Sinusoidal Bragg grating based on hybrid metal insulator metal plasmonic waveguide

Micro & nano letters

article

Sindhura Chitimireddy¹  Prateeksha Sharma¹  Dinesh Kumar Vishwakarma¹ 

[1] Discipline of Electronics and Communication Engineering, PDPM Indian Institute of Information Technology

关键词: periodic structures;    Q-factor;    Bragg gratings;    refractive index;    optical waveguides;    microcavities;    optical design techniques;    plasmonics;    MIM devices;    optical filters;    light transmission;    light scattering;    optical losses;    integrated optics;    micro-optics;    optical resonators;    periodic structure;    peak transmission;    hybrid metal insulator metal plasmonic waveguide;    excellent filtering characteristics;    CST microwave studio suite software;    3D sinusoidal Bragg grating;    HMIM plasmonic waveguide;    gradual refractive index change;    passband;    near zero transmission;    rejection band;    scattering losses;    large-scale integration;    microcavity;    narrow resonance wavelength;    quality factor;    defect length;    size 3.784 mum;    size 0.217 mum;    wavelength 1.55 mum;   

DOI  :  10.1049/mnl.2018.5107

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

A direct, sensitive and efficient spectrophotometric method for the determination of nitrofurantoindrug (NIT) in pure as well as in dosage form (capsules) was described. The suggested method wasbased on reduction NIT drug using Zn/HCl and then coupling with 3-methyl-2-benzothiazolinonehydrazone hydrochloride (MBTH) in the presence of ammonium ceric sulfate. Spectrophotometricmeasurement was established by recording the absorbance of the green colored product at 610 nm.Using the optimized reaction conditions, beer’s law was obeyed in the range of 0.5-30 μg/mL, withgood correlation coefficient of 0.9998 and limits of detection and quantitation of 0.163 and 0.544μg/mL, respectively. The accuracy and precision of the proposed method represented by recovery andrelative standard deviation were satisfactory; about 99.33% and 1.16%, respectively. The proposedmethod was applied for determination of NIT in its pharmaceutical forms and the results comparedsuccessfully with those obtained by standard method (British pharmacopeia method).Keywords: Nitrofurantoin , MBTH , Oxidative coupling reaction.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND