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arXiv 1808.07403physics.opticsphysics.app-ph
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由高阶边带产生的光学频率梳

Optical Frequency Combs from High-Order Sideband Generation

Darren Valovcin, Hunter Banks, Shawn Mack, Arthur Gossard, Kenneth West, Loren Pfeiffer, Mark Sherwin

摘要:

我们报告的产生频率梳最近发现的现象,高阶边带产生(HSG)。具有频率$f_\text{NIR}$的近带隙连续波(cw)激光透射通过包含GaAs/AlGaAs量子阱的外延层,所述GaAs/AlGaAs量子阱由在240和640 GHz之间的频率$f_\text{THz}$下振荡的4和50 kV/cm之间的准cw面内电场$F_\text{THz}$驱动。产生具有在$f_\text{sideband}=f_\text{NIR}+nf_\text{THz}$(甚至是$n$)处的齿的频率梳,具有最大报告的$n>120$,对应于最大梳跨度$>80$ THz。梳状光谱与相同的产品$f_\text{THz}\times F_\text{THz}$被发现在大多数情况下具有相似的跨度和形状,从HSG作为一个散射限制的电子空穴的碰撞现象的图片预期。HSG梳被用来测量我们的太赫兹源的频率和线宽作为潜在的应用示范。

英文摘要:

We report on the generation of frequency combs from the recently-discovered phenomenon of high-order sideband generation (HSG). A near-band gap continuous-wave (cw) laser with frequency $f_\text{NIR}$ was transmitted through an epitaxial layer containing GaAs/AlGaAs quantum wells that were driven by quasi-cw in-plane electric fields $F_\text{THz}$ between 4 and 50 kV/cm oscillating at frequencies $f_\text{THz}$ between 240 and 640 GHz. Frequency combs with teeth at $f_\text{sideband}=f_\text{NIR}+nf_\text{THz}$ ($n$ even) were produced, with maximum reported $n>120$, corresponding to a maximum comb span $>80$ THz. Comb spectra with the identical product $f_\text{THz}\times F_\text{THz}$ were found to have similar spans and shapes in most cases, as expected from the picture of HSG as a scattering-limited electron-hole recollision phenomenon. The HSG combs were used to measure the frequency and linewidth of our THz source as a demonstration of potential applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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