期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.107404
关键词
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资金
- Physical Behavior of Materials Program, Office of Basic Energy Sciences, U.S. Department of Energy [DE-SC0007043]
- Atomic, Molecular and Optical Sciences Program, Office of Basic Energy Sciences, U.S. Department of Energy [DE-FG02-01ER15213]
- U.S. Department of Energy (DOE) [DE-FG02-01ER15213, DE-SC0007043] Funding Source: U.S. Department of Energy (DOE)
From the fundamental principle of causality we show that epsilon-near-zero (ENZ) materials with a very low (asymptotically zero) intrinsic dielectric loss do necessarily possess a very low (asymptotically zero) group velocity of electromagnetic wave propagation. This leads to the loss function being singular and causes high nonradiative damping of the optical resonators and emitters (plasmonic nanoparticles, quantum dots, chromophore molecules) embedded into them or placed at their surfaces. Rough ENZ surfaces do not exhibit hot spots of local fields suggesting that surface modes are overdamped. Reflectors and waveguides also show very large losses both for realistic and idealized ENZ materials.
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