Results 61 to 70 of about 125,078 (291)

Detection of ultra-high resonance contrast in vapor cell atomic clocks

, 2012
We propose and demonstrate a novel detection scheme of clock signals and obtain an ultra-high resonance contrast above 90%. The precision of the signal's detection and the signal-to-noise ratio (SNR) of atomic clock signal is improved remarkably.
Allan, Ardit, Budker, Gawlik, Gawlik, Godone, Huijuan He, Jianliao Deng, Jinda Lin, Lvovsky, Micalizio, Micalizio, Vanier, Vanier, Yisheng Ma, Yuzhu Wang, Zibrov, Zibrov, Zigdon   +18 more
core   +1 more source

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

Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators with 1 x 10^-16 frequency instability

, 2012
Two nominally identical ultra-stable cryogenic microwave oscillators are compared. Each incorporates a dielectric-sapphire resonator cooled to near 6 K in an ultra-low vibration cryostat using a low-vibration pulse-tube cryocooler.
Hartnett, John G., Lu, Chuan, Nand, Nitin R.   +2 more
core   +1 more source

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

Probing Cellular Activity Via Charge‐Sensitive Quantum Nanoprobes

Advanced Materials, EarlyView.
A new quantum sensing modality detects shifts in zero‐field splitting caused by charge rearrangement with diamond nanocrystals in response to cellular activity. These electric‐field‐driven effects provide an alternative to temperature‐based interpretations, enabling real‐time, single‐cell readout of inflammation.
Uri Zvi, Shivam Mundhra, David Ovetsky, Qing Chen, Aidan R. Jones, Stella Wang, Maria J. Román‐Vazquez, Marie Kim, Udoka M. Ibeh, Michele Ferro, Kunle Odunsi, Marina C. Garassino, Michael E. Flatté, Melody A. Swartz, Denis R. Candido, Aaron Esser‐Kahn, Peter C. Maurer   +16 more
wiley   +1 more source

Suitability of a Non-Dispersive Infrared Methane Sensor Package for Flux Quantification Using an Unmanned Aerial Vehicle

Sensors, 2019
Point-source methane emission flux quantification is required to help constrain the global methane budget. Facility-scale fluxes can be derived using in situ methane mole fraction sampling, near-to-source, which may be acquired from an unmanned aerial ...
Adil Shah, Joseph Pitt, Khristopher Kabbabe, Grant Allen   +3 more
doaj   +1 more source

Laser frequency stabilization using a commercial wavelength meter

, 2018
We present the characterization of a laser frequency stabilization scheme using a state-of-the-art wavelength meter based on solid Fizeau interferometers. For a frequency-doubled Ti-sapphire laser operated at 461 nm, an absolute Allan deviation below $10^
Chen, Peng, Couturier, Luc, Hu, Fachao, Jiang, Y. H., Nosske, Ingo, Qiao, Chang, Tan, Canzhu, Weidemüller, Matthias   +7 more
core   +1 more source

Vat Photopolymerized HEMA/HEA Hydrogels for Solvent‐Responsive Transparency and Optical Encryption

Advanced Optical Materials, EarlyView.
Vat‐photopolymerized HEMA/HEA hydrogels exhibit reversible transparency‐opacity switching via hydration‐induced microphase separation and solvent exchange. The printed materials enable hydration sensing, optical encryption, and information storage, while maintaining high ductility and reversible rheology.
Murad Ali, Mohammed Ayaz Uddin, Dileep Chekkaramkodi, Rashid K. Abu Al‐Rub, Haider Butt   +4 more
wiley   +1 more source

Performance of a prototype atomic clock based on lin||lin coherent population trapping resonances in Rb atomic vapor

, 2009
We report on the performance of the first table-top prototype atomic clock based on coherent population trapping (CPT) resonances with parallel linearly polarized optical fields (lin||lin configuration).
Belcher, Ben-Aroya, Breschi, Cyr, Erhard, Eugeniy E. Mikhailov, Fleischhauer, Griffith, Irina Novikova, Jau, Jau, Kazakov, Knappe, Knappe, Knappe, Knappe, Kominis, Kornack, Ledbetter, Merimaa, Mikhailov, Nathan Belcher, Novikova, Novikova, Phillips, Shah, Shah, Taichenachev, Taichenachev, Taichenachev, Travis Horrom, Vanier, Vanier, Xiao, Xiao, Yashchuk, Zanon, Zibrov, Zibrov   +38 more
core   +1 more source

Degradable Magnetic Composites from Recycled NdFeB Magnets for Soft Actuation and Sensing

Advanced Robotics Research, EarlyView.
This work presents a degradable soft magnetic composite made from recycled NdFeB particles embedded in a gelatin‐based organogel. The material is processed into magnetic sensors and soft robotic components, which can later be dissolved in a green solvent to recover NdFeB magnetic particles.
Muhammad Bilal Khan, Lin Guo, Kilian Schäfer, Eduardo Sergio Oliveros‐Mata, Xiaotao Wang, Florian Hofmann, Matthias Lutzi, Mark Suppelt, Proloy Taran Das, Jan Schmidtpeter, Imants Dirba, Stephan Rinderknecht, Mario Kupnik, Denys Makarov, Oliver Gutfleisch   +14 more
wiley   +1 more source