In this paper, a Tamm plasmons resonance-based sensor is theoretically studied to calculate the salinity of seawater as well as a temperature sensor based on photonic crystals. The transfer matrix method (TMM) is used to systematically study and analyze the reflected s-polarized electromagnetic waves from the sensing structure. The proposed structure composes of prism/Au/water/(Si/SiO2)N/Si. The sensitivity, figure-of-merit, quality factor, and detection limit of the sensors are improved by optimizing the thickness of the seawater layer, incident angle, salinity concentration, and temperature. The proposed salinity sensor records a very high sensitivity of 8.5x104 nm/RIU and quality factor of 3x103, and a very low detection limit of 10-7 nm. Besides, the suggested temperature sensor achieves high sensitivity (from 2.8 nm/˚C to 10.8 nm/˚C), high-quality factor of 3.5x103, and a very low detection limit of 3x10-7 nm. These results indicate that the proposed sensor is a strong candidate for salinity and temperature measurements.

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Posted 10 Mar, 2021
On 30 Jun, 2021
Received 03 Mar, 2021
Invitations sent on 03 Mar, 2021
On 18 Jan, 2021
Posted 10 Mar, 2021
On 30 Jun, 2021
Received 03 Mar, 2021
Invitations sent on 03 Mar, 2021
On 18 Jan, 2021
In this paper, a Tamm plasmons resonance-based sensor is theoretically studied to calculate the salinity of seawater as well as a temperature sensor based on photonic crystals. The transfer matrix method (TMM) is used to systematically study and analyze the reflected s-polarized electromagnetic waves from the sensing structure. The proposed structure composes of prism/Au/water/(Si/SiO2)N/Si. The sensitivity, figure-of-merit, quality factor, and detection limit of the sensors are improved by optimizing the thickness of the seawater layer, incident angle, salinity concentration, and temperature. The proposed salinity sensor records a very high sensitivity of 8.5x104 nm/RIU and quality factor of 3x103, and a very low detection limit of 10-7 nm. Besides, the suggested temperature sensor achieves high sensitivity (from 2.8 nm/˚C to 10.8 nm/˚C), high-quality factor of 3.5x103, and a very low detection limit of 3x10-7 nm. These results indicate that the proposed sensor is a strong candidate for salinity and temperature measurements.

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