interference modulation
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2021 ◽  
Author(s):  
Akiyoshi Tanaka ◽  
Guowei Chen ◽  
Sitong Ye ◽  
Kiichi Niitsu


Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shaobo Li ◽  
Shuming Yang ◽  
Fei Wang ◽  
Qiang Liu ◽  
Biyao Cheng ◽  
...  

Abstract Metallic plasmonic probes have been successfully applied in near-field imaging, nanolithography, and Raman enhanced spectroscopy because of their ability to squeeze light into nanoscale and provide significant electric field enhancement. Most of these probes rely on nanometric alignment of incident beam and resonant structures with limited spectral bandwidth. This paper proposes and experimentally demonstrates an asymmetric fiber tip for broadband interference nanofocusing within its full optical wavelengths (500–800 nm) at the nanotip with 10 nm apex. The asymmetric geometry consisting of two semicircular slits rotates plasmonic polarization and converts the linearly polarized plasmonic mode to the radially polarized plasmonic mode when the linearly polarized beam couples to the optical fiber. The three-dimensional plasmonic modulation induces circumference interference and nanofocus of surface plasmons, which is significantly different from the nanofocusing through plasmon propagation and plasmon evolution. The plasmonic interference modulation provides fundamental insights into the plasmon engineering and has important applications in plasmon nanophotonic technologies.



Author(s):  
В.И. Воловач

Рассмотрены и проанализированы вопросы, связанные с математическим моделированием корреляционных функций и энергетических спектров функции помеховой модуляции. Показано, что при воздействии на сигнал узкополосной мультипликативной помехи в энергетическом спектре функции помеховой модуляции присутствует дискретная составляющая, мощность которой зависит от глубины фазовых искажений. При импульсно-флуктуационной модулирующей помехе с детерминированным тактовым интервалом энергетический спектр функции помеховой модуляции представляет собой сумму непрерывной и дискретной частей. The issues related to mathematical modeling of correlation functions and energy spectra of the noise modulation function are considered and analyzed. It is shown that when a signal is affected by a narrow-band multiplicative interference, a discrete component is present in the energy spectrum of the interference modulation function, the power of which depends on the depth of the phase distortion. In the case of pulse-fluctuating modulating interference with a deterministic clock interval, the energy spectrum of the interference modulation function is the sum of the continuous and discrete parts.



AIP Advances ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 075301
Author(s):  
Yi Luo ◽  
John Luginsland ◽  
Peng Zhang


2020 ◽  
Vol 466 ◽  
pp. 125655
Author(s):  
Jinhong Liu ◽  
Jinze Wu ◽  
Yaodong Hu ◽  
Yu Zhang ◽  
Junxiang Zhang


2018 ◽  
Vol 22 (12) ◽  
pp. 2463-2466 ◽  
Author(s):  
Ningbo Zhang ◽  
Kai Cheng ◽  
Guixia Kang


2017 ◽  
Vol 111 (16) ◽  
pp. 163701 ◽  
Author(s):  
Tao Sun ◽  
Jonathan T. Sutton ◽  
Chanikarn Power ◽  
Yongzhi Zhang ◽  
Eric L. Miller ◽  
...  


2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Rilong Liu

Based on the principle of the Michelson interferometer, the paper briefly describes the theoretical significance and calculates and deduces three expressions of the interference modulation depth. The influence of the surface shape error of plane mirror on modulation depth is analyzed, and the tolerance of error is also pointed out. Moreover, the dependence of modulation depth on the reflectance change of beam splitter interface is also analyzed, and the curve is given. It is concluded that this paper is of general significance for the Fourier transform spectrometer based on the principle of the Michelson two-beam interference.





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