Results 101 to 110 of about 62,046 (293)

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

Linewidth in quantum cascade lasers

Asia Communications and Photonics Conference 2013, 2013
In this talk, we will first discuss the intrinsic linewidth of quantum cascade lasers (QCLs) mainly caused by fundamental thermodynamic fluctuation. Then, we will discuss the dynamics of coherent interaction and resonant-tunneling transport effects on the linewidth of QCLs.
Qi Jie Wang, Tao Liu
openaire   +2 more sources

Excitonic Landscapes in Monolayer Lateral Heterostructures Revealed by Unsupervised Machine Learning

Advanced Optical Materials, EarlyView.
Hyperspectral photoluminescence data from graded MoxW1 − xS2 alloys and monolayer MoS2–WS2 lateral heterostructures are analyzed using unsupervised machine learning. The combined use of PCA, t‐SNE, and DBSCAN uncovers distinct excitonic regions that trace how composition, strain, and defects modulate optical responses in these 2D materials.
Maninder Kaur, Nicolas T. Sandino, Jason P. Terry, Mahdi Ghafariasl, Yohannes Abate   +4 more
wiley   +1 more source

Phase-locking of two self-seeded tapered amplifier lasers

, 2010
We report on the phase-locking of two diode lasers based on self-seeded tapered amplifiers. In these lasers, a reduction of linewidth is achieved using narrow-band high-transmission interference filters for frequency selection.
Baillard, Bordé, Ch. Schubert, Cheinet, Dimopoulos, Dáringshoff, E. M. Rasel, Ertmer, Fiebig, G. Tackmann, Gilowski, Lamporesi, Le Gouët, Le Gouët, Lévèque, M. Gilowski, Müller, Müller, P. Berg, Santarelli, T. Wendrich, Tien, Vogel, W. Ertmer, Wilson   +24 more
core   +1 more source

Micromachined Double‐Membrane Mechanically Tunable Metamaterial for Thermal Infrared Filtering

Advanced Photonics Research, Volume 6, Issue 5, May 2025.
Herein, a mechanically tunable double‐layer plasmonic metamaterial leveraging the extraordinary optical transmission effect observed in subwavelength arrays of openings within thin metal layers is presented. The concept is experimentally validated by integrating the proposed metamaterial structure into an electrostatic parallel‐plate actuator to create
Oleg Bannik, Fedor Kovalev, Mingkai Liu, Michal Zawierta, Dilusha Silva, Lorenzo Faraone, Mariusz Martyniuk, Ilya Shadrivov   +7 more
wiley   +1 more source

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

Advanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida, Koichi Okamoto, Takuya Matsuda, Hajime Ishihara   +3 more
wiley   +1 more source

In situ measurement of spectral linewidth in wavelength-modulated signals for frequency-modulated continuous-wave LiDAR systems

AIP Advances
This paper advances an in situ method to measure the spectral linewidth directly from the currently generated wavelength-modulated signals in frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR) systems, diverging from ...
Jongpil La, Munhyun Han, Jieun Choi, Bongki Mheen   +3 more
doaj   +1 more source

High-power, ultra-low-noise cascaded diamond Raman lasers with spectrum compression

High Power Laser Science and Engineering
Stimulated Raman scattering is a third-order nonlinear optical effect that is not only effective for wavelength converting laser output, but also for single longitudinal-mode output due to the absence of spatial hole burning. Diamond is a prominent Raman-
Hui Chen, Zhongan Zhao, Wenqiang Fan, Yunpeng Cai, Boyuan Zhang, Jie Ding, Yaoyao Qi, Bingzheng Yan, Yulei Wang, Zhiwei Lu, Zhenxu Bai   +10 more
doaj   +1 more source

Mode-Hopping-Free Single-Longitudinal-Mode Actively Q-Switched Ring Cavity Fiber Laser With an Injection Seeding Technique

IEEE Photonics Journal, 2017
With a fiber pigtailed electro-optic modulator as the active Q-switch, mode-hopping-free single-longitudinal-mode pulses are generated by a ring cavity fiber laser based on the injection seeding technique.
Wencai Li, Haowei Liu, Ji Zhang, Bo Yao, Sujuan Feng, Li Wei, Qinghe Mao   +6 more
doaj   +1 more source

Titanium-doped sapphire laser research and design study [PDF]

Three main topics were considered in this study: the fundamental laser parameters of titanium-doped sapphire, characterization of commercially grown material, and design of a tunable, narrow-linewidth laser.
Moulton, Peter F.
core   +1 more source