scholarly journals Magnetic Control of Optical Reflectance from Metallic Thin Film Using Surface Plasmon Resonance and Faraday Rotation

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3354
Author(s):  
Changjin Son ◽  
Heongkyu Ju
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Magnetic Fields ◽  
Surface Plasmon ◽  
Faraday Rotation ◽  
Plasmon Resonance ◽  
Incident Angle ◽  
Ferromagnetic Material ◽  
Magnetic Control ◽  
Optical Reflectance

We demonstrate magnetic control of optical reflectance with no ferromagnetic material via combining the Faraday rotation and the surface plasmon resonance (SPR) in a Kretschman configuration under magnetic fields < 0.5 T. The SPR produces the polarization sensitive reflectance from the Au or Ag thin film coated on a N-BK7 prism in which the Faraday rotation occurs. The gold (Au) or silver (Ag) metal film as a plasmonic film somewhat acts as an incident angle-dependent reflection polarizer that can sensitively sense the polarization change induced by the Faraday rotation that occurs in a prism. We find that combination of Faraday rotation and the surface plasmon can induce a significant magnetic modulation of reflectance normalized with respect to that obtained with no magnetic fields at a specific incident angle of light. The magnetic control of optical reflectance presented may find an application in polarizer-free photonic devices with no ferromagnetic material for magneto-optical modulation.

scholarly journals Deteksi Formalin Menggunakan Surface Plasmon Resonance (SPR) Berbasis Nanopartikel Perak sebagai Pengembangan Awal Teknologi Food Safety

2016 ◽  
Vol 3 (02) ◽  
pp. 201
Author(s):  
Muhammad Khoirul Anam ◽  
Risma Narindra ◽  
Thoyibi T ◽  
Kamsul Abraha
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Incident Angle ◽  
Attenuated Total Reflection ◽  
Film System ◽  
Thin Film System ◽  
Nanoparticle System ◽  
Silver Silver

<span>The phenomena of surface plasmon resonance (SPR) has been observed. SPR is reflectance <span>curve as a function of incident angle in Kretschmann configuration. Surface plasmon is elec<span>tromagnetic waves propagation in the interface area between metal and dielectric that can be <span>excited by using attenuated total reflection (ATR) method. The result of experiment explains <span>that the SPR angle on the thin film system of the prism/silver 1 and the prism/silver 2 is (42.8<br /><span>± 0,05)º with the reflectance value 0.32 and 0.44 respectively. On the prism/silver/silver <span>nanoparticle system, it is obtained that SPR angle value is (4,29 ± 0,05) with the reflectance <span>value 0.29 for the silver 1 and 0.31 for the silver 2. After the thin film system is added with <span>40% of formalin, SPR angle becomes (43,0 ± 0,05)º with the reflectance value 0.44. Then, af<span>ter the thin film system is added with 100% of formalin, SPR angle becomes (43,2 ± 0,05)º<br /><span>with the reflectance value 0.4. The shifting SPR angle shows that SPR have capability as <span>formalin sensor.</span></span></span></span></span></span></span></span></span></span></span><br /></span>

scholarly journals Optimization of The Mechanical Drive on Set-up of Homemade Surface Plasmon Resonance

2017 ◽  
Vol 1 (2) ◽  
pp. 108
Author(s):  
Muhammad Arifin ◽  
Febrilian Dwi Laksono ◽  
Supardianningsih Supardianningsih ◽  
Kamsul Abraha
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Total Internal Reflection ◽  
Incident Angle ◽  
Gold Thin Film ◽  
The Difference ◽  
Set Up ◽  
Mechanical Optimization

Mechanical optimization has been done on the surface plasmon resonance (SPR) homemade. At set-up, angle scanning comes a small resolution to detect changes in the thickness of the thin film or refractive index of the sample. The mechanical drive has a function to rotate the prism and detector. Torsional Spring-Loaded Gear Antibacklash is used to improve the accuracy of the mechanical drive. The stepper motor is used to rotate the mechanical drive automatically. The built system has successfully increased the resolution of the prism rotation angle by 0.01°. The test using the blank prism indicates the angle of Total Internal Reflection occurs at an incident angle of 41.80 °. The SPR phenomenon was observed in a thin layer of gold deposited on the prism using a vacuum evaporator. The observed SPR angles on samples A, B, C, D, E, F, G, H and I were 45.02°, 45.05°, 46.30°, 44.48°, 44.70°, 45.49°, 45.52°, 45.66°, and 44.44°, respectively. The SPR angle change shows the difference in the thickness of the gold thin film.

