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4 March 2019 Experimental mapping of near-field modes by measuring far- to near-field transmission matrix (Conference Presentation)
Eunsung Seo, Young-Ho Jin, Wonjun Choi, Yonghyeon Jo, Kyung-Deok Song, Joonmo Ahn, Myung-Ki Kim, Wonshik Choi
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Proceedings Volume 10927, Photonic and Phononic Properties of Engineered Nanostructures IX; 109270D (2019) https://doi.org/10.1117/12.2508439
Event: SPIE OPTO, 2019, San Francisco, California, United States
Abstract
Optical modes in subwavelength-scale nanostructures are hard to reach from conventional far-field optics because they mainly exist in the form of near-field. Here, we propose an experimental method that can map out the near-field optical modes of any arbitrary nanostructures. We set up a far- to near-field transmission matrix system by using near-field scanning optical microscope and wavefront shaping of incident wave. By applying the singular value decomposition of the measured transmission matrix, we could identify symmetric and antisymmetric modes of a pair of nano-antenna whose width and separation are well below the diffraction limit. Our method will help designing complex functional nanostructures by providing the experimental means of understanding their optical response.
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Eunsung Seo, Young-Ho Jin, Wonjun Choi, Yonghyeon Jo, Kyung-Deok Song, Joonmo Ahn, Myung-Ki Kim, and Wonshik Choi "Experimental mapping of near-field modes by measuring far- to near-field transmission matrix (Conference Presentation)", Proc. SPIE 10927, Photonic and Phononic Properties of Engineered Nanostructures IX, 109270D (4 March 2019); https://doi.org/10.1117/12.2508439
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KEYWORDS
Near field
Near field scanning optical microscopy
Near field optics
Nanostructures
Diffraction
Optical microscopes
Optical scanning systems
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