Results 291 to 300 of about 1,038,620 (334)

Controlling the Orientation of Polar Axis in Chiral Metal‐Halides to Reveal Their Intrinsic Circularly Polarized Luminescence

Advanced Optical Materials, EarlyView.
In chiral and polar metal‐halide single crystals or thin films, the orientation of the main optical axis normal to incident light allows an easy characterization of the chiroptical properties (circular dichroism and circularly polarized luminescence) without artifacts or macroscopic interferences, despite the highly anisotropic nature in this family of
Kostiantyn Tieriekhov, Maria Maniadi, Olivier Ségut, Sylvie Dabos‐Seignon, Arnaud Brosseau, Valérie Dupray, Nicolas Mercier, Alexandre Abhervé   +7 more
wiley   +1 more source

Extracting mechanical quality factor and eliminating feedthrough using harmonics of thermal-piezoresistive micromechanical resonators. [PDF]

Microsyst Nanoeng
Teng G, Yang C, Quan A, Li C, Li H, Cheng Y, Chang H, Kraft M, Zhang H.   +8 more
europepmc   +1 more source

Chemical Substitution‐Driven Design of a High‐Performance Noncentrosymmetric Bismuth Molybdenum Selenite

Advanced Optical Materials, EarlyView.
The first bismuth molybdenum selenite material with a macroscopic noncentrosymmetric structure is designed using a chemical substitution‐oriented approach and successfully synthesized via a hydrothermal reaction. It exhibits exceptionally well‐balanced nonlinear optical properties, including a s efficiency that is 1.2 times that of KTiOPO4, a suitable ...
Hieu Minh Ngo, Yunseung Kuk, Jihyun Lee, Jiachen Lu, Zhiyong Bai, Chun‐Li Hu, Kang Min Ok   +6 more
wiley   +1 more source

Connectome harmonic decomposition tracks the presence of disconnected consciousness during ketamine-induced unresponsiveness. [PDF]

Br J Anaesth
Van Maldegem M, Vohryzek J, Atasoy S, Alnagger N, Cardone P, Bonhomme V, Vanhaudenhuyse A, Demertzi A, Jaquet O, Bahri MA, Nunez P, Kringelbach ML, Stamatakis EA, Luppi AI.   +13 more
europepmc   +1 more source

Predictive Design to Determine Optimal Absorber Placement in Colloidal Photonic Crystals

Advanced Optical Materials, EarlyView.
The inclusion of absorbing material is known to increase color saturation in photonic crystals. Predictive design based on mathematical structure optimization is used to identify optimal designs for the absorber amount and position within a photonic colloidal crystal and experimentally realized. This strategy shows that the placement of the absorber at
Gudrun Bleyer, Nico Nees, Florian Prohaska, Lukas Pflug, Michael Stingl, Nicolas Vogel   +5 more
wiley   +1 more source

Enabling low Threshold Laser Through an Asymmetric Tetramer Metasurface Harnessing Polarization‐Independent Quasi‐BICs

Advanced Optical Materials, EarlyView.
Light impinging from the left on a metasurface composed by active material. The metasurface shows asymmetric configuration through the non‐uniform presence of holes. The forming quasi‐BICs modes are exploited for lasing purposes. Abstract It is proposed and numerically demonstrated a novel strategy to achieve lasing generation from a dual‐band symmetry‐
Tao Wang, Weizheng Di, W. E. I. Sha, Remo Proietti Zaccaria   +3 more
wiley   +1 more source

Dynamic visualization of brain pulsations using amplified MRI: methodology and applications. [PDF]

Interface Focus
Kumar H, Kurt M, McGeown J, Condron P, Wright J, Maso Talou G, Lee J, Terem I, Danesh-Meyer H, Kwon E, Holdsworth S.   +10 more
europepmc   +1 more source

Large Bidirectional Refractive Index Change in Silicon‐rich Nitride via Visible Light Trimming

Advanced Optical Materials, EarlyView.
Continuous‐wave visible light trimming of PECVD silicon‐rich nitride micro‐ring resonators enables precise, large bidirectional refractive index tuning. Resonance shifts as fine as 10 pm are achieved with a cost‐effective setup, demonstrating large red shifts of 49.1 nm and blue shifts of 10.6 nm.
Dmitrii Belogolovskii, Md Masudur Rahman, Karl Johnson, Vladimir Fedorov, Andrew Grieco, Nikola Alic, Abdoulaye Ndao, Paul K. L. Yu, Yeshaiahu Fainman   +8 more
wiley   +1 more source

2W HBT Power Amplifier Module with Dual Second Harmonic Suppression Technique. [PDF]

Sensors (Basel)
Byeon CW, Kim JH.
europepmc   +1 more source

Colossal Terahertz Emission with Ultrafast Tunability Based on Van der Waals Ferroelectric NbOI2

Advanced Optical Materials, EarlyView.
The widespread THz applications are hindered by the scarcity of efficient ultrafast THz sources with on‐demand fast modulation and easy on‐chip integration capability. Here the discovery of colossal THz emission is reported from a van der Waals (vdW) ferroelectric semiconductor NbOI2 and demonstrates the ultrafast coherent control of the THz emission ...
Sujan Subedi, Wenhao Liu, Wuzhang Fang, Carter Fox, Zixin Zhai, Fan Fei, Yuan Ping, Bing Lv, Jun Xiao   +8 more
wiley   +1 more source