حسگر دما بر اساس موجبر شکافی پلاسمونی تراهرتز تزویج‌شده به تشدیدگر
الموضوعات :
علیرضا دولت آبادی
1
(دانشكده فنی و مهندسی، دانشگاه آیت الله بروجردی)
الکلمات المفتاحية: ایندیم اَنتیموناید, پلاسمونی, تراهرتز, تشدیدگر, حسگر دما,
ملخص المقالة :
در این مقاله، عملکرد یک حسگر دما بر اساس ساختار پلاسمونی شامل یک موجبر شکافی تزویج‌شده به یک تشدیدگر بررسی شده است. نتایج بر اساس وابستگی معادله پاشندگی ساختار و در نتیجه فرکانس تشدید تشدیدگر به ضریب گذردهی الکتریکی ماده سازنده ساختار یعنی ایندیم اَنتیموناید بهدست آمده که ضریب گذردهی یادشده هم به دمای محیط وابسته است. طراحی ساختار برای بخشی از فرکانسهای طیف تراهرتز انجام شده و نتایج شبیهسازی، بیانگر رابطهای تقریباً خطی بین فرکانسهای تشدید و دمای محیط در بازه دمایی 260 تا 350 درجه کلوین است. همچنین معیاری برای بررسی حساسیت و بازه دمایی عملکردی حسگر ارائه‌‌شده بیان گردیده است. حساسیت این حسگر در بازه دمایی ذکرشده به میزان 10-10× 1 درجه کلوین بر هرتز محاسبه شده و حد تفکیک اندازهگیری دمای آن به حد تفکیک اندازهگیری فرکانس سامانه آشکارساز وابسته است. این حسگر با ساختار ساده خود میتواند در سامانههای متعدد شیمیایی و زیستی بهکار گرفته شود.
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