期刊
ADVANCED OPTICAL MATERIALS
卷 10, 期 19, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202200538
关键词
2D materials; cavity mode modification; nanocavities; quantization
资金
- JSPS [KAKENHI JP20H02558, JP20K15199, JP20J00817, JP20K15137, JP20K15120, JP19K23593, JP18H03864, JP19H00755, JP21H05237, JP21H05232]
- MIC [SCOPE 191503001]
- MEXT [JPMXP09F19UT0075]
- Elemental Strategy Initiative conducted
- MEXT, Japan [JPMXP0112101001]
- JSPS KAKENHI [JP19H05790, JP20H00354, JP21H05233]
- JSPS
- RIKEN Special Postdoctoral Researcher Program
This study presents a carefully designed silicon photonic crystal nanobeam cavity for efficient control through 2D materials and demonstrates giant shifts of the resonant wavelength using few-layer flakes. The study also reveals the independence of the dielectric constant of the flakes on the layer number.
The unique optical properties of 2D layered materials are attractive for achieving increased functionality in integrated photonics. Owing to the van der Waals nature, these materials are ideal for integrating with nanoscale photonic structures. Here a carefully designed air-mode silicon photonic crystal nanobeam cavity for efficient control through 2D materials is reported. By systematically investigating various types and thicknesses of 2D materials, the authors are able to show that enhanced responsivity allows for giant shifts of the resonant wavelength. With atomically precise thickness over a macroscopic area, few-layer flakes give rise to quantization of the mode shifts. The dielectric constant of the flakes is extracted and found to be independent of the layer number down to a monolayer. Flexible reconfiguration of a cavity is demonstrated by stacking and removing ultrathin flakes. With an unconventional cavity design, these results open up new possibilities for photonic devices integrated with 2D materials.
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