Design and characterization of integrated components for SiN photonic quantum circuits.
Design and characterization of integrated components for SiN photonic quantum circuits.
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DOI：
10.1364/oe.24.006843
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发表时间：
2016-03
期刊：
影响因子：
3.8
通讯作者：
M. Poot;C. Schuck;Xiao-song Ma;Xiang Guo;H. Tang
中科院分区：
文献类型：
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作者：
M. Poot;C. Schuck;Xiao-song Ma;Xiang Guo;H. Tang
设计，制造和详细的校准的基本积木走向完全集成的线性光学量子计算进行了讨论。光子器件由氮化硅脊形波导制成，其中对环形谐振器的测量显示出小的传播损耗。定向耦合器被设计成对制造变化不敏感。测量它们的偏移和耦合长度，以及透射光和反射光之间的相位差。通过仔细校准，定向耦合器的插入损耗被发现是小的。最后，集成的受控非电路的特征在于通过输入和输出的不同组合来测量传输。在后选择之后，用该电路进行CNOT操作的门保真度估计为99.81%。这种高保真度归功于我们稳健的设计、良好的制造再现性和广泛的表征。
The design, fabrication, and detailed calibration of essential building blocks towards fully integrated linear-optics quantum computation are discussed. Photonic devices are made from silicon nitride rib waveguides, where measurements on ring resonators show small propagation losses. Directional couplers are designed to be insensitive to fabrication variations. Their offset and coupling lengths are measured, as well as the phase difference between the transmitted and reflected light. With careful calibrations, the insertion loss of the directional couplers is found to be small. Finally, an integrated controlled-NOT circuit is characterized by measuring the transmission through different combinations of inputs and outputs. The gate fidelity for the CNOT operation with this circuit is estimated to be 99.81% after post selection. This high fidelity is due to our robust design, good fabrication reproducibility, and extensive characterizations.