Results 51 to 60 of about 28,123,794 (342)

Universal behavior of the thermoelectric figure of merit, zT, vs. quality factor [PDF]

Materials today physics, 2018
To increase the performance of thermoelectric materials, the electronic parameters in the figure of merit must be improved. In this paper, we use full, numerical band structures and solve the Boltzmann equation in the relaxation time approximation using ...
Evan Witkoske, Xufeng Wang, J. Maassen, M. Lundstrom   +3 more
semanticscholar   +1 more source

Design and Optimization of an Ultra-Low-Power Cross-Coupled LC VCO with a DFF Frequency Divider for 2.4 GHz RF Receivers Using 65 nm CMOS Technology

Journal of Low Power Electronics and Applications, 2023
This article presents the design and optimization of a tunable quadrature differential LC CMOS voltage-controlled oscillator (VCO) with a D flip-flop (DFF) frequency divider.
Muhammad Faisal Siddiqui, Mukesh Kumar Maheshwari, Muhammad Raza, Aurangzeb Rashid Masud   +3 more
doaj   +1 more source

Ultrahigh-quality factor resonant dielectric metasurfaces based on hollow nanocuboids.

Optics Express, 2019
In this work, a dielectric metasurface consisting of hollow dielectric nanocuboids, with ultrahigh quality factor, is theoretically proposed and demonstrated. The variation of the hole size of the cuboid allows for the tuning of the resonant anapole mode
J. F. Algorri, D. Zografopoulos, A. Ferraro, B. García-Cámara, R. Beccherelli, J. Sánchez-Pena   +5 more
semanticscholar   +1 more source

Design of N‐Type Textured Bi2Te3 with Robust Mechanical Properties for Thermoelectric Micro‐Refrigeration Application

Advanced Science, 2023
Thermoelectric refrigeration is one of the mature techniques used for cooling applications, with the great advantage of miniaturization over traditional compression refrigeration.
Yu‐Ke Zhu, Yifan Jin, Jianbo Zhu, Xingyan Dong, Ming Liu, Yuxin Sun, Muchun Guo, Fushan Li, Fengkai Guo, Qian Zhang, Zihang Liu, Wei Cai, Jiehe Sui   +12 more
doaj   +1 more source

Acoustic Performance Study of Fiber-Optic Acoustic Sensors Based on Fabry–Pérot Etalons with Different Q Factors

Micromachines, 2022
The ideal development direction of the fiber-optic acoustic sensor (FOAS) is toward broadband, a high sensitivity and a large dynamic range. In order to further promote the acoustic detection potential of the Fabry–Pérot etalon (FPE)-based FOAS, it is of
Jiamin Chen, Chenyang Xue, Yongqiu Zheng, Jiandong Bai, Xinyu Zhao, Liyun Wu, Yuan Han   +6 more
doaj   +1 more source

Integrated high quality factor lithium niobate microdisk resonators

, 2014
Lithium Niobate (LN) is an important nonlinear optical material. Here we demonstrate LN microdisk resonators that feature optical quality factor ~ 100,000, realized using robust and scalable fabrication techniques, that operate over a wide wavelength ...
Atikian, Haig A., Burek, Michael J., Huang, I-Chun, Lin, Zin, Lončar, Marko, Stark, Peter, Venkataraman, Vivek, Wang, Cheng   +7 more
core   +1 more source

Effective quality factor tuning mechanisms in micromechanical resonators

Applied Physics Reviews, 2018
Quality factor (Q) is an important property of micro- and nano-electromechanical (MEM/NEM) resonators that underlie timing references, frequency sources, atomic force microscopes, gyroscopes, and mass sensors.
J. M. Miller, A. Ansari, D. Heinz, Yunhan Chen, I. Flader, D. D. Shin, L. Villanueva, T. Kenny   +7 more
semanticscholar   +1 more source

Communication and Language Profiles of Children Treated for Posterior Fossa Brain Tumors

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Cognitive and language deficits are frequently reported sequelae of posterior fossa brain tumors (PFBT). Typically, delayed onset impedes prompt assessment and early intervention. This has devastating implications for quality of life.
Zara Sved, Meghan Hesse, Jennie Cusiter, Annabel Webb, Kimberley Docking   +4 more
wiley   +1 more source

Development of a Novel Gear-like Disk Resonator Applied in Gyroscope

Applied Sciences, 2022
This paper proposes a novel gear-like disk resonator (GDR). The design, fabrication, and characterization of GDR are presented. In comparison with a ring-like disk resonator (RDR), a GDR replaces the circular rings with meander-shaped rings consisting of
Liutao Gu, Weiping Zhang, Jun Feng, Zhihan Zhang   +3 more
doaj   +1 more source

Clamp-tapering increases the quality factor of stressed nanobeams

, 2019
Stressed nanomechanical resonators are known to have exceptionally high quality factors ($Q$) due to the dilution of intrinsic dissipation by stress. Typically, the amount of dissipation dilution and thus the resonator $Q$ is limited by the high mode ...
Beccari, Alberto, Bereyhi, Mohammad J., Engelsen, Nils J., Fedorov, Sergey A., Ghadimi, Amir H., Kippenberg, Tobias J., Schilling, Ryan, Wilson, Dalziel J.   +7 more
core   +2 more sources