Analysis of Molecular Orientation within Self-Organized Dye Particles with Near-Field and Polarized Evanescent-Field Excited Fluorescence

2006 ◽  
Vol 45 (1B) ◽  
pp. 417-420 ◽  
Author(s):  
Akihiro Tomioka ◽  
Yasuyuki Ido ◽  
Yasuaki Itakura ◽  
Tooru Motokubota
Keyword(s):  
Molecular Orientation ◽  
Near Field ◽  
Evanescent Field ◽  
Self Organized

Near-Field and Polarized Evanescent Field Excited Fluorescence of Self-Organized Particle Arrays of Organic Dye

2006 ◽  
Vol 13 (4) ◽  
pp. 297-301 ◽  
Author(s):  
Akihiro Tomioka ◽  
Sinji Kinosita ◽  
Yasuaki Itakura ◽  
Tooru Motokubota
Keyword(s):  
Near Field ◽  
Evanescent Field ◽  
Organic Dye ◽  
Self Organized

scholarly journals Infrared vibrational nanocrystallography and nanoimaging

2016 ◽  
Vol 2 (10) ◽  
pp. e1601006 ◽  
Author(s):  
Eric A. Muller ◽  
Benjamin Pollard ◽  
Hans A. Bechtel ◽  
Peter van Blerkom ◽  
Markus B. Raschke
Keyword(s):  
Ion Mobility ◽  
Molecular Orientation ◽  
Hybrid Imaging ◽  
Defect Formation ◽  
Near Field ◽  
Molecular Solids ◽  
Optical Antenna ◽  
Molecular Bond ◽  
Low Symmetry ◽  
Insight Into

Molecular solids and polymers can form low-symmetry crystal structures that exhibit anisotropic electron and ion mobility in engineered devices or biological systems. The distribution of molecular orientation and disorder then controls the macroscopic material response, yet it is difficult to image with conventional techniques on the nanoscale. We demonstrated a new form of optical nanocrystallography that combines scattering-type scanning near-field optical microscopy with both optical antenna and tip-selective infrared vibrational spectroscopy. From the symmetry-selective probing of molecular bond orientation with nanometer spatial resolution, we determined crystalline phases and orientation in aggregates and films of the organic electronic material perylenetetracarboxylic dianhydride. Mapping disorder within and between individual nanoscale domains, the correlative hybrid imaging of nanoscale heterogeneity provides insight into defect formation and propagation during growth in functional molecular solids.

Near-Field Magneto-Photoluminescence of Singe Self-Organized Quantum Dots.

2003 ◽  
Vol 794 ◽  
Author(s):  
A. M. Mintairov ◽  
A. S. Vlasov ◽  
J. L. Merz
Keyword(s):  
Quantum Dots ◽  
Near Field ◽  
Energy Shift ◽  
Zeeman Splitting ◽  
Negative Energy ◽  
Zero Magnetic Field ◽  
Bimodal Size Distribution ◽  
Self Organized ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning

ABSTRACTWe present results obtained using low temperature near-field scanning optical microscopy for the measurements of Zeeman splitting and the diamagnetic shift of single self-organized InAs/AlAs, InAs/GaAs and InP/GaInP quantum dots. The measurements allow us to relate the bimodal size distribution of InAs dots with variations in In content. For single InP QDs we observed a strong circular polarization at zero magnetic field accompanied with a negative energy shift, suggesting that strong internal magnetic fields exist in these QDs.

Detection of an evanescent field scattered by silicon tips in an apertureless scanning near-field optical microscope

1999 ◽  
Vol 6 (2) ◽  
pp. 171-178 ◽  
Author(s):  
R. Laddada ◽  
S. Benrezzak ◽  
P. M. Adam ◽  
G. Viardot ◽  
J. L. Bijeon ◽  
...  
Keyword(s):  
Near Field ◽  
Optical Microscope ◽  
Evanescent Field

scholarly journals Self-Organized Conductive Gratings of Au Nanostripe Dimers Enable Tunable Plasmonic Activity

2020 ◽  
Vol 10 (4) ◽  
pp. 1301
Author(s):  
Maria Caterina Giordano ◽  
Matteo Barelli ◽  
Giuseppe Della Valle ◽  
Francesco Buatier de Mongeot
Keyword(s):  
High Efficiency ◽  
Ion Beam ◽  
Near Field ◽  
Cost Effective ◽  
Localized Surface Plasmon ◽  
Large Area ◽  
Field Amplification ◽  
Self Organized ◽  
Broadband Spectrum ◽  
Out Of Plane

Plasmonic metasurfaces based on quasi-one-dimensional (1D) nanostripe arrays are homogeneously prepared over large-area substrates (cm2), exploiting a novel self-organized nanofabrication method. Glass templates are nanopatterned by ion beam-induced anisotropic nanoscale wrinkling, enabling the maskless confinement of quasi-1D arrays of out-of-plane tilted gold nanostripes, behaving as transparent wire-grid polarizer nanoelectrodes. These templates enable the dichroic excitation of localized surface plasmon resonances, easily tunable over a broadband spectrum from the visible to the near- and mid-infrared, by tailoring the nanostripes’ shape and/or changing the illumination conditions. The controlled self-organized method allows the engineering of the nanoantennas’ morphology in the form of Au-SiO2-Au nanostripe dimers, which show hybridized plasmonic resonances with enhanced tunability. Under this condition, superior near-field amplification is achievable for the excitation of the hybridized magnetic dipole mode, as pointed out by numerical simulations. The high efficiency of these plasmonic nanoantennas, combined with the controlled tuning of the resonant response, opens a variety of applications for these cost-effective templates, ranging from biosensing and optical spectroscopies to high-resolution molecular imaging and nonlinear optics.

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