کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1527934 1511864 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical switching properties of VO2 films driven by using WDM-aligned lasers
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Optical switching properties of VO2 films driven by using WDM-aligned lasers
چکیده انگلیسی
Vanadium dioxide (VO2) film had been demonstrated a high speed IR shutter driven by total optical modulation. However, it usually required a higher power heating laser of high power and precise optical systems to cover the probe beam on the sample with a heating beam of larger area. A new optical system, simply composed of wavelength division multiplexing (WDM), fiber lens or convex lens system, and a glass sheet with VO2 thin film on it, was easily assembled to utilize VO2 film as an IR shutter, implying the possibility to highly miniaturize the VO2-based optical shutter. A permanent low-transmittance (PLT) region forms on the film within the probe beam, resulting in a decrease in average power of the probe beam. Another ring-type switching area (switching ring) forms around the PLT region, resulting in the transmittance switching of the probe beam synchronously with the heating signal. VO2 films can be switched with the highest rate of a continuous square heating signal of 3 mW at 120 kHz. A heating pulse of 0.7 ns and 13 mW can be used to stimulate an IR pulse with fiber lens.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 96, Issues 2–3, 10 April 2006, Pages 331-336
نویسندگان
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