Wide-band transmission of nondistorted slow waves in one-dimensional optical superlattices
Wide-band transmission of nondistorted slow waves in one-dimensional optical superlattices
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DOI：
10.1063/1.2209716
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发表时间：
2006-06
影响因子：
4
通讯作者：
M. Ghulinyan;M. Galli;C. Toninelli;J. Bertolotti;S. Gottardo;F. Marabelli;D. Wiersma;Lorenzo Pavesi;L. Andreani
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文献类型：
--
作者：
M. Ghulinyan;M. Galli;C. Toninelli;J. Bertolotti;S. Gottardo;F. Marabelli;D. Wiersma;Lorenzo Pavesi;L. Andreani
设计和生长了几微米厚的一维光学超晶格，其中外部介电层的优化选择允许形成耦合腔态的宽且高传输的微带。在这种结构中，观察到光群速度的降低和传播光信号的线形畸变最小。从相位（白光干涉测量）和时间分辨测量中获得的群速度降低了 5 倍，与通过传输矩阵方法计算的结果相当一致。时间分辨实验证实了 1.8THz 带宽的光脉冲在 λ=1.5μm 波长下的线形失真最小。
Few micron-thick one-dimensional optical superlattices were designed and grown, in which an optimized choice of external dielectric layers allows the formation of a wide and high transmission miniband of coupled cavity states. In such structures a reduction in light group velocity and minimal line shape distortion of propagating optical signal was observed. Group velocity reduction by a factor of 5, obtained both from phase (white-light interferometry) and from time-resolved measurements, is in reasonably good agreement with those calculated through a transfer matrix approach. Time-resolved experiments confirm the minimal line shape distortion for optical pulses of 1.8THz bandwidth at λ=1.5μm wavelength.