Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Vyshakh Sanjeev"'
Autor:
Michele Tamagnone, Kundan Chaudhary, Alexander Y. Zhu, Charles Roques-Carmes, Yao-Wei Huang, Cheng-Wei Qiu, Mohammadreza Khorasaninejad, Robert C. Devlin, Zhujun Shi, Vyshakh Sanjeev, Zhao-Wei Ding, Federico Capasso, Wei Ting Chen
Publikováno v:
Nano Letters. 18:2420-2427
In this paper, we report dispersion-engineered metasurfaces with distinct functionalities controlled by wavelength. Unlike previous approaches based on spatial multiplexing or vertical stacking of metasurfaces, we utilize a single phase profile with
Autor:
Aun Zaidi, Zhujun Shi, Wei Ting Chen, Mohammadreza Khorasaninejad, Alexander Y. Zhu, Vyshakh Sanjeev, Federico Capasso
Publikováno v:
Nano Letters. 17:1819-1824
In this Letter, we experimentally report an achromatic metalens (AML) operating over a continuous bandwidth in the visible. This is accomplished via dispersion engineering of dielectric phase shifters: titanium dioxide nanopillars tiled on a dielectr
Autor:
Federico Capasso, Alexander Y. Zhu, C. W. Qiu, Z.W. Ding, Kundan Chaudhary, Wei Ting Chen, Zhujun Shi, Vyshakh Sanjeev, Yao-Wei Huang, Robert C. Devlin, Charles Roques-Carmes, Mohammadreza Khorasaninejad, Michele Tamagnone
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate single-layer metasurfaces with controllable multi-wavelength functions. A multiwavelength achromatic metalens for red, yellow, green and blue light, and metasurfaces generating focused beams with different orbital angular momentum stat
Publikováno v:
Conference on Lasers and Electro-Optics.
We show how to finely tune metasurface dispersion up to 2nd order terms in the visible, using coupled TiO 2 dielectric nano-pillars. We demonstrate white-light imaging and aberration-correction in lenses using these dispersion-engineered metasurfaces
Autor:
Cheng-Wei Qiu, Aun Zaidi, Vyshakh Sanjeev, Mohammadreza Khorasaninejad, Alexander Y. Zhu, Yao-Wei Huang, Federico Capasso, Wei Ting Chen
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate near-unity circular dichroism in planar dielectric nanostructures, with approximately 90% of the incident light of the chosen helicity being transmitted at normal incidence at 540 nm. Such strong intrinsic chiral behavior exists due to
Autor:
Wei Ting Chen, Yao-Wei Huang, Alexander Y. Zhu, Aun Zaidi, Federico Capasso, Vyshakh Sanjeev, Mohammadreza Khorasaninejad, Cheng-Wei Qiu
Publikováno v:
Frontiers in Optics 2017.
We demonstrate near-unity circular dichroism and polarization rotation exceeding 100,000°/mm in planar dielectric nanostructures at visible wavelengths, at normal incidence. Such strong intrinsic chiral behavior exists due to the excitation of giant
Autor:
Federico Capasso, Zhujun Shi, Wei Ting Chen, Vyshakh Sanjeev, Alexander Y. Zhu, Mohammadreza Khorasaninejad
Publikováno v:
Frontiers in Optics 2017.
We report dispersion-tailored metasurfaces in the visible, including an achromatic meta-lens capable of keeping a constant focal length within a continuous bandwidth. The dispersion of meta-lenses can also be tailored with tunable Abbe numbers.
Autor:
Federico Capasso, Aun Zaidi, Wei Ting Chen, Zhujun Shi, Vyshakh Sanjeev, Mohammadreza Khorasaninejad, Alexander Y. Zhu
Publikováno v:
Conference on Lasers and Electro-Optics.
We demonstrate an achromatic metalens with a constant focal length over 60 nm bandwidth (λ= 490 nm to 550 nm). We also design metalenses with reverse chromatic dispersion, opposite of a Fresnel lens.
Autor:
Cheng-Wei Qiu, Yao-Wei Huang, Alexander Y. Zhu, Mohammadreza Khorasaninejad, Wei Ting Chen, Aun Zaidi, Vyshakh Sanjeev, Federico Capasso
Publikováno v:
Light, Science & Applications
The strong optical chirality arising from certain synthetic metamaterials has important and widespread applications in polarization optics, stereochemistry and spintronics. However, these intrinsically chiral metamaterials are restricted to a complic
Autor:
Ahmed, Hammad, Ansari, Muhammad Afnan, Li, Yan, Zentgraf, Thomas, Mehmood, Muhammad Qasim, Chen, Xianzhong
Publikováno v:
Nature Communications; 7/3/2023, Vol. 14 Issue 1, p1-8, 8p