PMID- 28522828
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20181120
LR  - 20240326
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 7
IP  - 1
DP  - 2017 May 18
TI  - Efficient Wideband Numerical Simulations for Nanostructures Employing a 
      Drude-Critical Points (DCP) Dispersive Model.
PG  - 2126
LID - 10.1038/s41598-017-02194-1 [doi]
LID - 2126
AB  - A highly efficient numerical approach for simulating the wideband optical 
      response of nano-architectures comprised of Drude-Critical Points (DCP) media 
      (e.g., gold and silver) is proposed and validated through comparing with 
      commercial computational software. The kernel of this algorithm is the subdomain 
      level discontinuous Galerkin time domain (DGTD) method, which can be viewed as a 
      hybrid of the spectral-element time-domain method (SETD) and the finite-element 
      time-domain (FETD) method. An hp-refinement technique is applied to decrease the 
      Degrees-of-Freedom (DoFs) and computational requirements. The collocated E-J 
      scheme facilitates solving the auxiliary equations by converting the inversions 
      of matrices to simpler vector manipulations. A new hybrid time stepping approach, 
      which couples the Runge-Kutta and Newmark methods, is proposed to solve the 
      temporal auxiliary differential equations (ADEs) with a high degree of 
      efficiency. The advantages of this new approach, in terms of computational 
      resource overhead and accuracy, are validated through comparison with well-known 
      commercial software for three diverse cases, which cover both near-field and 
      far-field properties with plane wave and lumped port sources. The presented work 
      provides the missing link between DCP dispersive models and FETD and/or SETD 
      based algorithms. It is a competitive candidate for numerically studying the 
      wideband plasmonic properties of DCP media.
FAU - Ren, Qiang
AU  - Ren Q
AD  - Department of Electrical Engineering, The Pennsylvania State University, 
      University Park, PA, 16802, USA.
FAU - Nagar, Jogender
AU  - Nagar J
AUID- ORCID: 0000-0002-1440-8280
AD  - Department of Electrical Engineering, The Pennsylvania State University, 
      University Park, PA, 16802, USA.
FAU - Kang, Lei
AU  - Kang L
AD  - Department of Electrical Engineering, The Pennsylvania State University, 
      University Park, PA, 16802, USA.
FAU - Bian, Yusheng
AU  - Bian Y
AD  - Department of Electrical Engineering, The Pennsylvania State University, 
      University Park, PA, 16802, USA.
FAU - Werner, Ping
AU  - Werner P
AD  - Department of Electrical Engineering, The Pennsylvania State University, 
      University Park, PA, 16802, USA.
FAU - Werner, Douglas H
AU  - Werner DH
AD  - Department of Electrical Engineering, The Pennsylvania State University, 
      University Park, PA, 16802, USA. dhw@psu.edu.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20170518
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
PMC - PMC5437070
COIS- The authors declare that they have no competing interests.
EDAT- 2017/05/20 06:00
MHDA- 2017/05/20 06:01
PMCR- 2017/05/18
CRDT- 2017/05/20 06:00
PHST- 2017/01/19 00:00 [received]
PHST- 2017/04/10 00:00 [accepted]
PHST- 2017/05/20 06:00 [entrez]
PHST- 2017/05/20 06:00 [pubmed]
PHST- 2017/05/20 06:01 [medline]
PHST- 2017/05/18 00:00 [pmc-release]
AID - 10.1038/s41598-017-02194-1 [pii]
AID - 2194 [pii]
AID - 10.1038/s41598-017-02194-1 [doi]
PST - epublish
SO  - Sci Rep. 2017 May 18;7(1):2126. doi: 10.1038/s41598-017-02194-1.