期刊
ADVANCED MATERIALS
卷 31, 期 14, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201807981
关键词
2D graphdiyne; Kerr nonlinearity; photonic diode; spatial self-phase modulation
类别
资金
- Science and Technology Development Fund, Macao Special Administration Region (SAR), China [007/2017/A1, 132/2017/A3]
- National Natural Science Foundation of China (NSFC) [61435010, 21773168, 61505117, 11874269, 61875133]
- Science and Technology Innovation Commission of Shenzhen [JCYJ20170302153323978, JCYJ201704101719588539]
- Tianjin Natural Science Foundation [16JCQNJC05000]
- 111 Project of China [B18030]
Graphdiyne is a new carbon allotrope comprising sp- and sp(2)-hybridized carbon atoms arranged in a 2D layered structure. In this contribution, 2D graphdiyne is demonstrated to exhibit a strong light-matter interaction with high stability to achieve a broadband Kerr nonlinear optical response, which is useful for nonreciprocal light propagation in passive photonic diodes. Furthermore, advantage of the unique Kerr nonlinearity of 2D graphdiyne is taken and a nonreciprocal light propagation device is proposed based on the novel similarity comparison method. Graphdiyne has demonstrated a large nonlinear refractive index in the order of approximate to 10(-5) cm(2) W-1, comparing favorably to that of graphene. Based on the strong Kerr nonlinearity of 2D graphdiyne, a nonlinear photonic diode that breaks time-reversal symmetry is demonstrated to realize the unidirectional excitation of Kerr nonlinearity, which can be regarded as a significant demonstration of a graphdiyne-based prototypical application in nonlinear photonics and might suggest an important step toward versatile graphdiyne-based advanced passive photonics devices in the future.
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