Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep18181
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Funding
- State Key Program for Basic Research of China [2014CB360505, 2012CB921501]
- National Natural Science Foundation of China [11374224, 11304215, 11474212]
- Natural Science Foundation of Jiangsu Province [BK20130281, BK20141191]
- Program for New Century Excellent Talents in University (NCET)
- Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Hong Kong Research Grant Council [AOE/P-02/12]
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Based on a band engineering method, we propose a theoretical prescription to create a full-k-space flat band in dielectric photonic crystals covering the whole Brillouin Zone. With wave functions distributed in air instead of in the dielectrics, such a flat band represents a unique mechanism for achieving flat dispersions beyond the tight-binding picture, which can enormously reduce the requirement of permittivity contrast in the system. Finally, we propose and numerically demonstrate a unique application based on the full-k-space coverage of the flat band: ultra-sensitive detection of small scatterers.
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