Refractive Index Sensor Based on Terahertz Metamaterial Absorber with High Sensitivity and Quality Factor for Sensing Applications

Öz

This research describes and assesses a terahertz metamaterial absorber (TMA) with a simple and easy-to-produce structure consisting of gold-silicon (optical)-gold design as a refractive index sensing. Due to the high field limitation in the detection regime, electromagnetic (EM) wave’s absorption reaches 99.40% at a frequency of 3.719 THz, including a significant quality factor (Q-Factor) of 65.77 and a figure of merit, FoM, of 21.49. The TMA has an remarkable sensitivity of 1.215 THz/RIU and can be used as a refractive index sensor (RIS). The proposed metamaterial absorber-based sensor is susceptible to refractive index changes (1.00 to 1.05) in the surrounding medium. For the physical absorption mechanism, the fundamental absorption peak is mainly due to the simultaneous occurrence of electric and magnetic dipole resonances. The proposed absorber has the feature of being an excellent RIS due to its sensing and detection applications.

Anahtar Kelimeler

• Absorber
• polarization-independent
• refractive-index
• sensing
• sensor

Algılama Uygulamaları için Yüksek Hassasiyet ve Kalite Faktörüne Sahip Terahertz Metamalzeme Soğurucu Tabanlı Kırılma İndeks Sensörü

Öz

Bu araştırma, kırılma indisi algılaması olarak altın-silikon (optik)-altın tasarımından oluşan basit ve üretimi kolay bir yapıya sahip terahertz metamalzeme soğurucuyu (TMA) tanımlamakta ve değerlendirmektedir. Tespit rejimindeki yüksek alan sınırlaması nedeniyle, elektromanyetik (EM) dalganın emilimi, 65,77'lik önemli bir kalite faktörü (Q-Faktörü) ve 21,49'luk bir başarı rakamı olan FoM dahil olmak üzere, 3,719 THz frekansta %99,40'a ulaşır. TMA, 1,215 THz/RIU'luk makul bir hassasiyet sergileyen bir kırılma indisi sensörü (RIS) olarak kullanılabilir. Metamalzeme soğurucu tabanlı sensör, çevredeki ortamdaki kırılma indisi değişikliklerine (1,00 ila 1,05) karşı hassastır. Soğurma mekanizması için, temel soğurma zirvesi esas olarak elektrik ve manyetik dipol rezonanslarının eşzamanlı oluşumundan kaynaklanmaktadır. Önerilen soğurucu, algılama ve tespit uygulamaları nedeniyle mükemmel bir RIS olma özelliğine sahiptir.

Anahtar Kelimeler

• Soğurucu
• polarizasyon-bağımsız
• kırılma-indeksi
• algılama
• sensör

Kaynakça

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