Infrared transparent graphene heater for silicon photonic integrated circuits.
Infrared transparent graphene heater for silicon photonic integrated circuits.
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DOI：
10.1364/oe.24.007871
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发表时间：
2016-04
期刊：
影响因子：
3.8
通讯作者：
D. Schall;M. Mohsin;A. Sagade;M. Otto;B. Chmielak;S. Suckow;A. Giesecke;D. Neumaier;H. Kurz
中科院分区：
文献类型：
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作者：
D. Schall;M. Mohsin;A. Sagade;M. Otto;B. Chmielak;S. Suckow;A. Giesecke;D. Neumaier;H. Kurz
折射率的热光学调谐是集成硅光子电路中用于热稳定、制造公差补偿和光子操作实现的关键操作之一。目前，基于金属线的加热器在硅波导中提供温度控制。然而，金属和光的强相互作用需要在加热器和光子结构之间有一定的间隙，以避免明显的传输损失。在这里，我们提出了一种石墨烯加热器，克服了这一限制，并实现了折射率的节能调谐。我们实现了调谐功率低至每自由光谱范围22 mW和快速响应时间3µs，优于金属波导加热器。模拟结果支持实验结果，并表明石墨烯加热器与硅之间的间距可以进一步减小，从而产生最佳的能源效率和运行速度。
Thermo-optical tuning of the refractive index is one of the pivotal operations performed in integrated silicon photonic circuits for thermal stabilization, compensation of fabrication tolerances, and implementation of photonic operations. Currently, heaters based on metal wires provide the temperature control in the silicon waveguide. The strong interaction of metal and light, however, necessitates a certain gap between the heater and the photonic structure to avoid significant transmission loss. Here we present a graphene heater that overcomes this constraint and enables an energy efficient tuning of the refractive index. We achieve a tuning power as low as 22 mW per free spectral range and fast response time of 3 µs, outperforming metal based waveguide heaters. Simulations support the experimental results and suggest that for graphene heaters the spacing to the silicon can be further reduced yielding the best possible energy efficiency and operation speed.