scholarly journals Cellulose and Vanadium Plasmonic Sensor to Measure Ni2+ Ions

2021 ◽  
Vol 11 (7) ◽  
pp. 2963
Author(s):  
Nur Alia Sheh Omar ◽  
Yap Wing Fen ◽  
Irmawati Ramli ◽  
Umi Zulaikha Mohd Azmi ◽  
Hazwani Suhaila Hashim ◽  
...  
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Signal To Noise Ratio ◽  
Affinity Constant ◽  
Detection Accuracy ◽  
Plasmonic Sensor ◽  
Spr Sensor ◽  
Resonance Sensor

A novel vanadium–cellulose composite thin film-based on angular interrogation surface plasmon resonance (SPR) sensor for ppb-level detection of Ni(II) ion was developed. Experimental results show that the sensor has a linear response to the Ni(II) ion concentrations in the range of 2–50 ppb with a determination coefficient (R2) of 0.9910. This SPR sensor can attain a maximum sensitivity (0.068° ppb−1), binding affinity constant (1.819 × 106 M−1), detection accuracy (0.3034 degree−1), and signal-to-noise-ratio (0.0276) for Ni(II) ion detection. The optical properties of thin-film targeting Ni(II) ions in different concentrations were obtained by fitting the SPR reflectance curves using the WinSpall program. All in all, the proposed Au/MPA/V–CNCs–CTA thin-film-based surface plasmon resonance sensor exhibits better sensing performance than the previous film-based sensor and demonstrates a wide and promising technology candidate for environmental monitoring applications in the future.

Optical and surface plasmon resonance sensing properties for chitosan/carboxyl-functionalized graphene quantum dots thin film

Optik ◽  
2019 ◽  
Vol 178 ◽  
pp. 802-812 ◽  
Author(s):  
Nur Syahira Md Ramdzan ◽  
Yap Wing Fen ◽  
Nur Alia Sheh Omar ◽  
Nur Ain Asyiqin Anas ◽  
Wan Mohd Ebtisyam Mustaqim Mohd Daniyal ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Graphene Quantum Dots ◽  
Functionalized Graphene ◽  
Sensing Properties

scholarly journals A Wedge-Shaped Au Thin Film: Integrating Multiple Surface Plasmon Resonance Sensors in a Single Chip and Enhancing the Figure of Merit

2021 ◽  
Vol 3 ◽  
Author(s):  
Hiromasa Shimizu ◽  
Takahiro Ogura ◽  
Takumi Maeda ◽  
Shogo Suzuki
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Figure Of Merit ◽  
Refractive Index Change ◽  
Electron Beam Evaporation ◽  
Attenuated Total Reflection ◽  
Single Chip ◽  
Au Thin Film

We show here the design, fabrication, and characterization of a wedge-shaped Au thin film with an enhanced figure of merit (FOM). This is achieved by using a reflectivity change in an attenuated total reflection (ATR) setup by slightly modulating the wavenumber of the surface plasmon polariton by means of the varying thickness of the Au thin film. The wedge-shaped Au thin film is equivalent to multiple surface plasmon resonance (SPR) transducers integrated in a single chip and was fabricated by an electron-beam evaporation process with the position of the shutter controlled during the deposition. The FOM, defined as the difference between the maximum and minimum values of the normalized reflectivity change (ΔR/R) divided by the corresponding difference of the incident angles, was 8.0-times larger than that based on the reflectivity R. Also, we demonstrated that the wedge-shaped Au thin film was able to detect ethanol gas at a concentration of 0.2%, corresponding to a refractive index change of 2 × 10−5, without any surface functionalization. Since the sensing signal can be obtained with a single image from the wedge-shaped Au thin film without precise thickness control of the metal thickness, no other materials or modulation equipment is necessary, and the sensing chip can be employed in simple and highly sensitive systems.

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