000198365 001__ 198365
000198365 005__ 20181203023459.0
000198365 0247_ $$2doi$$a10.1364/Oe.22.004202
000198365 022__ $$a1094-4087
000198365 02470 $$2ISI$$a000332520000054
000198365 037__ $$aARTICLE
000198365 245__ $$aMeasurement and modeling of microlenses fabricated on single-photon avalanche diode arrays for fill factor recovery
000198365 260__ $$aWashington$$bOptical Soc Amer$$c2014
000198365 269__ $$a2014
000198365 300__ $$a12
000198365 336__ $$aJournal Articles
000198365 520__ $$aSingle-photon avalanche diode (SPAD) imagers typically have a relatively low fil factor, i.e. a low proportion of the pixel's surface is light sensitive, due to in-pixel circuitry. We present a microlens array fabricated on a 128x128 single-photon avalanche diode (SPAD) imager to enhance its sensitivity. The benefit and limitations of these light concentrators are studied for low light imaging applications. We present a new simulation software that can be used to simulate microlenses' performance under different conditions and a new non-destructive contact-less method to estimate the height of the microlenses. Results of experiments and simulations are in good agreement, indicating that a gain >10 can be achieved for this particular sensor. (C) 2014 Optical Society of America
000198365 700__ $$0243381$$aPavia, Juan Mata$$g192369$$uUniv Hosp urich USZ, Div Neonatol, BORL, CH-8091 Zurich, Switzerland
000198365 700__ $$aWolf, Martin$$uUniv Hosp urich USZ, Div Neonatol, BORL, CH-8091 Zurich, Switzerland
000198365 700__ $$0240305$$aCharbon, Edoardo$$g146991$$uEcole Polytech Fed Lausanne, Quantum Architecture Grp AQUA, CH-1015 Lausanne, Switzerland
000198365 773__ $$j22$$k4$$q4202-4213$$tOptics Express
000198365 909C0 $$0252106$$pAQUA$$xU12178
000198365 909CO $$ooai:infoscience.tind.io:198365$$pSTI$$particle
000198365 937__ $$aEPFL-ARTICLE-198365
000198365 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000198365 980__ $$aARTICLE