Sains Malaysiana 47(10)(2018): 2565–2571

http://dx.doi.org/10.17576/jsm-2018-4710-33

 

Pengoptimuman Sensor Resonans Plasmon Permukaan berdasarkan Kretschmann dengan Kaedah Taguchi

(Optimization of Kretschmann based on Surface Plasmon Resonance Sensor using Taguchi Method)

GAN SIEW MEI, NAJMIAH RADIAH BINTI MOHAMAD, NUR AKMAR BINTI JAMIL, BURHANUDDIN YEOP MAJLIS & P. SUSTHITHA MENON^*

 

Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

Received: 31 March 2018/Accepted: 27 June 2018

 

ABSTRACT

In this paper, Taguchi experimental design technique was applied for optimization of chromium (Cr)/silver (Ag)/indium tin oxide (ITO) SPR sensor for operation in near infrared region. Four factors were considered which include wavelength, thickness of Cr, thickness of Ag, and thickness of ITO. Finite-difference-time-domain (FDTD) method was used in numerical analysis for minimum reflectance (Rmin) and full-width-at-half-maximum (FWHM) performance parameters. The results obtained from the Taguchi method shows that the optimized parameter for Rmin was 785 nm of wavelength, Cr (1 nm), Ag (40 nm) and ITO (20 nm), whereas the optimized parameter for FWHM was 785 of wavelength, Cr (0 nm), Ag (40 nm) and ITO (0 nm). In short, the optimum parameters for achieving the desired performance of sensor were successfully predicted using Taguchi optimization method.

 

Keywords: Indium tin oxide; Kretschmann configuration; silver; surface plasmon resonance; Taguchi method

 

ABSTRAK

Dalam makalah ini, teknik reka bentuk uji kaji Taguchi telah digunakan untuk mengoptimumkan sensor SPR kromium (Cr)/perak (Ag)/indium timah oksida (ITO) untuk operasi berhampiran gelombang inframerah. Empat faktor yang dipilih termasuk panjang gelombang, ketebalan Cr, ketebalan Ag dan ketebalan ITO. Kaedah perbezaan-terhingga-domain-masa (FDTD) digunakan untuk analisis berangka prestasi parameter pantulan minimum (Rmin) dan penuh-lebar-pada-separuh-maksimum (FWHM). Keputusan kajian yang diperoleh daripada kaedah Taguchi menunjukkan bahawa parameter yang dioptimumkan untuk Rmin adalah panjang gelombang (785 nm), Cr (1 nm), Ag (40 nm) dan ITO (20 nm). Manakala parameter yang dioptimumkan untuk FWHM adalah panjang gelombang (785 nm), Cr (0 nm), Ag (40 nm) dan ITO (0 nm). Dengan ini parameter optimum untuk mencapai prestasi sensor yang diingini berjaya diramal menggunakan kaedah pengoptimuman Taguchi.

 

Kata kunci: Indium timah oksida; kaedah Taguchi; perak; resonans plasmon permukaan; tatarajah Kretschmann

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*Corresponding author; email: susi@ukm.edu.my