Article
Chemistry, Multidisciplinary
Chaolumen Wu, Qingsong Fan, Wanling Wu, Tian Liang, Yun Liu, Huakang Yu, Yadong Yin
Summary: Integrating plasmonic resonance into photonic bandgap nanostructures allows for additional control over their optical properties. One-dimensional plasmonic photonic crystals with angular dependent structural colors are fabricated by assembling magnetoplasmonic colloidal nanoparticles under a magnetic field. The assembled structures exhibit angular dependent colors based on the activation of optical diffraction and plasmonic scattering.
Article
Chemistry, Multidisciplinary
Eva Arianna Aurelia Pogna, Michele Celebrano, Andrea Mazzanti, Lavinia Ghirardini, Luca Carletti, Giuseppe Marino, Andrea Schirato, Daniele Viola, Paolo Laporta, Costantino De Angelis, Giuseppe Leo, Giulio Cerullo, Marco Finazzi, Giuseppe Della Valle
Summary: Enhancing nonlinear optical effects through nanoscale engineering is a hot research topic. Experimental demonstration of ultrafast all-optical modulation of the second harmonic from a single nanoantenna has the potential to lead to the development of nonlinear nanophotonic devices for a wide range of communication and sensing applications.
Article
Chemistry, Multidisciplinary
Jose Angel Pariente, Farzaneh Bayat, Alvaro Blanco, Antonio Garcia-Martin, Carlos Pecharroman, Manuel I. Marques, Cefe Lopez
Summary: By preparing colloidal crystals with random missing scatterers, crystals are created where disorder is embodied as vacancies in an otherwise perfect lattice. In this system, there is a critical defect concentration where light propagation undergoes a transition from a perfect reflector to an enhanced transmission phenomenon. This behavior can be phenomenologically described in terms of Fano-like resonances.
Article
Chemistry, Multidisciplinary
Patinharekandy Prabhathan, Kandammathe Valiyaveedu Sreekanth, Jinghua Teng, Ranjan Singh
Summary: This study proposes a novel approach to chalcogenide phase change material (PCM)-incorporated steganographic nano-optical coatings (SNOC) for optical steganography. The SNOC design combines a broad-band and a narrow-band absorber made up of PCMs to achieve tunable optical Fano resonance in the visible wavelength, which is a scalable platform for accessing the full-color range. The study demonstrates the dynamic tuning of the Fano resonance line width by switching the structural phase of PCM, providing high-purity colors. For steganography applications, the SNOC cavity layer is divided into an ultralow loss PCM and a high index dielectric material with identical optical thickness, enabling the fabrication of electrically tunable color pixels on a microheater device.
Article
Optics
Mingsen Pan, Aaron Liu, Zhonghe Liu, Weidong Zhou
Summary: In this paper, a fast tunable optical absorber based on the critical coupling of resonance mode and the plasma dispersion effect is proposed. The absorber can switch between perfect absorption and total reflection by modulating the refractive index, and has potential applications in various fields.
Article
Multidisciplinary Sciences
Souvik Biswas, William S. Whitney, Meir Y. Grajower, Kenji Watanabe, Takashi Taniguchi, Hans A. Bechtel, George R. Rossman, Harry A. Atwater
Summary: Black phosphorus offers promise for infrared and visible photonics with the ability to modulate its optical conductivity by tuning the charge density in the induced two-dimensional electron gas. By manipulating the free carrier-dominated intraband response, black phosphorus demonstrates polarization-dependent behavior with moderate doping density. These results suggest new optical functions for emerging photonics applications.
Article
Chemistry, Multidisciplinary
Fantao Meng, Benzhi Ju, Zhenzhi Wang, Ronghui Han, Yuang Zhang, Shufen Zhang, Ping Wu, Bingtao Tang
Summary: We present a new synthetic strategy that combines N-carboxyanhydride (NCA) chemistry and photonic crystals for the fabrication of polypeptide structural color films. Through surface-initiated ring-opening polymerization, a di-NCA derivative of L-cystine (Cys) is utilized to replicate functionalized colloidal crystal templates and create freestanding P(Cys) films with adjustable structural color. The feasibility of producing patterned polypeptide photonic films is demonstrated through template microfabrication. The introduction of L-glutamate (Glu) components enables the P(Cys-co-Glu) copolypeptide films to exhibit visual color responsiveness to pH changes. Additionally, the polypeptide photonic films possess on-demand degradability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Jiannan Gao, Maria Antonietta Vincenti, Jesse Frantz, Anthony Clabeau, Xingdu Qiao, Liang Feng, Michael Scalora, Natalia M. Litchinitser
Summary: This study demonstrates a simple, subwavelength-thick nanostructure that can efficiently convert wavelengths from infrared to ultraviolet in femtosecond timescale. The nanostructure, made of chalcogenide glass, takes advantage of its strong Kerr nonlinearity and high linear refractive index to achieve strong field enhancement at Mie resonances. The output wavelength can be tunable by adjusting input power and delay, without realignment of the system.
