Active Optically Controlled Broadband Terahertz Modulator Based on Fe3O4 Nanoparticles
| العنوان: | Active Optically Controlled Broadband Terahertz Modulator Based on Fe3O4 Nanoparticles |
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| المؤلفون: | Hongyu Ji, Jingling Shen, Luyao Xiong, Shu-Li He, Xin Liu, Wei Wang, Bo Zhang |
| المصدر: | IEEE Transactions on Terahertz Science and Technology. 8:535-540 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 010302 applied physics, Radiation, Materials science, Fabrication, Silicon, Terahertz radiation, business.industry, chemistry.chemical_element, 02 engineering and technology, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, law.invention, Amplitude modulation, chemistry, law, Modulation, 0103 physical sciences, Optoelectronics, Electrical and Electronic Engineering, Thin film, 0210 nano-technology, business, Absorption (electromagnetic radiation) |
| الوصف: | We report an active broadband terahertz (THz) modulator based on an Fe3O4 nanoparticle/silicon (Si) structure, where the interface effects were measured in a homemade THz time-domain spectroscopy system. An approximately 100-nm Fe3O4 nanoparticle thin film on the high-resistance Si substrate was easily attained by spin-coating ferrofluids. In our experiment, a modulation depth as high as 92% was achieved at an external laser irradiance of 3.6 W/cm2. This result can be explained by the accumulation of carriers at the interface of the hybrid structure, which induces intense absorption of the THz transmission. In addition, the limit modulated frequency of the device is ∼12 kHz. The superior performance of this device for THz wave modulation in comparison to other nanomaterial-based THz modulators and the ease of fabrication both illustrate that this is a promising method in the modulation of THz transmission. Furthermore, this modulator could also potentially provide an essential component in a wide variety of technologies, such as THz communications, THz imaging, etc. |
| تدمد: | 2156-3446 2156-342X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::0d7e71c3cf276ce45e3896fcd3c96218 https://doi.org/10.1109/tthz.2018.2853991 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........0d7e71c3cf276ce45e3896fcd3c96218 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 21563446 2156342X |
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