scholarly journals Laser devices with stacked layers of InGaAs/GaAs quantum rings

2004 ◽  
Vol 15 (4) ◽  
pp. S126-S130 ◽  
Author(s):  
Ferran Suárez ◽  
Daniel Granados ◽  
María Luisa Dotor ◽  
Jorge M García
Keyword(s):  
Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3370
Author(s):  
Emmanouil-George C. Tzanakakis ◽  
Evangelos Skoulas ◽  
Eudoxie Pepelassi ◽  
Petros Koidis ◽  
Ioannis G. Tzoutzas

Lasers have been well integrated in clinical dentistry for the last two decades, providing clinical alternatives in the management of both soft and hard tissues with an expanding use in the field of dental materials. One of their main advantages is that they can deliver very low to very high concentrated power at an exact point on any substrate by all possible means. The aim of this review is to thoroughly analyze the use of lasers in the processing of dental materials and to enlighten the new trends in laser technology focused on dental material management. New approaches for the elaboration of dental materials that require high energy levels and delicate processing, such as metals, ceramics, and resins are provided, while time consuming laboratory procedures, such as cutting restorative materials, welding, and sintering are facilitated. In addition, surface characteristics of titanium alloys and high strength ceramics can be altered. Finally, the potential of lasers to increase the adhesion of zirconia ceramics to different substrates has been tested for all laser devices, including a new ultrafast generation of lasers.


2007 ◽  
Vol 91 (13) ◽  
pp. 133116 ◽  
Author(s):  
A. Mühle ◽  
W. Wegscheider ◽  
R. J. Haug
Keyword(s):  

CrystEngComm ◽  
2021 ◽  
Author(s):  
Mingming Jiang ◽  
Fupeng Zhang ◽  
Kai Tang ◽  
Peng Wan ◽  
Caixia Kan

Achieving electrically-driven exciton-polaritons has drawn substantial attention toward developing ultralow-threshold coherent light sources, containing polariton laser devices and high-performance light-emitting diodes (LEDs). In this work, we demonstrate an electrically driven...


Micromachines ◽  
2017 ◽  
Vol 8 (12) ◽  
pp. 362 ◽  
Author(s):  
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2017 ◽  
Vol 83 (1) ◽  
Author(s):  
E. Di Palma ◽  
E. Sabia ◽  
G. Dattoli ◽  
S. Licciardi ◽  
I. Spassovsky

We take advantage of previous research in the field of cyclotron auto resonance maser (CARM) and undulator-based free electron laser (U-FEL) sources to establish a common formalism for the relevant description of the underlying physical mechanisms. This strategy is aimed at stressing the deep analogies between the two devices and at providing a practical tool for their study based on the use of well-tested scaling formulae developed independently for the two systems.


2014 ◽  
Vol 511-512 ◽  
pp. 173-177 ◽  
Author(s):  
Rong Jun Lu ◽  
De Ming Shen ◽  
Qian Qian Du ◽  
Bao Zhen Huang ◽  
Jian Shu Shi

Static and dynamic tuning characteristics of Distribute Feedback (DFB) diode lasers are investigated with practical laser devices. These characteristics are the basic guidelines for practical TDLAS sensors design. Static tuning characteristics help to select suitable diode lasers from limited available laser devices with specific wavelength and to set an appropriate working current and temperature. Dynamic tuning characteristics decide the sweep speed of current slope in both direct absorb Spectroscopy (DAS) and wavelength modulation Spectroscopy (WMS). Because of nonlinearity in the relation between wavelength and tuning current, the measured spectral line position should be corrected by the dynamic characteristics. For WMS, current tuning efficient and IM/AM (Intense modulation/Amplitude modulation) differential phase could be utilized to optimize laser modulation and harmonic components demodulation.


2009 ◽  
Vol 255 (8) ◽  
pp. 4452-4455 ◽  
Author(s):  
Guo-zhi Jia ◽  
Jiang-hong Yao ◽  
Yong-chun Shu ◽  
Xiao-dong Xing ◽  
Biao Pi

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