Visible-Light Communications Using a CMOS-Controlled Micro-Light-Emitting-Diode Array
Visible-Light Communications Using a CMOS-Controlled Micro-Light-Emitting-Diode Array
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DOI：
10.1109/jlt.2011.2175090
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发表时间：
2012-01-01
影响因子：
4.7
通讯作者：
Dawson, Martin D.
中科院分区：
文献类型：
--
作者：
McKendry, Jonathan J. D.;Massoubre, David;Dawson, Martin D.
我们报告的高频调制的个别像素在8 × 8阵列的III族氮化物为基础的微像素的发光二极管，其中阵列内的像素范围从14到84 μ m的直径。器件的峰值发射波长分别为370、405、450和520 nm。较小面积的微LED像素通常表现出比它们的较大面积的对应物更高的调制带宽，这归因于它们在更高电流密度下被驱动的能力。这些器件的最高光学-3 dB调制带宽超过400 MHz，据我们所知，这是GaN LED的最高带宽。这些器件还集成了互补金属氧化物半导体（CMOS）驱动器阵列芯片，允许对单个微型LED像素进行简单的计算机控制。集成的微LED/CMOS像素的带宽被示出为高达185 MHz;使用开关键控非归零调制，使用450 nm发射的24 μ m直径CMOS控制的微LED，以高达512 Mbit/s的比特率的数据传输被证明具有小于1 × 10（-10）的比特错误率。由于CMOS芯片允许多达16个独立的数据输入，该器件展示了使用CMOS控制的micro-LED进行多千兆位/秒并行数据传输的潜力。
We report the high-frequency modulation of individual pixels in 8 x 8 arrays of III-nitride-based micro-pixellated light-emitting diodes, where the pixels within the array range from 14 to 84 mu m in diameter. The peak emission wavelengths of the devices are 370, 405, 450 and 520 nm, respectively. Smaller area micro-LED pixels generally exhibit higher modulation bandwidths than their larger area counterparts, which is attributed to their ability to be driven at higher current densities. The highest optical -3 dB modulation bandwidths from these devices are shown to be in excess of 400 MHz, which, to our knowledge, are the highest bandwidths yet reported for GaN LEDs. These devices are also integrated with a complementary metal-oxide-semiconductor (CMOS) driver array chip, allowing for simple computer control of individual micro-LED pixels. The bandwidth of the integrated micro-LED/CMOS pixels is shown to be up to 185 MHz; data transmission at bit rates up to 512 Mbit/s is demonstrated using on-off keying non return-to-zero modulation with a bit-error ratio of less than 1 X 10(-10) using a 450 nm-emitting 24 mu m diameter CMOS-controlled micro-LED. As the CMOS chip allows for up to 16 independent data inputs, this device demonstrates the potential for multi-Gigabit/s parallel data transmission using CMOS-controlled micro-LEDs.