نتایج جستجو برای: spontaneous emission rate enhancement

تعداد نتایج: 1331926  

In this article, the temperature behavior of output power of superluminescent light-emitting diode (SLED) by considering the effect of non-radiative recombination coefficient, non-radiative spontaneous emission coefficient and Auger recombination coefficients has been investigated. For this aim, GaN pyramidal quantum dots were used as the active region. The numerical method has been used to sol...

2005
Georgios Veronis Wonjoo Suh Yang Liu Minghui Han Zheng Wang Robert W. Dutton Shanhui Fan

We use coupled optical and electronic simulations to investigate design trade-offs in electrically pumped photonic-crystal-based light-emitting diodes. A finite-difference frequency-domain electromagnetic solver is used to calculate the spontaneous emission enhancement factor and the extraction efficiency as a function of frequency and of position of the emitting source. The calculated enhancem...

2008
Jonathan P Dowling

I consider an exact model of atomic spontaneous dipole emission and classical dipole radiation in a finite photonic band-gap structure. The full 3D or 2D problem is reduced to a finite 1D model, and then this is solved for analytically using algebraic matrix transfer techniques. The results give insight to the electromagnetic emission process in periodic dielectrics, quantitative predictions fo...

2013
Ji-Hee Kim G. Timothy Noe II Stephen A. McGill Yongrui Wang Aleksander K. Wójcik Alexey A. Belyanin Junichiro Kono

Nonequilibrium can be a source of order. This rather counterintuitive statement has been proven to be true through a variety of fluctuation-driven, self-organization behaviors exhibited by out-of-equilibrium, many-body systems in nature (physical, chemical, and biological), resulting in the spontaneous appearance of macroscopic coherence. Here, we report on the observation of spontaneous bursts...

2008
Hongping Zhao Ronald A. Arif Nelson Tansu

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Journal: :Physical review letters 2005
E Viasnoff-Schwoob C Weisbuch H Benisty S Olivier S Varoutsis I Robert-Philip R Houdré C J M Smith

Photonic wires are the simplest extended low-dimensional systems. Photonic crystal confinement confers them a divergent density of states at zero-group-velocity points, which leads to enhancement of spontaneous emission rates [D. Kleppner, Phys. Rev. Lett. 47, 233 (1981)10.1103/Phys. Rev. Lett. 47.233]. We experimentally evidence, for the first time, the spectral signature of these Purcell fact...

2012
X. M. Dou B. Q. Sun D. S. Jiang H. Q. Ni Z. C. Niu

Related Articles Enhancement of spontaneous emission in three-dimensional low refractive-index photonic crystals with designed defects Appl. Phys. Lett. 101, 071109 (2012) Optical properties and effect of carrier tunnelling in CdSe colloidal quantum dots: A comparative study with different ligands AIP Advances 2, 032132 (2012) Controlling the photoluminescence of acceptor and donor quantum dots...

Journal: :Optics letters 2007
M L Terraciano R Olson Knell D L Freimund L A Orozco J P Clemens P R Rice

We study the light generated by spontaneous emission into a mode of a cavity QED system under weak excitation of the orthogonally polarized mode. Operating in the intermediate regime of cavity QED with comparable coherent and decoherent coupling constants, we find an enhancement of the emission into the undriven cavity mode by more than a factor of 18.5 over that expected by the solid angle sub...

Journal: :Optics express 2008
V M Menon M Luberto N V Valappil S Chatterjee

We report the realization of a mechanically flexible microcavity laser emitting at 657 nm using spin coating. These optically pumped vertical cavity surface emitting lasers use InGaP colloidal quantum dots as the active medium and alternating polymer layers of different refractive indices as the Bragg mirrors. Results of photoluminescence measurements indicating enhancement in spontaneous emiss...

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