| Autor: |
Boris I. Afinogenov, Seulgi Lee, Lee Sang-Min, Sangwoo Bae, Nikita R. Filatov, Anton N. Sofronov, Minhwan Seo, Maxim Ryabko, Anton Medvedev, Vladimir O. Bessonov, Jeang Eun-Hee, Taehyun Kim, Aleksander S. Shorokhov, I. M. Antropov, Akinori Ohkubo, Ingi Kim, Joo Won-Don |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVII. |
| Popis: |
We demonstrate the broadband visible luminescence from bulk crystalline silicon and silicon nanoparticles sized 100- 30 nm under near-infrared excitation. We show that the luminescence spectrum has two distinct peaks. The first being centered at 550 nm while the second appears close to the wavelength of the second harmonic of the excitation light. The appearance of the second peak is a signature of the highly athermal electron distribution never observed previously. The luminescence intensity and spectral shape strongly depend on the doping type and concentration. Despite being nonresonant, silicon nanoparticles enhance luminescence intensity when placed atop the silicon wafer. The observed phenomenon can be used for wafer inspection and defect detection, as well as for the creation of novel nanosources of light. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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