Results 61 to 70 of about 51,864 (269)

Phonon Engineering in Ultrathin Sn Films

Advanced Materials Interfaces, EarlyView.
When embedded in multilayer structures, ultrathin Sn layers demonstrate strongly modified vibrational density of states (VDOS). This allows engineering a drastic increase of the Lamb‐Mössbauer factor fLM$f_{\text{LM}}$ and thereby of the cross‐section for coherent excitation of the ultrasharp nuclear resonance of 119Sn$^{119}{\rm Sn}$. This enables the
Sven Velten, Kai Schlage, Ilya Sergeev, Olaf Leupold, René Steinbrügge, Varimalla Raghavendra Reddy, Michael Yu Hu, Esen Ercan Alp, Lars Bocklage, Ralf Röhlsberger   +9 more
wiley   +1 more source

Tunable Narrow-Linewidth Si₃N₄ Cascaded Triple-Ring External-Cavity Semiconductor Laser for Coherent Optical Communications

Photonics
We propose an external-cavity laser that combines wide tunability with narrow linewidth. The design utilizes a low-loss Si3N4 waveguide and a thermally tuned cascaded triple-ring resonator to enable continuous wavelength tuning. The numerical simulations
Tong Wang, Yuchen Hu, Wen Zhou, Ye Wang
doaj   +1 more source

Wafer‐Scale Single‐Crystal Boron Nitride: Synthesis and Integration in 2D Electronics

Advanced Materials Interfaces, EarlyView.
This Review highlights recent breakthroughs in wafer‐scale hBN synthesis and its integration into next‐generation 2D electronics. We analyze growth kinetics, epitaxial strategies, and stacking‐sequence control while correlating material quality with device performance.
Jaewon Wang, Soon‐Yong Kwon
wiley   +1 more source

Subwavelength-grating coupled-cavity resonance VCSELs with ultra-narrow linewidth

APL Photonics
Vertical-cavity surface-emitting lasers (VCSELs) characterized by compactness, high stability, and narrow linewidths are of significant interest for miniature atomic sensing applications.
Li-shan Fu, Ning Cui, Feng Zhang, Ji-sheng Wang, Ao Qiu, Bao-lu Guan, Ai-Qun Liu   +6 more
doaj   +1 more source

Dual-microcavity narrow-linewidth Brillouin laser [PDF]

, 2015
Ultralow-noise yet tunable lasers are a revolutionary tool in precision spectroscopy, displacement measurements at the standard quantum limit, and the development of advanced optical atomic clocks.
Baynes, Fred N., Cole, Daniel C., Diddams, Scott A., Green, Adam A. S., Lee, Hansuek, Loh, William, Papp, Scott B., Quinlan, Franklyn J., Vahala, Kerry J.   +8 more
core   +2 more sources

Extending Timescales and Narrowing Linewidths in NMR

CHIMIA, 2011
Among the different fields of research in nuclear magnetic resonance (NMR) which are currently investigated in the Laboratory of Biomolecular Magnetic Resonance (LRMB), two subjects that are closely related to each other are presented in this article.
Segawa, Takuya F, Bornet, Aurélien, Salvi, Nicola, Miéville, Pascal, Vitzthum, Veronika, Carnevale, Diego, Jannin, Sami, Caporini, Marc A, Ulzega, Simone, Vasos, Paul R, Rey, Martial, Bodenhausen, Geoffrey   +11 more
openaire   +6 more sources

Exploring the Potential of Microwave Annealing for Enhancing Si‐based GeSn Lasers

Advanced Materials Technologies, EarlyView.
We explore low‐thermal‐budget microwave annealing to enhance the performance of group‐IV GeSn lasers on Si. Microwave annealing under optimal conditions can simultaneously relax unwanted compressive strain and enhance the material quality of the GeSn active layer, thereby reducing the threshold and increasing the laser operating temperature.
Yue‐Tong Jheng, Cheng‐Feng Liu, Ruei‐Jhang Wang, Yu Cheng, Lung‐Yi Hsu, Yonder Berencén, Shengqiang Zhou, Hanh Thi‐Thu Tran, Guo‐En Chang   +8 more
wiley   +1 more source

6 kW Single Stage Narrow Linewidth Fiber Amplifier Based on the Balance Between Mode Instability and Nonlinear Effects

IEEE Photonics Journal, 2023
Single-stage high-power narrow-linewidth fiber laser has been investigated intensively recently because of its simple and robust configuration and great potential in spectral/coherent beam combination.
Xin Tian, Binyu Rao, Meng Wang, Xiaoming Xi, Baolai Yang, Zilun Chen, Hu Xiao, Xiaolin Wang, Pengfei Ma, Zefeng Wang, Jinbao Chen   +10 more
doaj   +1 more source

Measurement of nonlinear frequency shift coefficient in spin-torque oscillators based on MgO tunnel junctions

, 2009
The nonlinear frequency shift coefficient, which represents the strength of the transformation of amplitude fluctuations into phase fluctuations of an oscillator, is measured for MgO-based spin-torque oscillators by analyzing the current dependence of ...
Kudo, Kiwamu, Mizushima, Koichi, Nagasawa, Tazumi, Sato, Rie   +3 more
core   +1 more source

Experimental analysis of emission linewidth narrowing in a pulsed KGd(WO4)2 Raman laser [PDF]

, 2014
The linewidth of a KGd(WO4)2 (KGW) intracavity pumped Raman laser is analyzed experimentally for different configurations of the Raman and pump laser resonators: with narrow and broadband pump emission profiles, with and without linewidth narrowing ...
Savitski, Vasili G.
core   +1 more source