Article
Optics
Lucca Kuehner, Fedja J. Wendisch, Alexander A. Antonov, Johannes Buerger, Ludwig Huettenhofer, Leonardo de S. Menezes, Stefan A. Maier, Maxim V. Gorkunov, Yuri Kivshar, Andreas Tittl
Summary: This research introduces a novel nanofabrication approach to effectively control resonance features and nanophotonic functionalities in all-dielectric metasurfaces by unlocking the height of individual resonators. Using this approach, an optical all-dielectric metasurface with maximum intrinsic chirality is demonstrated, which selectively responds to light of a particular circular polarization depending on the structural handedness.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Physical
Enduo Gao, Hongjian Li, Chao Liu, Banxian Ruan, Min Li, Baihui Zhang, Zhenbin Zhang
Summary: This paper presents a dual-band ultra-high absorber composed of graphene strips and nanoribbons, which can dynamically regulate quasi-bound states and Fabry-Perot resonance mode. The absorber demonstrates high modulation depth, low insertion loss, and large dephasing time.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Optics
Guan Wang, Tong Wu, Yabin Shao, Yang Jia, Yang Gao, Yachen Gao
Summary: In this paper, a metal-insulator-metal waveguide structure composed of a hexagonal resonator cavity and a ring with a slit is proposed, and the transmission properties of the structure are studied using the finite difference time domain method. It is found that three distinct plasmon-induced transparency peaks appear in the visible and near-infrared bands with a transmissivity of more than 80%. By adjusting the structure size and using graphene to cover the surface of the cavity, the positions of the transmission peaks can be changed. Based on this effect, an all-optical switcher with ultrafast response and low light absorption is designed, providing a potential solution for the development of visible and near-infrared filters and all-optical switchers.
Article
Chemistry, Multidisciplinary
Isabella De Bellis, Daniele Martella, Camilla Parmeggiani, Diederik Sybolt Wiersma, Sara Nocentini
Summary: This article explores tunable photonic crystals made from elastic polymers that respond to their environment, particularly with physical deformations under temperature changes. The physical structure of these crystals can be adjusted by external temperature variations, resulting in a reversible spectral tuning. By comparing the experimental results with calculations and temperature-induced shape changes, it is confirmed that the observed tuning is due to elastic deformations. The achievement of nanometric patterning of tunable anisotropic photonic materials will contribute to the development of reconfigurable photonic crystals and 4D nanostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Wongi Park, Hyewon Park, Yun-Seok Choi, Dong Ki Yoon
Summary: This study proposes an optical rotation-based color tuning method, which provides a wide range of color tunability using a controlled cholesteric liquid crystal and two polarizers. The color range can be manipulated by engineering the optical rotation of the liquid crystal film, resulting in the attenuation of unexpected light sources and improved visibility.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Michalis Stavrou, Nikolaos Chazapis, Vasileios Arapakis, Vasilios Georgakilas, Stelios Couris
Summary: Hematene and magnetene nanoplatelets were synthesized from hematite and magnetite ores using a green synthesis method and dispersed in water. These non-vdW 2D materials showed strong saturable absorption and Kerr-type nonlinear refractive index, suggesting potential applications in photonics and optoelectronics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Kandammathe Valiyaveedu Sreekanth, Rohit Medwal, Yogesh Kumar Srivastava, Manukumara Manjappa, Rajdeep Singh Rawat, Ranjan Singh
Summary: The study demonstrates dynamic color generation using electrically tunable thin film optical coatings consisting of two different phase change materials. These coatings excite Fano resonance through structural phase switching, covering the entire visible spectrum and showing wide applications in tunable displays and active nanophotonic devices.
