Results 41 to 50 of about 124,588 (288)

Whispering gallery mode resonator based ultra-narrow linewidth external cavity semiconductor laser

, 2010
We demonstrate a miniature self-injection locked DFB laser using resonant optical feedback from a high-Q crystalline whispering gallery mode resonator.
A. A. Savchenkov, A. B. Matsko, D. Seidel, Dahmani, Gorodetsky, Hemmerich, Hjelme, Hollberg, Kieu, L. Maleki, Matsko, Sprenger, V. S. Ilchenko, Vassiliev, Vassiliev, W. Liang   +15 more
core   +1 more source

Decoherence benchmarking of superconducting qubits [PDF]

, 2019
We benchmark the decoherence of superconducting qubits to examine the temporal stability of energy-relaxation and dephasing. By collecting statistics during measurements spanning multiple days, we find the mean parameters $\overline{T_{1}}$ = 49 $\mu$s ...
Bengtsson, Andreas, Burnett, Jonathan, Bylander, Jonas, Delsing, Per, Kudra, Marina, Niepce, David, Scigliuzzo, Marco   +6 more
core   +2 more sources

Robust and Reversible Thermofluorescence in Solvent‐Free Thermoplastic Polyurethane Composites

Advanced Functional Materials, EarlyView.
Thermofluorescent polymer composites with high‐contrast optical outputs are prepared by solvent‐free blending of indenoquinacridone dye into a thermoplastic polyurethane matrix. The temperature‐dependent fluorescence originates from aggregation–dissociation of the dye molecules, regulated by competing hydrogen bonds from the polymer matrix.
Guanghua Yu, Bowen Tian, Jazmine Aiya Marquez, Chia‐Min Hsieh, Qingsheng Wang, Hung‐Jue Sue, Mohammed Al‐Hashimi, Peiran Wei, Lei Fang   +8 more
wiley   +1 more source

Minimizing the Dick Effect in an Optical Lattice Clock

, 2009
We discuss the minimization of the Dick effect in an optical lattice clock. We show that optimizing the time sequence of operation of the clock can lead to a significant reduction of the clock stability degradation by the frequency noise of the ...
J. Lodewyck, Jérôme Lodewyck, Jérôme Lodewyck, P. Lemonde, P. Westergaard, Philip G. Westergaard, Philip G. Westergaard, Pierre Lemonde, Pierre Lemonde   +8 more
core   +2 more sources

Low-frequency Gravitational Wave Detection via Double Optical Clocks in Space [PDF]

, 2018
We propose a Doppler tracking system for gravitational wave detection via Double Optical Clocks in Space (DOCS). In this configuration two spacecrafts (each containing an optical clock) are launched to space for Doppler shift observations.
Jetzer, Philippe, Su, Jianfeng, Wang, Qiang, Wang, Qinghua   +3 more
core   +2 more sources

On the relation between uncertainties of weighted frequency averages and the various types of Allan deviations [PDF]

Metrologia, 2015
The power spectral density in Fourier frequency domain, and the different variants of the Allan deviation (ADEV) in dependence on the averaging time are well established tools to analyse the fluctuation properties and frequency instability of an oscillatory signal. It is often supposed that the statistical uncertainty of a measured average frequency is
Benkler, Erik, Lisdat, Christian, Sterr, Uwe   +2 more
openaire   +2 more sources

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Analysis of the Long‐Term Stability of TSI Instruments Using Allan Deviation and the Generation of a New TSI Composite

Earth and Space Science
The dominant external forcing to Earth's climate system is solar radiation, referred to as the solar spectral irradiance (SSI) and the total solar irradiance (TSI), which is the integral of SSI over all wavelengths.
O. Coddington, D. Harber, P. Pilewskie, E. Richard, T. Patton   +4 more
doaj   +1 more source

Investigation of A Slow-Light Enhanced Near-Infrared Absorption Spectroscopic Gas Sensor, Based on Hollow-Core Photonic Band-Gap Fiber

Sensors, 2018
Generic modeling and analysis of a slow-light enhanced absorption spectroscopic gas sensor was proposed, using a mode-tuned, hollow-core, photonic band-gap fiber (HC-PBF) as an absorption gas cell.
Zhi-Fa Wu, Chuan-Tao Zheng, Zhi-Wei Liu, Dan Yao, Wen-Xue Zheng, Yi-Ding Wang, Fei Wang, Da-Ming Zhang   +7 more
doaj   +1 more source

Role of fluctuations and nonlinearities on field emission nanomechanical self-oscillators

, 2013
A theoretical and experimental description of the threshold, amplitude, and stability of a self-oscillating nanowire in a field emission configuration is presented.
AYARI, Anthony, Barois, Thomas, Perisanu, S., Purcell, Stephen T., Vincent, Pascal   +4 more
core   +2 more sources