title: Tailoring dispersion for broadband low-loss optical metamaterials using deep-subwavelength Inclusions.
abstract: Metamaterials have the potential to create optical devices with new and diverse functionalities based on novel wave phenomena. Most practical optical systems require that the device properties be tightly controlled over a broad wavelength range. However, optical metamaterials are inherently dispersive, which limits operational bandwidths and leads to high absorption losses. Here, we show that deep-subwavelength inclusions can controllably tailor the dispersive properties of an established metamaterial structure thereby producing a broadband low-loss optical device with a desired response. We experimentally verify this by optimizing an array of nano-notch inclusions, which perturb the mode patterns and strength of the primary and secondary fishnet nanostructure resonances and give an optically thin mid-wave-infrared filter with a broad transmissive pass-band and near-constant group delay. This work outlines a powerful new strategy for realizing a wide range of broadband optical devices that exploit the unique properties of metamaterials.
authors.affiliation: Department of Electrical Engineering and Center for Nanoscale Science, The Pennsylvania State University, 121 Electrical Engineering East, University Park, PA 16802, United States.
authors.forename: Zhi Hao
authors.initials: ZH
authors.lastname: Jiang
authors.forename: Seokho
authors.initials: S
authors.lastname: Yun
authors.forename: Lan
authors.initials: L
authors.lastname: Lin
authors.forename: Jeremy A
authors.initials: JA
authors.lastname: Bossard
authors.forename: Douglas H
authors.initials: DH
authors.lastname: Werner
authors.forename: Theresa S
authors.initials: TS
authors.lastname: Mayer
references.citation: ACS Nano. 2012 May 22;6(5):4475-82
references.pmid: 22530626
references.citation: Science. 2010 Apr 30;328(5978):582-3
references.pmid: 20431006
references.citation: Science. 2009 Jan 16;323(5912):366-9
references.pmid: 19150842
references.citation: Phys Rev Lett. 2002 Nov 18;89(21):213902
references.pmid: 12443413
references.citation: Nature. 2008 Sep 18;455(7211):376-9
references.pmid: 18690249
references.citation: Adv Mater. 2010 Jun 4;22(21):2354-7
references.pmid: 20352634
references.citation: Nat Mater. 2008 Jan;7(1):31-7
references.pmid: 18059275
references.citation: Science. 2006 May 12;312(5775):892-4
references.pmid: 16690860
references.citation: Phys Rev Lett. 2008 Jan 25;100(3):033903
references.pmid: 18232982
references.citation: Nat Commun. 2010 Nov 23;1:124
references.pmid: 21119637
references.citation: Nat Mater. 2009 Sep;8(9):758-62
references.pmid: 19578334
references.citation: Phys Rev Lett. 2004 Sep 3;93(10):107402
references.pmid: 15447450
references.citation: Phys Rev Lett. 2008 May 23;100(20):207402
references.pmid: 18518577
references.citation: Science. 2006 Nov 10;314(5801):977-80
references.pmid: 17053110
references.citation: Phys Rev Lett. 2009 Mar 6;102(9):093903
references.pmid: 19392520
references.citation: Nat Nanotechnol. 2011 Jun 05;6(7):402-7
references.pmid: 21642984
references.citation: Nature. 2011 Feb 17;470(7334):369-73
references.pmid: 21331038
references.citation: Nano Lett. 2011 Jun 8;11(6):2329-33
references.pmid: 21528909
references.citation: ACS Nano. 2011 Jun 28;5(6):4641-7
references.pmid: 21456579
references.citation: Phys Rev Lett. 2004 Mar 19;92(11):117403
references.pmid: 15089166
references.citation: Nat Mater. 2011 Mar;10(3):216-22
references.pmid: 21278741
references.citation: Nat Mater. 2009 Jul;8(7):568-71
references.pmid: 19404237
references.citation: Opt Express. 2013 Feb 11;21(3):3872-84
references.pmid: 23481843
references.citation: Nat Commun. 2010 Aug 24;1:59
references.pmid: 20975716
references.citation: Nat Mater. 2010 Feb;9(2):129-32
references.pmid: 20023631
references.citation: Nat Commun. 2012 May 29;3:870
references.pmid: 22643897
references.citation: Science. 2009 Sep 18;325(5947):1513-5
references.pmid: 19696310
references.citation: Opt Lett. 2007 Jan 1;32(1):53-5
references.pmid: 17167581
references.citation: Science. 2001 Apr 6;292(5514):77-9
references.pmid: 11292865
references.citation: Phys Rev Lett. 2011 Jul 22;107(4):045901
references.pmid: 21867022
references.citation: Nature. 2010 Aug 5;466(7307):735-8
references.pmid: 20686570
references.citation: Phys Rev Lett. 2011 Jul 22;107(4):043903
references.pmid: 21867008
references.citation: Phys Rev Lett. 2005 Sep 23;95(13):137404
references.pmid: 16197179
references.citation: Phys Rev Lett. 2008 Jul 25;101(4):047401
references.pmid: 18764363
references.citation: Science. 2005 Apr 22;308(5721):534-7
references.pmid: 15845849