Analysis of slab waveguide discontinuities including radiation and absorption effects

1992 ◽  
Vol 28 (11) ◽  
pp. 1013-1015 ◽  
Author(s):  
J. Gerdes ◽  
B. Lunitz ◽  
D. Benish ◽  
R. Pregla
Keyword(s):  
Slab Waveguide ◽  
Waveguide Discontinuities

Study of the Leakage Loss in a Silica-on-Silicon Slab Waveguide

2003 ◽  
Vol 22 (4) ◽  
pp. 249-261 ◽  
Author(s):  
JUN LU ◽  
SAILING HE ◽  
VLADIMIR ROMANOV
Keyword(s):  
Slab Waveguide ◽  
Leakage Loss ◽  
Silicon Slab

Guided and Leaky Modes of a Multilayer Planar Slab Waveguide

2011 ◽  
Vol 1 (3) ◽  
pp. 14-21 ◽  
Author(s):  
S. K. Raghuwanshi ◽  
V. Kumar ◽  
Radha Raman Pandey
Keyword(s):  
Slab Waveguide ◽  
Leaky Modes

scholarly journals A Nanoplasmonic-Based Biosensing Approach for Wide-Range and Highly Sensitive Detection of Chemicals

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1961
Author(s):  
Francesco Arcadio ◽  
Luigi Zeni ◽  
Aldo Minardo ◽  
Caterina Eramo ◽  
Stefania Di Di Ronza ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Limit Of Detection ◽  
Slab Waveguide ◽  
Grating Pattern ◽  
Transparent Substrate ◽  
Synthetic Receptor ◽  
Sensing Applications ◽  
Wide Range ◽  
Plastic Optical Fibers ◽  
Highly Sensitive Detection

In a specific biosensing application, a nanoplasmonic sensor chip has been tested by an experimental setup based on an aluminum holder and two plastic optical fibers used to illuminate and collect the transmitted light. The studied plasmonic probe is based on gold nanograting, realized on the top of a Poly(methyl methacrylate) (PMMA) chip. The PMMA substrate could be considered as a transparent substrate and, in such a way, it has been already used in previous work. Alternatively, here it is regarded as a slab waveguide. In particular, we have deposited upon the slab surface, covered with a nanograting, a synthetic receptor specific for bovine serum albumin (BSA), to test the proposed biosensing approach. Exploiting this different experimental configuration, we have determined how the orientation of the nanostripes forming the grating pattern, with respect to the direction of the input light (longitudinal or orthogonal), influences the biosensing performances. For example, the best limit of detection (LOD) in the BSA detection that has been obtained is equal to 23 pM. Specifically, the longitudinal configuration is characterized by two observable plasmonic phenomena, each sensitive to a different BSA concentration range, ranging from pM to µM. This aspect plays a key role in several biochemical sensing applications, where a wide working range is required.

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