Superresolution in total internal reflection tomography

Belkebir, Kamal; Chaumet, Patrick C.; Sentenac, Anne

doi:10.1364/josaa.22.001889

Cited by 112 publications

(81 citation statements)

References 31 publications

(48 reference statements)

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“…Recently, it has been studied with the goal of breaking the diffraction limit in far-field optical imaging 67,68,[81][82][83] . The resolution is improved by measurements at many incident angles that enlarge the accessible range of spatial frequencies.…”

Section: Extraordinary Imaging Properties Of the Hyperbolic Metalensmentioning

confidence: 99%

Hyperlenses and metalenses for far-field super-resolution imaging

2012

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The resolution of conventional optical lens systems is always hampered by the diffraction limit. Recent developments in artificial metamaterials provide new avenues to build hyperlenses and metalenses that are able to image beyond the diffraction limit. Hyperlenses project super-resolution information to the far field through a magnification mechanism, whereas metalenses not only super-resolve subwavelength details but also enable optical Fourier transforms. Recently, there have been numerous designs for hyperlenses and metalenses, bringing fresh theoretical and experimental advances, though future directions and challenges remain to be overcome.O ptical microscopy has revolutionized many fields such as microelectronics, biology and medicine. However, the resolution of a conventional optical lens system is always limited by diffraction to about half the wavelength of light. This diffraction barrier arises from the fact that subwavelength information from an object is carried by high spatial-frequency evanescent waves, which only exist in the near field. To overcome this diffraction limit, pioneering work has been carried out, including near-field scanning microscopy 1 , as well as fluorescence-based imaging methods 2,3 . These scanning-or random sampling-based nonprojection techniques achieve super-resolving power by sacrificing imaging speed, making them uncompetitive for dynamic imaging.Lens-based projection imaging remains the best option for high-speed microscopy. Immersion techniques have been proposed to enhance resolution, but they are limited by the low refractive indices of natural materials 4 . Emerging within the last decade, the fields of plasmonics and metamaterials provide solutions for engineering extraordinary material properties not found in nature, such as negative index of refraction 5,6 or strongly anisotropic materials 7,8 . This has provided tremendous opportunities for novel lens designs with unprecedented resolution 9 . Initiated by Pendry's seminal concept of the perfect lens 10 , a number of superlenses were demonstrated with resolving powers beyond the diffraction limit [11][12][13][14][15][16][17] . The optical superlens first achieved sub-diffraction-limited resolution by enhancing evanescent waves through a slab of silver 11 . As the evanescent-field enhancement is enabled by surface plasmon excitation, the subwavelength image is typically limited to the near field of the metal slab. However, the hyperlens-a metamaterial-based lens-can send super-resolution images into the far field by introducing a magnification mechanism. This has been considered as one of the most promising candidates for practical applications since its first demonstration in 2007 (refs 13,14). Recently, various other metamaterial-based lenses, that is, metalenses, have also been developed with both

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Section: Extraordinary Imaging Properties Of the Hyperbolic Metalensmentioning

confidence: 99%

Hyperlenses and metalenses for far-field super-resolution imaging

2012

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“…In order to further improve the images, a possible approach would be to make use of constraint deconvolution, which has been successfully implemented for holographic [34] and tomographic microscopy with 1D illumination scanning [24][25][26]. More elaborate reconstruction algorithms may also be used for highly contrasted specimens [35,36]. Note also that, when a priori information can be introduced in the inversion algorithm, the resolution of the reconstruction can be much better than that imposed by the diffraction limit, even for weakly diffracting specimen [37,38].…”

Section: Simulationsmentioning

confidence: 99%

Improved and isotropic resolution in tomographic diffractive microscopy combining sample and illumination rotation

et al. 2011

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Abstract:Tomographic Diffractive Microscopy is a technique, which permits to image transparent living specimens in three dimensions without staining. It is commonly implemented in two configurations, by either rotating the sample illumination keeping the specimen fixed, or by rotating the sample using a fixed illumination. Under the first-order Born approximation, the volume of the frequency domain that can be mapped with the rotating illumination method has the shape of a "doughnut", which exhibits a so-called "missing cone" of non-captured frequencies, responsible for the strong resolution anisotropy characteristic of transmission microscopes. When rotating the sample, the resolution is almost isotropic, but the set of captured frequencies still exhibits a missing part, the shape of which resembles that of an apple core. Furthermore, its maximal extension is reduced compared to tomography with rotating illumination. We propose various configurations for tomographic diffractive microscopy, which combine both approaches, and aim at obtaining a high and isotropic resolution. We illustrate with simulations the expected imaging performances of these configurations. 42.30.-d, 42.40.-i, 42.90.+m PACS (2008):

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“…The amplitude and phase in the far field are recorded, enabling computed tomography of the field at the surface [6][7][8]. Far-field optical diffraction tomography (FFODT) removes traditional constraints on resolution such as numerical aperture by utilizing strong coupling between evanescent and propagating waves.…”

Section: Introductionmentioning

confidence: 99%

Stacked dielectric gratings for sub-wavelength surface field synthesis

et al. 2010

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A method is developed to enhance the amplitudes of the non-propagating evanescent orders of resonant dielectric gratings. The origin of these resonances is analyzed in detail. The method relies on interactions between stacked gratings with different periods, and so a formalism is developed to model such stacks mathematically. In addition, a theoretical approach is developed to design gratings that enhance or blaze desired orders. These orders, controlled independently by incident fields from different angles, interfere and are optimized to produce steerable sub-Rayleigh field concentrations on a surface. These spots may function as a virtual scanning probe for non-invasive sub-Rayleigh microscopy. Optimization is conducted using a Monte Carlo Markov chain, and spots are generated which are both 1 order of magnitude narrower than the free space Rayleigh limit and robust to noise in the incident fields.

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Superresolution in total internal reflection tomography

Cited by 112 publications

References 31 publications

Hyperlenses and metalenses for far-field super-resolution imaging

Hyperlenses and metalenses for far-field super-resolution imaging

Improved and isotropic resolution in tomographic diffractive microscopy combining sample and illumination rotation

Stacked dielectric gratings for sub-wavelength surface field synthesis

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