Superresolved optical imaging through higher-order spatial frequency harmonic generation without beating the diffraction limit of light
We proposed a method to achieve superresolved optical imaging without beating the diffraction limit of light. This is achieved by magnifying the ideal optical image of the object through higher-order spatial frequency generation while keeping the size of the effective point spread function of the op...
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Zusammenfassung: | We proposed a method to achieve superresolved optical imaging without beating
the diffraction limit of light. This is achieved by magnifying the ideal
optical image of the object through higher-order spatial frequency generation
while keeping the size of the effective point spread function of the optical
imaging system unchanged. A proof-of-principle experiment was demonstrated in a
modified $4f$-imaging system, where the spatial frequency of a two-line source
was doubled or tripled on the confocal Fourier plane of the $4f$-imaging system
through a light pulse storage and retrieval process based on the
electromagnetically induced transparency effect in a Pr$^{3+}$:$\rm Y_2SiO_5$
crystal, and an originally unresolvable image of the two line sources in the
conventional $4f$-imaging system became resolvable with the spatial frequency
doubling or tripling. Our results offer an original way towards improving
optical imaging resolution without beating the diffraction limit of light,
which is totally different from the existing superresolution methods to
overcome the diffraction limit. |
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DOI: | 10.48550/arxiv.1608.01942 |