Near-field transmission and reflection spectroscopy for revealing absorption and scattering characteristics of single silver nanoplates

2020 ◽  
Vol 153 (14) ◽  
pp. 144703
Author(s):  
Hidetoshi Mizobata ◽  
Seiju Hasegawa ◽  
Mamoru Tamura ◽  
Takuya Iida ◽  
Kohei Imura
Keyword(s):  
Near Field ◽  
Reflection Spectroscopy ◽  
Silver Nanoplates ◽  
Transmission And Reflection

scholarly journals Сканирующая ближнепольная оптическая наноспектрофотометрия: метод наномасштабного измерения спектров поглощения единичных нанообъектов

2019 ◽  
Vol 45 (4) ◽  
pp. 17
Author(s):  
К.Е. Мoчалов ◽  
Д.О. Соловьева ◽  
И.С. Васкан ◽  
И.Р. Набиев
Keyword(s):  
Experimental Method ◽  
Distinctive Feature ◽  
Total Internal Reflection ◽  
Rhodamine 6G ◽  
Near Field ◽  
Plasmonic Nanoparticles ◽  
Reflection Spectroscopy ◽  
Nanoscale Measurements ◽  
Internal Reflection Spectroscopy ◽  
Rhodamine 6G Dye

AbstractA new experimental method for nanoscale measurements of the absorption spectra of single nanoobjects has been developed based on scanning near-field optical microspectroscopy (SNOM) and nanospectrophotometry (NSP). The main distinctive feature of the proposed SNOM-NSP technique consists in depositing a sample onto a coverglass followed by its probing in the total internal reflection spectroscopy mode. This approach allows the number of analyzed samples to be significantly increased and provides the possibility of combining measurements with other optical techniques. The proposed SNOM-NSP method has been successfully used for studying single plasmonic nanoparticles and their complexes with Rhodamine 6G dye.

scholarly journals Robust tunable plasmon induced transparency in coupled-resonance finite array of metasurface nanostructure

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie-Tao Liu ◽  
Zhi Liu
Keyword(s):  
Optical Transmission ◽  
Near Field ◽  
Real Space ◽  
Far Field ◽  
Geometrical Imperfections ◽  
Explicit Analysis ◽  
Field Radiation ◽  
Induced Transparency ◽  
Transmission And Reflection ◽  
Plasmon Induced Transparency

AbstractRobust and dynamically polarization-controlled tunable plasmon induced transparency (PIT) resonance in designed finite-array nanostructures metasurface is demonstrated, where sharp resonance is guaranteed by design and protected against large geometrical imperfections even for micro-zone sub-array. By employing the explicit analysis of near-field characteristic in the reciprocal-space based on the momentum matching, and the far-field radiation features with point-scattering approach in real-space sparked from Huygens’s principles, the physics of interference resonance for plane-wave optical transmission and reflection of the metasurface is theoretically and thoroughly investigated. The distinctive polarization-selective and Q-tunable PIT shows robust features to performance degradations in traditional PIT system caused by inadvertent fabrication flaws or geometry asymmetry-variations, which paves way for the development of reconfigurable and flexible metasurface and, additionally, opens new avenues in robust and multifunctional controllable nanophotonics device design and applications.

Optical Transmission and Reflection of Nanostructured Cu(In,Ga)Se2 Thin Films Irradiated with Hydrogen Ions

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940027
Author(s):  
A. Mudryi ◽  
O. Borodavchenko ◽  
V. Zhivulko ◽  
M. Yakushev ◽  
M. Sulimov
Keyword(s):  
Thin Films ◽  
Valence Band ◽  
Density Of States ◽  
Optical Transmission ◽  
Antisite Defect ◽  
Hydrogen Ions ◽  
Reflection Spectroscopy ◽  
Defect Complexes ◽  
Nanostructured Thin Films ◽  
Transmission And Reflection

The bandgaps of 1.187[Formula: see text]eV in non-irradiated nanostructured thin films of Cu(In,Ga)Se2 (CIGSe) and of 1.182[Formula: see text]eV in those films irradiated with 10[Formula: see text]keV hydrogen ions were determined using optical transmission and reflection spectroscopy at 4.2[Formula: see text]K. The observed reduction in the bandgap is assigned to the formation of secondary antisite defect complexes inducing band tails of the density of states in the valence band.

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