Temperature and modulation characteristics of resonant-cavity light-emitting diodes

Schubert, E. F.; Hunt, N. E. J.; Malik, R. J.; Micovic, M.; Miller, David L.

doi:10.1109/50.507950

Cited by 137 publications

(69 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These two lengths are consistent with those at which OCE becomes maxima as shown in Fig. 8 and correspond to the fundamental and first excited modes [15]. Therefore, the low OCE at tETL=170 nm, shown in Fig.…”

Section: ～10supporting

confidence: 72%

Optical Simulation Study on the Effect of Diffusing Substrate and Pillow Lenses on the Outcoupling Efficiency of Organic Light Emitting Diodes

Jeong¹,

Ko²

2013

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

The effect of diffusing substrate and pillow lenses on the outcoupling efficiency of organic light-emitting diodes (OLEDs) was studied by optical simulation based on the point-dipole model. The diffusing substrate included Mie scatterers by which the condition of total internal reflection could be broken. The finite-difference time-domain method was used to obtain the intensity distribution on the transparent electrode of an OLED, which was used as a light source to carry out a ray-tracing simulation of the OLED and the diffusing substrate. It was found that the outcoupling efficiency of the OLED was sensitive to the thickness of organic layers and could be increased by 21.0% by adopting a diffusing substrate in which Mie scatterers whose radius was 2.0 μm were included at the density of 10 7 mm -3 and by 65.5% by forming one pillow lens with the radius of 2 mm on the front surface of the glass substrate. This study revealed that the outcoupling efficiency could be improved by adopting diffusing substrate and pillow lenses along with the optimization of the thickness of each layer in the OLED.

show abstract

Section: ～10supporting

confidence: 72%

Optical Simulation Study on the Effect of Diffusing Substrate and Pillow Lenses on the Outcoupling Efficiency of Organic Light Emitting Diodes

Jeong¹,

Ko²

2013

Journal of the Optical Society of Korea

View full text Add to dashboard Cite

show abstract

“…Such a high optical pumping intensity is required to observe a strong PL signal. FCA has been reported and investigated for optical cavities of III-V systems 31,32 as well as for Si-based photonic systems such as Si nanocrystals. 33 El Kurdi et al 14 have observed mode linewidth broadening with increasing excitation power in Si photonic crystal nanocavities with embedded Ge islands, which they attribute to FCA.…”

Section: (T)amentioning

confidence: 99%

Correlation between emission intensity of self-assembled germanium islands and quality factor of silicon photonic crystal nanocavities

et al. 2011

View full text Add to dashboard Cite

We present a comparative microphotoluminescence study of the emission intensity of self-assembled germanium islands coupled to the resonator mode of two-dimensional silicon photonic crystal defect nanocavities. The cavity-mode intensity is investigated for L3 and hexapole cavities with a range of different mode quality factors. For each type of cavity, many nominally identical samples are probed to obtain reliable statistics. As the cavity-mode quality factor increases, we observe a clear reduction of the average mode emission intensity under conditions of strong optical pumping. This clear trend is compared with simulations based on a dissipative master-equation approach that describes a cavity weakly coupled to an ensemble of emitters. We obtain direct evidence that reabsorption of photons in the cavity is responsible for the observed trend. When combined with the observation of cavity linewidth broadening in power-dependent measurements, we conclude that free carrier absorption limits the cavity-mediated light enhancement under conditions of strong excitation.

show abstract

“…DBRs possess good reflecting properties and they are used as stop−band filters and frequency−selective reflectors in different components of modern fiber−optic communication systems and integrated optics, namely, in vertical−cavity sur− face−emitting lasers (VCSELs) [1,2], resonant cavity light emitting diodes (RCLEDs) [3,4], resonant cavity enhanced (RCE) photodetectors [5], and surface−normal electro−absorp− tion modulators [6,7]. As active layers of surface−normal opera− ting devices are very thin, then their multilayer mirrors should have high enough reflectance to provide an efficient operation [1][2][3][4][5][6][7]. High reflectance of such mirrors is normally attained at great number of layers, which in the case of X−ray and UV multilayer mirrors can reach some hundreds [8,9].…”

Section: Introductionmentioning

confidence: 99%

Absorption loss influence on optical characteristics of multilayer distributed Bragg reflector: wavelength-scale analysis by the method of single expression

Baghdasaryan

Knyazyan

Baghdasaryan

et al. 2010

Opto-Electronics Review

View full text Add to dashboard Cite

Electrodynamical model of a classical distributed Bragg reflector (DBR) consisting of alternating quarter-wave layers of high and low permittivity is considered at the plane wave normal incidence. Reflective characteristics of DBR possessing absorption loss in constituting layers are analysed via correct wavelength-scale boundary problem solution by the method of single expression (MSE). Analysis of optical field and power flow density distributions within the lossy DBR structures explained the peculiarities of their reflective characteristics. Optimal configurations of lossless and lossy DBRs are revealed. Specific DBR structures possessing full transparency at definite number of layers are also analysed.

show abstract

Temperature and modulation characteristics of resonant-cavity light-emitting diodes

Cited by 137 publications

References 18 publications

Optical Simulation Study on the Effect of Diffusing Substrate and Pillow Lenses on the Outcoupling Efficiency of Organic Light Emitting Diodes

Optical Simulation Study on the Effect of Diffusing Substrate and Pillow Lenses on the Outcoupling Efficiency of Organic Light Emitting Diodes

Correlation between emission intensity of self-assembled germanium islands and quality factor of silicon photonic crystal nanocavities

Absorption loss influence on optical characteristics of multilayer distributed Bragg reflector: wavelength-scale analysis by the method of single expression

Contact Info

Product

Resources

About