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Calculation of the current response of the spatially modulated light CMOS detector

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5 Author(s)
Genoe, J. ; ETRO-IMEC Dept., Vrije Univ., Brussels, Belgium ; Coppee, D. ; Stiens, J.H. ; Vonekx, R.A.
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We present an analytical model that allows to calculate the current response of a spatially modulated light CMOS detector (SML-detector) and compare this response with the response of a traditional CMOS photodetector. It is shown that the SML detector already yields a three orders of magnitude faster response time than a traditional CMOS detector in a 0.25 μm CMOS technology. This response time will further decrease as CMOS technology evolves. This analytical expression is compared with a numerical solution of the diffusion equation and with experimental results. Both show an excellent correspondence. Therefore we can conclude that the SML-detector is the solution of choice for cheap, CMOS-compatible receivers in integrated opto-electronic systems

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Electron Devices, IEEE Transactions on  (Volume:48 ,  Issue: 9 )