论文信息 - MWIR LED array for high temperature target simulation

MWIR LED array for high temperature target simulation

We report here the light emission from IR interband-cascade (IC) Type-II-super lattice LED structures. The light emission is observed from bottom side through the substrate. We employed two different IC epitaxial structures for the LED experiments consisting of 9 or 18 periods of active super lattice gain regions separated by multilayer injection regions. The light output (and the voltage drop) of the LEDs is observed to increase with decrease of device operating temperature from room temperature (300 K) to liquid helium temperature (4 K). At low temperature the light emission as well as voltage drop has peak like structure with device injection currents. We observed a red shift in peak wavelength of LED emission with higher DC injection current where as blue shift due to pulsed injection current.

Naresh C. Das | G. J. Simonis | M. S. Tobin | Wayne H. Chang

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