多
A high repetition rate,picosecond terahertz(THz)parametric amplifier with a LiNbO3(LN)crystai has been demonstrated in this work.At a 10 kHz repetition rate,a peak power of 200 W and an average power of 12 pW have bee...A high repetition rate,picosecond terahertz(THz)parametric amplifier with a LiNbO3(LN)crystai has been demonstrated in this work.At a 10 kHz repetition rate,a peak power of 200 W and an average power of 12 pW have been obtained over a wide range of around 2 THz;at a 100 kHz repetition rate,a maximum peak power of 18 W and an average power of 10.8 pW have been obtained.The parametric gain of the LN crystal was also investigated,and a modified Schwarz-Maier model was introduced to interpret the experimental results.展开更多
基金Ministry of Education-Singapore(MOE)(MOE 2016-T2-1-128)Agency for Science,Technology and Research(A*STAR)(1426500050)+2 种基金National Research Foundation Singapore(NRF)(NRF-CRP18-2017-02)Engineering and Physical Sciences Research Council(EPSRC)(EP/P021859/1)Royal Society and Wolfson Foundation
文摘We demonstrate terahertz(THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a frequency range corresponding to the bandgap of a periodic counterpart with no disorder, indicating the presence of mode localization aided by Bragg scattering. Simulations and experimental measurements provide strong evidence for the spatial localization of the THz laser modes.
基金the National Key Research and Development Program of China(No.2017YFA0701000)the National Natural Science Foundation of China(No.11735002).
文摘A high repetition rate,picosecond terahertz(THz)parametric amplifier with a LiNbO3(LN)crystai has been demonstrated in this work.At a 10 kHz repetition rate,a peak power of 200 W and an average power of 12 pW have been obtained over a wide range of around 2 THz;at a 100 kHz repetition rate,a maximum peak power of 18 W and an average power of 10.8 pW have been obtained.The parametric gain of the LN crystal was also investigated,and a modified Schwarz-Maier model was introduced to interpret the experimental results.
