مجله فصل مشترک ها، لایه های نازک و سیستم های با بعد کم
کنترل خواص اپتیکی غیرخطی در نقطه کوانتومی نامتقارن آلاییده توسط جفت شدگی اسپین-مدار راشبا و میدان الکتریکی خارجی
نوع مقاله : مقاله پژوهشی
نویسنده
گروه فیزیک، دانشکده علوم، دانشگاه صنعتی سهند، تبریز، ایران
چکیده
جفت شدگی اسپین-مدار راشبا در نانوساختارها یک پارامتر مهم می باشد و بر روی خواص فیزیک آنها تأثیرگذار است. از اینرو، نشان داده شده است که خواص نوری غیرخطی نقطه کوانتومی از قبیل تولید هماهنگ دوم و یکسوساز نوری می تواند توسط جفت شدگی اسپین-مدار راشبا کنترل شود. همچنین، تأثیر میدان الکتریکی و پتانسیل محبوس سازی نیز بر روی خواص نوری غیرخطی بررسی شده است. مطالعات عددی نشان می دهند که مقدار SHG وقتیکه قدرت جفت شدگی افزایش می یابد، بیشتر می شود، در حالیکه مکان پیک آن جابجا نمی شود. بعلاوه، با افزایش میدان الکتریکی، میزان یکسوسازی نوری نقطه کوانتومی نامتقارن به سمت طول موجهای با انرژیی بیشتر جابجا می شود.
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