16% external quantum efficiency from planar microcavity LEDs at 940 nm by precise matching of cavity wavelength

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16% external quantum efficiency from planar microcavity LEDs at 940 nm by precise matching of cavity wavelength

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High efficiency substrate emitting microcavity InGaAs/(Al)GaAs 3 QW LEDs are reported. The use of regrowth for cavity resonance tuning and its effect on device performance, are demonstrated. The best results obtained include external quantum efficiencies of 16%. At 5 mA, 1 mW of optical power is delivered with an intensity of 280 µW/sr.

Inspec keywords: indium compounds; semiconductor quantum wells; integrated optics; light emitting diodes; gallium arsenide; aluminium compounds; III-V semiconductors

Other keywords: cavity wavelength matching; cavity resonance tuning; external quantum efficiency; 5 mA; 940 nm; planar microcavity LEDs; QW LEDs; optical intensity; 16 percent; InGaAs-(Al)GaAs; 1 mW

Subjects: Integrated optics; Semiconductor superlattices, quantum wells and related structures; Light emitting diodes

References

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      • J. Blondelle , H. De Neve , P. Demeester , P. Van Daele , G. Borghs , R. Baets . 6% external quantum efficiency from InGaAs/(Al)GaAs single quantum wellplanar microcavity LEDs. Electron. Lett. , 21 , 1787 - 1789
    2. 2)
      • N.E.J. Hunt , E.F. Schubert , R.F. Kopf , D.L. Sivco , A.Y. Cho , G.J. Zydzik . Increased fiber communications bandwidth from a resonant cavity lightemitting diode emitting at λ = 940 nm. Appl. Phys. Lett. , 19 , 2600 - 2602
    3. 3)
      • H. De Neve , J. Blondelle , R. Baets , P. Demeester , P. Van Daele , G. Borghs . High efficiency planar microcavity LEDs: Comparison of design and experiment. IEEE Photonics Technol. Lett. , 3 , 287 - 289
    4. 4)
      • E.F. Schubert , N.E.J. Hunt , M. Micovic , R.J. Malik , D.L. Sivco , A.Y. Cho , G.J. Zydzik . Highly efficient light-emitting diodes with microcavities. Science , 943 - 945
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