title: Angle-insensitive structural colours based on metallic nanocavities and coloured pixels beyond the diffraction limit.
abstract: To move beyond colorant-based pigmentation display technologies, a variety of photonic and plasmonic crystal based structures have been designed and applied as colour filters. Nanostructure based colour filtering offers increased efficiencies, low power consumption, slim dimensions, and enhanced resolution. However, incident angle tolerance still needs to be improved. In this work, we propose a new scheme through localized resonance in metallic nanoslits by light funneling. Angle insensitive colour filters up to ±80 degrees have been achieved, capable of wide colour tunability across the entire visible band with pixel size beyond the diffraction limit (~λ/2). This work opens the door to angle insensitive manipulation of light with structural filtering.
authors: Department of Electrical Engineering and Computer Science, C-PHOM, The University of Michigan, Ann Arbor, Michigan 48109, USA.
authors: Yi-Kuei Ryan
authors: YK
authors: Wu
authors: Andrew E
authors: AE
authors: Hollowell
authors: Cheng
authors: C
authors: Zhang
authors: L Jay
authors: LJ
authors: Guo
references: Small. 2011 Nov 18;7(22):3128-36
references: 21932283
references: Nano Lett. 2012 Aug 8;12(8):4349-54
references: 22799751
references: Nature. 2007 Jan 4;445(7123):39-46
references: 17203054
references: Nano Lett. 2009 Jul;9(7):2579-83
references: 19527016
references: ACS Nano. 2011 Aug 23;5(8):6578-85
references: 21739951
references: Nature. 2000 Mar 30;404(6777):457
references: 10761905
references: Phys Rev Lett. 2011 Aug 26;107(9):093902
references: 21929243
references: ACS Nano. 2010 Feb 23;4(2):819-32
references: 20092361
references: Nat Commun. 2010 Aug 24;1:59
references: 20975716
references: Nano Lett. 2011 Jul 13;11(7):2590-5
references: 21661733
references: Opt Express. 2007 Nov 12;15(23):15457-63
references: 19550831
references: Phys Rev Lett. 2006 Aug 18;97(7):073901
references: 17026227
references: Nat Nanotechnol. 2012 Sep;7(9):557-61
references: 22886173
references: Phys Rev Lett. 2008 Feb 15;100(6):066408
references: 18352499
references: ACS Nano. 2010 Feb 23;4(2):1241-7
references: 20078118
references: Nano Lett. 2010 Jul 14;10(7):2511-8
references: 20560536
references: Opt Express. 2010 Feb 1;18(3):3035-44
references: 20174134
references: Nat Commun. 2012;3:1108
references: 23047666
references: Nano Lett. 2011 Sep 14;11(9):3557-63
references: 21805967
references: ACS Nano. 2011 Jul 26;5(7):5763-74
references: 21711004
references: Opt Express. 2009 May 11;17(10):8621-9
references: 19434195
references: Proc Natl Acad Sci U S A. 2003 Oct 28;100(22):12576-8
references: 14557541
references: ACS Nano. 2012 Apr 24;6(4):2931-9
references: 22452266
references: Small. 2007 Aug;3(8):1445-51
references: 17583907