skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Splitting of magnetic dipole modes in anisotropic TiO 2 micro-spheres: Splitting of magnetic dipole modes in anisotropic TiO 2 micro-spheres

Journal Article · · Laser & Photonics Reviews
 [1];  [2];  [3];  [3];  [4];  [4];  [4];  [4];  [5]
  1. King's College London, London (United Kingdom); UCL, London (United Kingdom); ITMO University, St. Petersburg (Russia)
  2. Academy of Sciences of the Czech Republic (ASCR), Prague (Czech Republic). Inst. of Physics
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  4. Univ. of Bordeaux, Pessac (France)
  5. UCL, London (United Kingdom); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Monocrystalline titanium dioxide (TiO2) micro-spheres support two orthogonal magnetic dipole modes at terahertz (THz) frequencies due to strong dielectric anisotropy. For the first time, we experimentally detected the splitting of the first Mie mode in spheres of radii inline imagem through near-field time-domain THz spectroscopy. By fitting the Fano lineshape model to the experimentally obtained spectra of the electric field detected by the sub-wavelength aperture probe, we found that the magnetic dipole resonances in TiO2 spheres have narrow linewidths of only tens of gigahertz. Lastly, anisotropic TiO2 micro-resonators can be used to enhance the interplay of magnetic and electric dipole resonances in the emerging THz all-dielectric metamaterial technology.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1259675
Report Number(s):
SAND-2016-3103J; 637692
Journal Information:
Laser & Photonics Reviews, Journal Name: Laser & Photonics Reviews; ISSN 1863-8880
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (29)

Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy journal July 2015
High-Efficiency Dielectric Huygens’ Surfaces journal February 2015
3  μ m aperture probes for near-field terahertz transmission microscopy journal January 2014
Near-field probing of Mie resonances in single TiO_2 microspheres at terahertz frequencies journal January 2014
Dielectric gradient metasurface optical elements journal July 2014
Dielectric metasurfaces for complete control of phase and polarization with subwavelength spatial resolution and high transmission journal August 2015
Terahertz birefringence for orientation analysis journal January 2009
Substrate-Induced Resonant Magnetoelectric Effects for Dielectric Nanoparticles journal September 2015
Magnetic and electric coherence in forward- and back-scattered electromagnetic waves by a single dielectric subwavelength sphere journal January 2012
Resonant magnetic response of TiO 2 microspheres at terahertz frequencies journal February 2012
Broadband omnidirectional antireflection coating based on subwavelength surface Mie resonators journal January 2012
Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials journal January 2012
The Fano resonance in plasmonic nanostructures and metamaterials journal August 2010
Plasmonic and silicon spherical nanoparticle antireflective coatings journal March 2016
Fabrication and Performance of $\hbox{TiO}_{2}$-Ceramic-Based Metamaterials for Terahertz Frequency Range journal November 2013
All-dielectric metamaterials journal January 2016
Metamaterials and the Landau–Lifshitz permeability argument: Large permittivity begets high-frequency magnetism journal February 2009
Fano Resonances in Terahertz Metasurfaces: A Figure of Merit Optimization journal August 2015
Ultrahigh- Q Fano Resonances in Terahertz Metasurfaces: Strong Influence of Metallic Conductivity at Extremely Low Asymmetry journal December 2015
Interplay of Magnetic Responses in All-Dielectric Oligomers To Realize Magnetic Fano Resonances journal May 2015
Magnetic light journal July 2012
Trapping waves with terahertz metamaterial absorber based on isotropic Mie resonators journal January 2015
Compact Dielectric Particles as a Building Block for Low-Loss Magnetic Metamaterials journal May 2008
Experimental Demonstration of Isotropic Negative Permeability in a Three-Dimensional Dielectric Composite journal July 2008
Mie resonance-based dielectric metamaterials journal December 2009
Realizing Optical Magnetism from Dielectric Metamaterials journal February 2012
Effects of Configuration Interaction on Intensities and Phase Shifts journal December 1961
Magnetic dipole radiation tailored by substrates: numerical investigation journal January 2014
Plasmonic and silicon spherical nanoparticle anti-reflective coatings text January 2015

Cited By (2)