Coupled tandem cavities based electro-absorption modulator with asymmetric tandem quantum well for high modulation performance at low driving voltage.
Coupled tandem cavities based electro-absorption modulator with asymmetric tandem quantum well for high modulation performance at low driving voltage.
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DOI：
10.1364/oe.21.027924
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发表时间：
2013-11
期刊：
影响因子：
3.8
通讯作者：
B. H. Na;G. Ju;Hee Ju Choi;S. K. Lee;S. Ravindran;Yong-chul Cho;Y. Park;C. Park;Y. T. Lee
中科院分区：
文献类型：
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作者：
B. H. Na;G. Ju;Hee Ju Choi;S. K. Lee;S. Ravindran;Yong-chul Cho;Y. Park;C. Park;Y. T. Lee
我们提出并演示了一种基于耦合串联腔 (CTC) 的新型电吸收调制器 (EAM)，该调制器具有不对称串联量子阱 (ATQW) 结构和分离电极配置，可在低驱动电压下在宽光谱范围内实现大透射率变化，适用于高清 (HD) 3D 成像应用。我们的理论计算表明，具有ATQW结构的CTC可以在低驱动电压下在宽光谱范围内提供大的透射率变化。通过引入分离的电极配置，所制造的具有ATQW结构的CTC的EAM显示出超过50%的大透射率变化，与具有单腔和单厚度量子阱的EAM相比，几乎三倍大的光谱带宽，而无需显着增加施加的电压。此外，采用ATQW结构的CTC还显示出对于具有2mm x 0.5mm大面积的器件而言高达28MHz的高速调制。对于具有 ATQW 的 CTC 的 EAM，这种高透射率变化、大光谱带宽和在大器件面积上的低电压操作表明了它们作为高清 3D 成像应用的光学图像调制器的巨大潜力。
We propose and demonstrate a new electro-absorption modulator (EAM) based on coupled tandem cavities (CTC) having asymmetric tandem quantum well (ATQW) structure with separated electrode configuration to achieve large transmittance change over a broad spectral range at low driving voltage for high definition (HD) 3D imaging applications. Our theoretical calculations show that CTC with ATQW structure can provide large transmittance change over a wide spectral range at low driving voltage. By introducing separated electrode configuration, the fabricated EAM having CTC with ATQW structure shows a large transmittance change over 50%, almost three times larger spectral bandwidth compared to that of EAM having single cavity with a single thickness quantum well without significantly increasing the applied voltage. In addition, the CTC with ATQW structure also shows high speed modulation up to 28 MHz for the device having a large area of 2 mm x 0.5 mm. This high transmittance change, large spectral bandwidth and low voltage operation over a large device area for the EAM having CTC with ATQW demonstrates their huge potential as an optical image modulator for HD 3D imaging applications.