Results 41 to 50 of about 1,369 (178)

Achromatic Metalens in the Visible and Metalens with Reverse Chromatic Dispersion

, 2017
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 dielectric spacer layer above a metallic mirror.
Khorasaninejad, M., Shi, Z., Zhu, A. Y., Chen, W. T., Sanjeev, V., Zaidi, A., Capasso, F.   +6 more
openaire   +2 more sources

Photonic crystal fiber metalens [PDF]

Nanophotonics, 2018
Abstract Conventional optical fiber has excellent performance in guiding light, which has been widely employed for long‐distance optical communication. Although the optical fiber is efficient for transmitting light, its functionality is limited by the dielectric properties of the core’s and cladding’s materials (e.g.
Jingyi Yang, Indra Ghimire, Pin Chieh Wu, Sudip Gurung, Catherine Arndt, Din Ping Tsai, Ho Wai Howard Lee   +6 more
openaire   +4 more sources

Die Jekyll‐und‐Hyde‐Natur von Tetrazolen in der Polymerwissenschaft: Von der intrinsischen elektronischen Dualität zur programmierbaren makromolekularen Funktion

Angewandte Chemie, EarlyView.
Ein Heterocyclus – drei elektronische Identitäten. Dieses Minireview zeigt, wie das Substitutionsmuster von Tetrazolen deren Funktion in Polymeren bestimmt und eröffnet substitutionsdefinierte Designprinzipien für funktionelle Polymermaterialien. ZUSAMMENFASSUNG Die Natur vereint Stabilität und Responsivität in einzelnen molekularen Gerüsten und ...
Meryem S. Akdemir, Hatice Mutlu
wiley   +1 more source

Bidirectional Switchable Metalens Based on Phase Change Materials of GST

IEEE Photonics Journal, 2023
Metalens can achieve more challenging functions especially dynamic regulation than traditional lens due to its unprecedented ability to manipulate light. In this paper, an approach to realizing switchable bidirectional metalens is proposed based on phase
Yuke Li, Yuxuan Chen, Zexu Liu, Yipan Lou, Yi Lian, Chang Jiang, Jicheng Wang, Xianqin Li   +7 more
doaj   +1 more source

Giant Phonon‐Enhanced Terahertz Electro‐Optic Response in Ferroelectric van der Waals NbOX2 (X = Br, I)

Laser &Photonics Reviews, EarlyView.
Van der Waals ferroelectric NbOX2 thin films exhibit phonon‐resonance enhanced electro‐optic responses, 332 pm/V at 3.1 THz (NbOI2) and 192 pm/V at 3.7 THz (NbOBr2), the highest among vdW materials, and show 4% non‐resonant SHG modulation together with resonant phonon‐enhancement under a 150 kV/cm THz pump.
Baolong Zhang, Ruihuan Duan, Zheng Liu, Ranjan Singh   +3 more
wiley   +1 more source

Multispectral Chiral Imaging with a Metalens

Nano Letters, 2016
The vast majority of biologically active compounds, ranging from amino acids to essential nutrients such as glucose, possess intrinsic handedness. This in turn gives rise to chiral optical properties that provide a basis for detecting and quantifying enantio-specific concentrations of these molecules.
Khorasaninejad, M., Chen, W. T., Zhu, A. Y., Oh, J., Devlin, R. C., Rousso, D., Capasso, F.   +6 more
openaire   +8 more sources

Metalenses phase characterization by multi-distance phase retrieval

Light: Science & Applications
Metalens, characterized by their unique functions and distinctive physical properties, have gained significant attention for their potential applications.
Bowen Liu, Jialuo Cheng, Maoxiong Zhao, Jin Yao, Xiaoyuan Liu, Shaohu Chen, Lei Shi, Din Ping Tsai, Zihan Geng, Mu Ku Chen   +9 more
doaj   +1 more source

Theoretical Design of a Bionic Spatial 3D-Arrayed Multifocal Metalens

Biomimetics, 2022
With the development of micro/nano-optics, metasurfaces are gaining increasing attention working as novel electromagnetic wave control devices. Among which, metalenses have been developed and applied as a typical application of metasurfaces owing to ...
Guihui Duan, Ce Zhang, Dongsheng Yang, Zhaolong Wang   +3 more
doaj   +1 more source

Bayesian Optimization of Grayscale Patterns for Layer‐Height Accuracy in Projection Multi‐Photon 3D Printing

Laser &Photonics Reviews, EarlyView.
Bayesian optimization combined with in situ quantitative phase imaging enables autonomous correction of layer‐height deviations in projection multi‐photon lithography. By jointly tuning model parameters and grayscale exposure settings, the method achieves more uniform and accurate layers within 300 prints, offering a fast, data‐efficient route to ...
Jason E. Johnson, Xianfan Xu
wiley   +1 more source

Multispectral Concentric Grafted Perfect Vector Vortex Beam

Laser &Photonics Reviews, EarlyView.
Multispectral structured light offers powerful opportunities for increasing information capacity. A multispectral concentric grafted perfect vector vortex beam is proposed to engineer topological charges and polarization. A metasurface can graft different perfect vector vortex beams across concentric spatial regions and extend this concept to ...
Guanchao Wang, Hammad Ahmed, Chunmei Zhang, Yu Wang, Xiuyou Han, Li Li, Xianzhong Chen   +6 more
wiley   +1 more source