Results 61 to 70 of about 2,043,473 (299)

Probing material absorption and optical nonlinearity of integrated photonic materials

Nature Communications, 2022
Optical absorption and nonlinear index are important performance drivers in devices like microcombs. Here the authors use resonance-enhanced nonlinear spectroscopy to characterize absorption limits and nonlinear index for some integrated photonic ...
Maodong Gao, Qi-Fan Yang, Qing-Xin Ji, Heming Wang, Lue Wu, Boqiang Shen, Junqiu Liu, Guanhao Huang, Lin Chang, Weiqiang Xie, Su-Peng Yu, Scott B. Papp, John E. Bowers, Tobias J. Kippenberg, Kerry J. Vahala   +14 more
doaj   +1 more source

Linear and Nonlinear Optical Properties of Anthocyanin Dye from Red Cabbage in Different pH Solutions

مجلة بغداد للعلوم, 2023
This article studied some linear and nonlinear optical characteristics of different pH solutions from anthocyanin dye extract at 180 oC from red cabbage. First, the linear spectral characteristics, including absorption and transmittance in the range 400-
Rajaa Nader, Slafa I. Ibrahim Ibrahim , Ali H. Al-Hamdani   +2 more
doaj   +1 more source

Nonlinear absorption in dielectric metamaterials

, 2017
We solve the nonlinear Maxwell equations in an InP-based dielectric metamaterial, considering both two-photon absorption and photo-induced free-carrier absorption.
Srini Krishnamurthy (3665128), Brian Slovick (14384658), Lucas Zipp (17500443)   +2 more
core   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Two-photon-induced photoconductivity enhancement in semiconductor microcavities: a theoretical investigation [PDF]

, 2002
We describe a detailed theoretical investigation of two-photon absorption photoconductivity in semiconductor microcavities. We show that high enhancement (by a factor of >10, 000) of the nonlinear response can be obtained as a result of the microcavity ...
Folliot, H., Krug, T., Barry, Liam P., Dunbar, L.A., Hegarty, J., Lynch, Michael, Donegan, John Francis, Bradley, Ann Louise   +7 more
core  

Using pulse transit delay in Z-scan to discriminate between excited-state absorption and other nonlinear processes in ZnO nanocones

, 2014
We report a new approach that uses the single beam Z-scan technique, to discriminate between excited state absorption (ESA) and two and three photon nonlinear absorption.
Shortell, Matthew P., Waclawik, Eric R., Chang, Jin, Jaatinen, Esa A.   +3 more
core   +1 more source

Strong modulation instability in a silicon–organic hybrid slot waveguide [PDF]

, 2015
In this paper, we investigate the strong modulation instability (MI) at telecommunication band in a silicon-organic hybrid slot waveguide. The organic material of polymer poly (bis para-toluene sulfonate) of 2, 4-hexadiyne 1, 6 diol (PTS), which has high
Zhang, Xianting, Yu, Chongxiu, Yan, Binbin, Yuan, Jinhui, Wu, Qiang, Wang, Kuiru, Farrell, Gerald, Sang, Xinzhu, Kang, Zhe   +8 more
core   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

The jump phenomenon effect on the sound absorption of a nonlinear panel absorber and sound transmission loss of a nonlinear panel backed by a cavity

, 2012
Theoretical analysis of the nonlinear vibration effects on the sound absorption of a panel absorber and sound transmission loss of a panel backed by a rectangular cavity is herein presented.
Leung, AYT, Su, RKL, Lee, YY, Li, QS
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source