Results 111 to 120 of about 2,978,769 (241)

Room temperature terahertz semiconductor frequency comb

Nature Communications, 2019
Terahertz frequency combs are highly desired for applications in precision measurements, sensing, spectroscopy and metrology. Here the authors demonstrate the room-temperature chip-based THz frequency comb using nonlinear frequency generation from a mid ...
Quanyong Lu, Feihu Wang, Donghai Wu, Steven Slivken, Manijeh Razeghi   +4 more
doaj   +1 more source

Integrated frequency comb source based Hilbert transformer for wideband microwave photonic phase analysis

, 2015
We demonstrate a photonic RF Hilbert transformer for broadband microwave in-phase and quadrature-phase generation based on an integrated frequency optical comb, generated using a nonlinear microring resonator based on a CMOS compatible, high-index ...
Mitchell, Arnan, Morandotti, Roberto, Shoeiby, Mehrdad, Chu, Sai T., Moss, David J., Little, Brent E., Nguyen, Thach G.   +6 more
core   +1 more source

Advances in Unraveling the Structure and Sodium‐Ion Storage Behaviors of Hard Carbons: From Basic to Extended Characterization Techniques

Carbon Energy, EarlyView.
This review is devoted to introducing the structures and sodium storage mechanisms of hard carbon materials and analyzing the correlated advanced characterization techniques. The advanced characterization techniques are categorized based on the classification of signal sources.
Jiechang Gao, Dongqi Zhang, Guanglei Qiu, Ye Han, Haijun Zhang, Yajie Liu, Zhixin Tai   +6 more
wiley   +1 more source

Electrical feedthrough governs symmetry of phononic frequency combs in MEMS resonators

Microsystems & Nanoengineering
Understanding parasitic electrical feedthrough in microelectromechanical (MEMS) resonators is essential for controlling nonlinear spectral phenomena.
Hongyu Chen, Yangyang Guan, Dongyang Chen, Zunhao Xiao, Ronghua Huan, Yuan Wang, Chen Wang, Jin Xie   +7 more
doaj   +1 more source

Modular One‐Pot Access to π‐Expanded Tetrakis(Phenothiazinyl)‐Silanes With Broadly Tunable Redox and Emission Properties

Chemistry – A European Journal, EarlyView.
A library of 21 tetrakis(phenothiazinyl)‐substituted silanes with broadly variable substituent decoration, which are fully reversible multistage redox systems with intense tunable emission from deep blue to yellow–green (441–533 nm), was rapidly synthesized by bromine–lithium exchange/borylation–Suzuki coupling of tetrakis(4‐bromophenyl)silane or by ...
Thomas P. M. Merke, Lysander Presser, Leonard Karl, Christian Ganter, Thomas J. J. Müller   +4 more
wiley   +1 more source

XUV frequency comb spectroscopy [PDF]

, 2010
Frequency comb lasers in the infrared region of the spectrum have revolutionized many fields of physics. We demonstrate for the first time direct frequency comb spectroscopy at XUV wavelengths.
Ubachs, W.M.G., Katori, H., Kandula, D.Z., Eikema, K.S.E., Gohle, C., Pinkert, T.J., Nakagawa, K., Yoneda, H.   +7 more
core   +1 more source

Phase noise characterization of injection locked semiconductor lasers to a 250 MHz optical frequency comb

Two lasers are simultaneously injection locked to the same comb mode and the injection locking quality is assessed in terms of phase noise and phase variance (1 kHz-10 MHz) for various injected ...
Wu, D., Slavík, R., Marra, G., Richardson, D.J.   +3 more
core   +1 more source

The Impacts of Chief Sustainability Officers' Structural Power on Corporate Social Responsibility Performance

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT Extant literature assumes that powerful executives can wield their influence with minimal opposition from lower‐power actors. We reconsider this assumption by incorporating the coalitional view in which lower‐power actors can mobilize coalitions to resist.
Nhan Huong Nguyen, Chenyang Li, Jihoon Shin   +2 more
wiley   +1 more source

ESG Ratings and Firms' Engagement in Global Innovation Ecosystems: Implications for Green Innovation Capacity

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT The increasing salience of climate change has intensified attention to the roe of ESG ratings in shaping firms' green innovation. We examine the link between ESG performance and green innovation, highlighting the role of participation in global innovation networks.
Miaomiao Tao, David Roubaud, Mingzhi Zhang, Qianli Ma   +3 more
wiley   +1 more source

Orchestrating Green Transformation: How AI Adoption Enables Corporate Carbon Neutrality

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT As carbon neutrality has become a central goal of global climate governance, how firms achieve low‐carbon transformation has emerged as a critical research issue. However, prior studies have primarily focused on macro‐ or industry‐level analyses, offering limited and fragmented insights into how digital technologies—particularly AI—affect firm‐
Xiaonan Dong, Sungjin Son
wiley   +1 more source