Sub-Wavelength Grating Lenses With a Twist
Sonny Vo,David A. Fattal,Wayne V. Sorin,Zhen Peng,Tho Tran,Marco Fiorentino,Raymond G. Beausoleil +6 more
TLDR
In this paper, the authors demonstrate a highly efficient, sub-wavelength thick, transmissive grating lens configuration using symmetrical resonant posts to achieve polarization-independent operation, and demonstrate the generation of high-order orbital angular momentum beams and their use in an optical mode-isolator application.Abstract:
Dielectric high-contrast sub-wavelength grating (SWG) structures have received much attention in recent years, offering a new paradigm for the integration of optical systems. Their nanoscale resonant properties can result in a complex and unintuitive far-field behavior that, if carefully crafted, allows the full control of the optical phase front from a thin sub-wavelength planar layer. To date, experimental demonstrations of these new devices have only been realized with polarized light in a reflective mode, greatly limiting their use for practical systems. In this letter, we demonstrate a highly efficient, sub-wavelength thick, transmissive grating lens configuration using symmetrical resonant posts to achieve polarization-independent operation. Our transmissive SWG lenses are easily fabricated using low-cost scalable semiconductor process technology. To illustrate their performance, we demonstrate the generation of high-order orbital angular momentum beams and their use in an optical mode-isolator application that achieves a suppression ratio of over 25 dB.read more
Citations
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Dielectric metasurfaces for complete control of phase and polarization with subwavelength spatial resolution and high transmission
TL;DR: A metasurface platform based on high-contrast dielectric elliptical nanoposts that provides complete control of polarization and phase with subwavelength spatial resolution and an experimentally measured efficiency ranging from 72% to 97%, depending on the exact design.
Journal ArticleDOI
Subwavelength-thick Lenses with High Numerical Apertures and Large Efficiency Based on High Contrast Transmitarrays
TL;DR: P polarization-insensitive, micron-thick, high-contrast transmitarray micro-lenses with focal spots as small as 0.57 λ are reported, thus enabling widespread adoption and a rigorous method for ultrathin lens design is discussed.
Journal ArticleDOI
Recent advances in planar optics: from plasmonic to dielectric metasurfaces
Patrice Genevet,Federico Capasso,Francesco Aieta,Mohammadreza Khorasaninejad,Robert C. Devlin +4 more
TL;DR: In this paper, a classification of metasurfaces based on their different phase mechanisms and profiles and a comparison between plasmonic and dielectric surfaces is presented. And the authors place particular emphasis on the recent developments on electric and magnetic field control of light with Dielectric nanostructures and highlight the physical mechanisms and designs required for efficient all-dielectric metamaterials.
PatentDOI
Achromatic Metasurface Optical Components by Dispersive Phase Compensation
Francesco Aieta,Mikhail A. Kats,Patrice Genevet,Federico Capasso,Mohammadreza Khorasaninejad +4 more
TL;DR: It is shown that chromatic dispersion, or color dependence, can be compensated for by the judicious design of the surface, and an engineered wavelength-dependent phase shift imparted by a metasurface is demonstrated.
Journal ArticleDOI
Multiwavelength Achromatic Metasurfaces by Dispersive Phase Compensation
TL;DR: In this article, a planar lens without chromatic aberrations at three wavelengths is presented, which is based on low-loss dielectric resonators which introduce a dense spectrum of optical modes to enable dispersive phase compensation.
References
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TL;DR: Laser light with a Laguerre-Gaussian amplitude distribution is found to have a well-defined orbital angular momentum and an astigmatic optical system may be used to transform a high-order LaguERre- Gaussian mode into aHigh-order Hermite-Gaussia mode reversibly.
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Stefan W. Hell,Jan Wichmann +1 more
TL;DR: A new type of scanning fluorescence microscope capable of resolving 35 nm in the far field is proposed, overcome the diffraction resolution limit by employing stimulated emission to inhibit the fluorescence process in the outer regions of the excitation point-spread function.
Journal Article
Breaking the diffraction resolution limit by stimulated emission: stimulated-emission-depletion fluorescence microscopy
Stefan W. Hell,Jan Wichmann +1 more
TL;DR: In this paper, the authors proposed a new type of scanning fluorescence microscope capable of resolving 35 nm in the far field by employing stimulated emission to inhibit the fluorescence process in the outer regions of the excitation point spread function.
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TL;DR: In this article, the principles of Optics are discussed and a discussion of the relationship between the principles and the application of Optica Acta is presented. But this discussion is limited.
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Terabit free-space data transmission employing orbital angular momentum multiplexing
Jian Wang,Jian Wang,Jeng-Yuan Yang,Irfan Fazal,Nisar Ahmed,Yan Yan,Hao Huang,Yongxiong Ren,Yang Yue,S. Dolinar,Moshe Tur,Alan E. Willner +11 more
TL;DR: In this paper, the authors demonstrate the ability to multiplex and transfer data between twisted beams of light with different amounts of orbital angular momentum, which provides new opportunities for increasing the data capacity of free-space optical communications links.