title: Enhancement of polarizabilities of cylinders with cylinder-slab resonances.
abstract: If an object is very small in size compared with the wavelength of light, it does not scatter light efficiently. It is hence difficult to detect a very small object with light. We show using analytic theory as well as full wave numerical calculation that the effective polarizability of a small cylinder can be greatly enhanced by coupling it with a superlens type metamaterial slab. This kind of enhancement is not due to the individual resonance effect of the metamaterial slab, nor due to that of the object, but is caused by a collective resonant mode between the cylinder and the slab. We show that this type of particle-slab resonance which makes a small two-dimensional object much "brighter" is actually closely related to the reverse effect known in the literature as "cloaking by anomalous resonance" which can make a small cylinder undetectable. We also show that the enhancement of polarizability can lead to strongly enhanced electromagnetic forces that can be attractive or repulsive, depending on the material properties of the cylinder.
authors: Department of Physics and Institute for Advanced Study, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors: Meng
authors: M
authors: Xiao
authors: Department of Physics and Institute for Advanced Study, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors: Xueqin
authors: X
authors: Huang
authors: National Laboratory of Solid State Microstructures &Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China.
authors: H
authors: H
authors: Liu
authors: Department of Physics and Institute for Advanced Study, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors: C T
authors: CT
authors: Chan
references: Science. 2001 Apr 6;292(5514):77-9
references: 11292865
references: Phys Rev Lett. 2003 Sep 26;91(13):133901
references: 14525303
references: Nat Mater. 2012 Jun 21;11(7):573-84
references: 22717488
references: Nat Mater. 2010 May;9(5):387-96
references: 20414221
references: Opt Express. 2007 May 14;15(10):6314-23
references: 19546935
references: Phys Rev Lett. 2000 Oct 30;85(18):3966-9
references: 11041972
references: Phys Rev Lett. 2009 Nov 6;103(19):194801
references: 20365927
references: Nat Mater. 2010 Mar;9(3):205-13
references: 20168344
references: Science. 2011 Oct 21;334(6054):333-7
references: 21885733
references: J Opt Soc Am A Opt Image Sci Vis. 2014 Sep 1;31(9):1984-92
references: 25401438
references: Nat Mater. 2010 Mar;9(3):193-204
references: 20168343
references: Nat Commun. 2014 Mar 06;5:3307
references: 24598792
references: J Phys Condens Matter. 2009 Aug 12;21(32):325301
references: 21693964
references: Science. 2003 Nov 28;302(5650):1537-40
references: 14645840
references: Opt Lett. 2012 Nov 15;37(22):4594-6
references: 23164849
references: Nat Mater. 2012 Apr 01;11(5):426-31
references: 22466746