Frequency-dependent refractive index of one-dimensionally structured thick metal film

2007 ◽  
Vol 91 (3) ◽  
pp. 031102 ◽  
Author(s):  
Young-Min Shin ◽  
Jin-Kyu So ◽  
Jong-Hyo Won ◽  
Gun-Sik Park
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
Frequency Dependent

scholarly journals Bidirectional Angle-Tolerant Polarization-Tuned Filtering and Wide-Range Refractive Index Sensing Based on Metal Film Coated Nanograting

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Wenli Cui ◽  
Qiannan Wu ◽  
Bo Chen ◽  
Xufeng Li ◽  
Xiaolin Luo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
High Performance ◽  
Incident Angle ◽  
Single Layer ◽  
Transverse Magnetic ◽  
Photonic Devices ◽  
Biomedical Sensors ◽  
Dual Channel ◽  
Wide Range

The miniaturization and integration of photonic devices are new requirements in the fast-growing optics field. In this paper, we focus on a feature-rich sub-wavelength nanograting-coated single-layer metal film. The numerical results show that the reflection behaviors of this proposed structure can realize bidirectional dual-channel ultra-narrowband polarized filtering and bidirectional wavelength-modulated sensing in a wide refractive index (RI) range from 1.0 to 1.4 for incident angle of 10° with transverse-magnetic (TM) polarized illumination at wavelengths between 550 nm to 1500 nm. Moreover, the bidirectional properties of filtering and sensing are not obviously decreased when increasing incident angle from 10° to 30°, and decreasing incident angle from 10° to 0°. The calculated RI sensitivity can be up to 592 nm/RIU with a high figure of merit (FOM) of 179.4 RIU−1. More to the point, this nanograting has a simple structure and is less sensitive to the height and shape of grating ridge, which provides great convenience for the fabrication of devices. The other thing that is going on is that this structure can also realize synchronously tunable color filtering, including green to red, with high color purity in the visible band by choosing the period. The underlying physical mechanism is analyzed in detail, and is primarily attributed to surface plasmon polariton (SPP) resonance and dipole resonance at double plasmon resonance wavelengths. This work has tremendous potential in developing multipurpose and high-performance integrated optical devices such as spectral filters, colored displays and plasmon biomedical sensors.

Ruby laser-induced frequency dependent refractive index change in KCl:Li+ FA crystal

1992 ◽  
Vol 174 (1) ◽  
pp. K39-K42 ◽  
Author(s):  
K.-E. Peiponen ◽  
P. Silfsten ◽  
J. Luostarinen ◽  
E. M. Vartiainen ◽  
P. Ketolainen ◽  
...  
Keyword(s):  
Refractive Index ◽  
Ruby Laser ◽  
Refractive Index Change ◽  
Frequency Dependent ◽  
Index Change

The time-dependent coupled Hartree-Fock approximation

1966 ◽  
Vol 291 (1425) ◽  
pp. 291-295 ◽  
Keyword(s):  
Refractive Index ◽  
Variational Calculation ◽  
Time Dependent ◽  
Electron Systems ◽  
Frequency Dependent ◽  
Hartree Fock ◽  
Helium Gas

A coupled Hartree-Fock approximation for describing the effects of time-dependent perturbations on many-electron systems is presented. It is applied to the calculation of the frequency-dependent refractive index of helium gas with results that differ by between 4 and 8% from the accurate values obtained by a refined variational calculation.

scholarly journals Optical transmission of periodic annular apertures in metal film on high-refractive index substrate: The role of the nanopillar shape

2010 ◽  
Vol 96 (20) ◽  
pp. 201101 ◽  
Author(s):  
J.-S. Bouillard ◽  
J. Einsle ◽  
W. Dickson ◽  
S. G. Rodrigo ◽  
S. Carretero-Palacios ◽  
...  
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
Optical Transmission ◽  
High Refractive Index

scholarly journals A High-Sensitivity SPR Refractive Index Sensor Based on No-Core Fiber with Ag-Cu Composite Films

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7000
Author(s):  
Yuhui Feng ◽  
Hongyu Li ◽  
Shuguang Li ◽  
Yundong Liu ◽  
Xiaojian Meng
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
Control Variable ◽  
Film Deposition ◽  
Refractive Index Sensor ◽  
Multimode Fiber ◽  
Detection Range ◽  
Cu Films ◽  
Core Fiber ◽  
Ag Film

A fiber/Ag-Cu films surface plasmon resonance (SPR) refractive index (RI) sensor composed of multimode fiber-no-core-fiber-multimode fiber (MMF-NCF-MMF) structure is designed. The sensing region length and Cu film deposition time of sensor are gradually optimized by the control variable method, which finally achieves the improvement of sensor properties. We experimentally compared the sensing performance of the fiber/Ag film and fiber/Ag-Cu films sensor. Experimental results show that the fiber/Ag-Cu films sensor has good linearity (R-square = 0.993), and its sensitivity is as high as 3957 nm/RIU in the refractive index detection range of 1.3328–1.3853, which is 1109 nm/RIU higher than the sensitivity of a conventional fiber/Ag film sensor. The sensor presented in this paper adopts the structure with composite metal film, which outperforms the common single-layer metal film in chemical stability such as oxidation resistance and mechanical hardness. Meanwhile, the SPR sensor with MMF-NCF-MMF structure has the advantages of convenient manufacture and compact structure. In conclusion, it can bestow a unique advantage in the field of biological detection or chemical analysis.

Double nanoholes in a metal film as refractive index sensors

2010 ◽  
Author(s):  
Srinivasan Iyer ◽  
Sergei Popov ◽  
Ari T. Friberg
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
Refractive Index Sensors
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