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Simultaneous effects of optical intensity and magnetic field on optical properties of GaN/AlN multi-wells quantum rings with constant outer radius | ||
| Journal of Interfaces, Thin Films, and Low dimensional systems | ||
| دوره 3، شماره 1، اسفند 2019، صفحه 233-243 اصل مقاله (3.9 M) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.22051/jitl.2020.32747.1044 | ||
| نویسنده | ||
| Mehdi Solaimani* | ||
| Department of Physics, Faculty of Science, Qom University of Technology, Qom, Iran | ||
| چکیده | ||
| Here, we study the effect of the optical intensity, external magnetic field, well number and quantum ring thicknesses on the optical absorption of AlN/GaN constant radius multi-wells quantum rings. We show that when the intensity increases, the total absorption coefficient reduces. This fact is independent of the inner quantum ring radius Rin, magnetic field, and number of wells. The total absorption coefficient reduces monotonically when the number of wells increases. However, the system with Rin=400 Å at zero magnetic field is an exception. In this system, if the number of wells increases, the total absorption coefficient firstly decreases and then increases. By increasing Rin, the total absorption coefficient monotonically reduces. This monotonic decreasing behavior exists for systems with more number of wells and higher magnetic fields. At fixed Rin and for systems with greater number of wells and higher values Rin, the total absorption coefficient monotonically decreases when the magnetic field increases. Finally, at lower magnetic fields, the total absorption coefficient decreases more rapidly than in higher magnetic fields. | ||
| کلیدواژه‌ها | ||
| fixed radius multi-wells quantum rings؛ optical absorption coefficients؛ optical intensity؛ magnetic field | ||
| عنوان مقاله [English] | ||
| اثرات همزمان شدت نور و میدان مغناطیسی بر خواص نوری حلقه های نوری چندچاهه GaN/AlN با شعاع خارجی ثابت | ||
| چکیده [English] | ||
| در اینجا، ما شدت نوری، میدان مغناطیسی، تعداد چاه و ضخامت های حلقه کوانتومی روی جذب نوری حلقه های کوانتومی چندچاهه GaN/AlN شعاع ثابت را مطالعه می کنیم. ما نشان می دهیم، هنگامی که شدت افزایش می یابد، ضریب جذب کلی کاهش می یابد. این موضوع به شعاع داخلی حلقه Rin، میدان مغناطیسی و تعداد چاه ها ربطی ندارد. اگر تعداد چاه ها افزایش یابد ضریب جذب کلی کاهش می یابد. در هر صورت، سیستم با °Rin=400 A در میدان مغناطیسی یک استثناء است. در این سیستم، اگر تعداد چاه ها افزایش یابد، ضریب جذب کلی اول کاهش و سپس افزایش می یابد. با افزایش Rin،ضریبجذب کلی بطور یکنوا افزایش می یابد. این رفتار یکنوای کاهشی برای سیستم های با تعداد بیشر چاه و میادین مغناطیسی بیشتر هم صادق است. در Rin ثابت و برای سیستم های با تعداد بیشتر چاه و مقادیر بالاتر Rin ، با افزایش میدان مغناطیسی ضریب جذب کلی بطور یکنواخت کاهش می یابد. نهایتا، در میادین مغناطیسی پایین تر، ضریب جذب کلی، نسبت به میادین مغناطیسی بالاتر، سریعتر کاهش می یابد. | ||
| کلیدواژه‌ها [English] | ||
| حلقه های کوانتومی چندچاهه شعاع ثابت, ضرایب جذب نوری, شدت نوری, میدان مغناطیسی | ||
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