Refractive-Index Profile of Annealed Proton-Exchanged LiTaO3 Channel Waveguides from White-Light Source Measurements

1995 ◽  
Author(s):  
Robert F. Tavlykaev ◽  
David B. Maring ◽  
Ramu V. Ramaswamy
Keyword(s):  
Refractive Index ◽  
Light Source ◽  
White Light ◽  
Refractive Index Profile ◽  
Index Profile ◽  
White Light Source ◽  
Channel Waveguides

scholarly journals Light scattering of glass-particle filled matrices with similar refractive index

2018 ◽  
Vol 52 (30) ◽  
pp. 4231-4246 ◽  
Author(s):  
Wolfgang Wildner ◽  
Dietmar Drummer
Keyword(s):  
Refractive Index ◽  
Light Source ◽  
White Light ◽  
Scattered Light ◽  
Glass Particle ◽  
Refractive Indices ◽  
Mechanical And Thermal Properties ◽  
White Light Source ◽  
Transmission Measurements ◽  
Optical Appearance

If fillers can be added to transparent materials without losing transparency, then advantages like enhanced mechanical and thermal properties can be integrated. The investigated specimens consist of glass particles and refractive index oil as a model for transparent matrices with a very similar refractive index. Their optical properties and resulting limitations are described. Potential uses are also demonstrated by application-oriented optical testing. Besides a standard spectrometer, additional spectrometer setups were used. These include a diffuse as well as a collimated illumination and different sample positioning. Furthermore, the scattered light intensity was measured at different angles. This analysis reveals that composites with smaller particles transmit more light directly. In contrast, standard spectrometers indicate an increasing direct transmittance of composites with larger particles. They collect significant amounts of scattered light and, therefore, are not suitable for transmission measurements of such composites. The different positioning shows that all specimens exhibit very little scattering when placed directly on a diffuse light source. With a greater distance between specimen and light source, the scattering increases strongly. To display the composites' optical appearance, the light-dark-contrast of the diffuse white light source photographed behind the composite was analyzed. Both long and short distances between composite and light source lead to a precise image of the light source. Nevertheless, the white light source appears in the color of the wavelength with matching refractive indices at long distances.

scholarly journals Author Correction: Crystal structure and optical properties of a high-density InGaN nanoumbrella array as a white light source without phosphors

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Tetsuya Kouno ◽  
Masaru Sakai ◽  
Katsumi Kishino ◽  
Akihiko Kikuchi ◽  
Naoki Umehara ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Light Source ◽  
White Light ◽  
High Density ◽  
White Light Source

A Correction to this paper has been published: https://doi.org/10.1038/s41427-021-00298-9

scholarly journals Influence of Rugate Filters on the Spectral Manifestation of Tamm Plasmon Polaritons

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1282
Author(s):  
Victor Reshetnyak ◽  
Igor Pinkevych ◽  
Timothy Bunning ◽  
Dean Evans
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
External Medium ◽  
Metal Layer ◽  
Refractive Index Profile ◽  
Spectral Position ◽  
Index Profile ◽  
Reflection And Transmission ◽  
Rugate Filter ◽  
Plasmon Polaritons

This study theoretically investigated light reflection and transmission in a system composed of a thin metal layer (Ag) adjacent to a rugate filter (RF) having a harmonic refractive index profile. Narrow dips in reflectance and peaks in transmittance in the RF band gap were obtained due to the excitation of a Tamm plasmon polariton (TPP) at the Ag–RF interface. It is shown that the spectral position and magnitude of the TPP dips/peaks in the RF band gap depend on the harmonic profile parameters of the RF refractive index, the metal layer thickness, and the external medium refractive index. The obtained dependences for reflectance and transmittance allow selecting parameters of the system which can be optimized for various applications.

Refractive-index profile of fiber optics

2001 ◽  
Vol 29 (4) ◽  
pp. 252-256 ◽  
Author(s):  
Moataza A. Hindy
Keyword(s):  
Refractive Index ◽  
Fiber Optics ◽  
Refractive Index Profile ◽  
Index Profile
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