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Improved mid-infrared interband cascade light-emitting devices

机译:改进的中红外带间级联发光器件

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We report interband cascade light-emitting devices (ICLEDs) emitting at peak wavelengths of 3.1 to 3.2 μm that display higher maximum output powers, radiances, and efficiencies than any earlier midwave-infra-red LEDs when operated at 10 to 105℃. To enhance the output power, we split the ICLED's 22 active stages into four groups positioned at antinodes of the optical field so that the emission interferes constructively when reflected at near-normal incidence from the metal contact of the epitaxial-side-down mounted device. At an applied bias of 9.6 V and injection current of 0.6 A, an ICLED with mesa diameter of 400 μm produces 3.1 mW of continuous-wave output power at T = 10℃, which corresponds to a radiance of 0.79 W/cm~2/sr.
机译:我们报告的带间级联发光器件(ICLED)在3.1至3.2μm的峰值波长处发射,在10至105℃的温度下工作时,其显示的最大输出功率,辐射率和效率高于任何早期的中波红外LED。为了提高输出功率,我们将ICLED的22个有源级分为四组,分别位于光场的波腹处,这样,当从外延面朝下安装的设备的金属触点以接近法线入射的角度反射时,发射会产生相长干涉。在9.6 V的施加偏压和0.6 A的注入电流下,台面直径为400μm的ICLED在T = 10℃时产生3.1 mW的连续波输出功率,对应的辐射度为0.79 W / cm〜2 / sr。

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