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Your search keyword '"Shim, J. I."' showing total 14 results
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14 results on '"Shim, J. I."'

1. Band gap shrinkage in GaInAs/GaInAsP/InP multi-quantum well lasers.

Author

Park, S. H., Shim, J. I., Kudo, K., Asada, M., and Arai, S.

Subjects
*GALLIUM compounds, *QUANTUM wells, *LORENTZ transformations
Abstract

Investigates a band gap shrinkage in both lattice-matched and compressive strained gallium (Ga)-indium (In)-arsenic (As)/GaInAs-phosphorus (P)/InP multi-quantum well lasers. Reason for the difficulty in quantifying the pure band gap shrinkage from the measured broadening; Determination of the broadening of the long wavelength side in the spectrum; Use of Lorentzian function.

Published
1992
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12. Enhancing current spreading by simple electrode pattern design methodology in lateral GaN/InGaN LEDs.

Author

Yun, J. S., Shim, J. I., and Shin, D. S.

Subjects
*ELECTRIC resistors, *SEMICONDUCTOR diodes, *ELECTROLUMINESCENT devices, *OPTICAL communications, *LIGHT sources
Abstract

An electrode pattern design methodology that improves the current uniformity in mesa-structured GaN/InGaN blue light-emitting diodes (LEDs) is investigated. Comparisons between an LED with a new electrode pattern adopting the proposed methodology and an LED with a commercially used electrode are made in view of both current and luminance distributions. Simulations as well as experimental results show that the proposed simple design methodology is very effective to spread current more uniformly in the active layer. [ABSTRACT FROM AUTHOR]

Published
2009
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