Presentation + Paper
1 April 2020 Single nanoparticle detection in the far field by nonlinear optical method
Author Affiliations +
Abstract
Detection of a single nanoparticle on a bare silicon wafer has been a challenge in the semiconductor industry for decades. Currently, the most successful and widely used technique is dark-field microscopy. However, it is not capable of detecting single sub-10 nm particles owing to a low signal-to-noise ratio (SNR). As a new approach, we suggest using the second harmonic generation (SHG) to detect a single nanoparticle. The second harmonic generation in centrosymmetric materials, like silicon, is forbidden except for a thin and additionally increase local field factors, allowing for their persistent detection. Choosing the proper surface and increasing SNR. We demonstrate the feasibility of the nonlinear dark-field microscopy concept by detecting an isolated 80-nm silicon nanoparticle on the silicon wafer.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
EunHee Jeang, Boris Afinogenov, Sangwoo Bae, TaeHyun Kim, Ingi Kim, Kyunghun Han, Akinori Ohkubo, SangMin Lee, MinHwan Seo, Seulgi Lee, Wondon Joo, Hosun Yoo, Anton Medvedev, Aleksandr Shorokhov, Anton Sofronov, Maksim Riabko, Vladimir Bessonov, and Ilya Antropov "Single nanoparticle detection in the far field by nonlinear optical method", Proc. SPIE 11358, Nonlinear Optics and its Applications 2020, 1135802 (1 April 2020); https://doi.org/10.1117/12.2552708
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KEYWORDS
Nanoparticles

Second-harmonic generation

Silicon

Particles

Polarization

Signal to noise ratio

Signal detection

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