Results 111 to 120 of about 882,801 (311)

400 mW narrow linewidth single-frequency fiber ring cavity laser in 2 um waveband.

Optics Express, 2019
We present a single-frequency thulium-doped fiber laser (TDFL) with a narrow linewidth of 20 kHz. Stable single-longitudinal-mode (SLM) lasing operation at 1957 nm is achieved using a segment of un-pumped polarization-maintaining thulium-doped fiber (PM ...
Taoce Yin, Yufu Song, Xiaogang Jiang, Feihong Chen, Sailing He   +4 more
semanticscholar   +1 more source

Narrow-linewidth exciton-polariton laser

Optica
Exciton-polariton lasers are a promising source of coherent light for low-energy applications due to their low-threshold operation. However, a detailed experimental study of their spectral purity, which directly affects their coherence properties, is still missing.
Bianca Rae Fabricante, Mateusz Król, Matthias Wurdack, Maciej Pieczarka, Mark Steger, David W. Snoke, Kenneth West, Loren N. Pfeiffer, Andrew G. Truscott, Elena A. Ostrovskaya, Eliezer Estrecho   +10 more
openaire   +2 more sources

Narrow Luminescence Linewidth of a Silicon Quantum Dot

Physical Review Letters, 2005
Single-dot luminescence spectroscopy was used to study the emission linewidth of individual silicon nanocrystals from low temperatures up to room temperature. The results show a continuous line narrowing towards lower temperatures with a linewidth as sharp as 2 meV at 35 K.
Sychugov, Ilya, Juhasz, Robert, Valenta, Jan, Linnros, Jan   +3 more
openaire   +4 more sources

Versatile Control of Spectral Emissivity in Mid‐Infrared Metasurfaces via Silicon Microstructuring

Advanced Optical Materials, EarlyView.
A family of metasurfaces is obtained very simply, solely through the structuration of a single‐crystal silicon surface, without any other material involved. Based on the infrared plasmonic behavior of highly doped silicon, further control of surface topography by micro‐ and nano‐structuration is found to enable an avenue of options toward tailoring its
Kirollos Ernest Matta, Elyes Nefzaoui, Ahmed A. Elsayed, Armande Hervé, Martine Gnambodoe‐CapoChichi, Frédéric Marty, Mazen Erfan, Yasser M. Sabry, Abdelkrim Khelif, Tarik Bourouina   +9 more
wiley   +1 more source

Black hole masses in narrow-line Seyfert 1 galaxies

, 2004
The masses of central supermassive black holes in a soft X-ray selected sample of the narrow-line Seyfert 1 galaxies (NLS1s) are estimated by some different methods to test their theoretical models. Apart from the methods using the H$\beta$ linewidth and
Bian, Bian, Bian, Bian, Bian, Bian, Boller, Boroson, Boroson, Botte, Cao, Cheng, Czerny, Elvis, Goodrich, Grupe, Grupe, Grupe, Grupe, Grupe, Grupe, Grupe, Grupe, Ho, Kaspi, Krolik, Laor, Leighly, Lu, Mathur, Mathur, McLure, McLure, Mineshige, Nelson, Ohsuga, Osterbrock, Peterson, Pounds, Shemmer, Shields, Smith, Sulentic, Tremaine, Vestergaard, Véron-Cetty, W. Bian, Wandel, Wandel, Wang, Wang, Wang, Wang, Wang, Willams, Wills, Wu, Wu, Y. Zhao, Zhou   +59 more
core   +2 more sources

Quasi‐Bound States in the Continuum on the Bloch‐Surface‐Wave Platform for Sensing With Simultaneous High Q‐Factor and High Sensitivity

Advanced Optical Materials, EarlyView.
Quasi‐bound states in the continuum on the Bloch surface wave platform are demonstrated, exhibiting high Q‐factors due to strongly suppressed radiative losses and high sensitivity arising from the large evanescent field inherent to the surface wave. The resonance shows clear shifts after each surface molecular functionalization step, highlighting its ...
Bo‐Wei Lin, Mu‐Hsin Chen, Yang‐Chun Lee, Tang Dang, Di Xing, Hiroaki Matsui, Jean‐Jacques Delaunay   +6 more
wiley   +1 more source

Narrow Linewidth 510 nm Laser via Single-Pass Frequency-Tripling by Waveguide PPLNs

Photonics
A single-frequency narrow linewidth green laser at 510 nm is a vital component for the study of Cesium Rydberg atoms. Here, we demonstrate a 510 nm laser based on single-pass second-harmonic generation (SHG) and sum-frequency generation (SFG) via ...
Yanlin Chen, Jing Zhang, Xiaolang Qiu, Suo Wang, Chuanchuan Li, Haiyang Yu, Xin Wei   +6 more
doaj   +1 more source

Infrared Colloidal Quantum Dot Edge Emitting Lasers Integrated on Silicon

Advanced Optical Materials, EarlyView.
In this work, the first monolithic integration of Pb‐chalcogenide CQDs in an edge‐emitting DFB laser cavity onto a Si/SiO2 substrate has been demonstrated. The optimizations of SiO2 layer thickness, engineering of the grating duty cycle, and implementing λ/4 phase shift resulted in the achievement of spectrally pure, single‐mode lasing at 1650 nm with ...
Hamed Dehghanpour Baruj, Guy L. Whitworth, Nima Taghipour, Mariona Dalmases, Debranjan Mandal, Gerasimos Konstantatos   +5 more
wiley   +1 more source

High-Power Narrow-Linewidth Q-Switched TEM₀₀ Mode 355-nm Laser

IEEE Photonics Journal, 2018
We report on a high pulse energy, narrow-linewidth, Q-switched ultraviolet (UV) laser at 355 nm from the third harmonic generation (THG) of a 1064-nm Nd:YAG master oscillator power amplifier (MOPA) system.
Yujiao Li, Wei Tu, Baoshang Wang, Nan Zong, Feng Yang, Fengfeng Zhang, Shenjin Zhang, Zhimin Wang, Qinjun Peng, Dafu Cui, Zuyan Xu   +10 more
doaj   +1 more source

Self-linewidth-narrowing photonic oscillator

Optics Express
We detail here the general principle of a self-adaptive oscillator in which the intertwined operation of a 100-m-long active optical resonator and a standard semiconductor laser mutually coupled by stimulated Brillouin scattering offers an ultimate high spectral purity.
Alouini, Mehdi, Danion, Gwennael, Vallet, Marc   +2 more
openaire   +2 more sources