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Mueller, F. (author), Schouten, R.N. (author), Brauns, M. (author), Gang, T. (author), Lim, W.H. (author), Lai, N.S. (author), Dzurak, A.S. (author), Van der Wiel, W.G. (author), Zwanenburg, F.A. (author)We report the characterisation of printed circuit boards (PCB) metal powder filters and their influence on the effective electron temperature which is as low as 22 mK for a quantum dot in a silicon MOSFET structure in a dilution refrigerator. We investigate the attenuation behaviour (10 MHz–20 GHz) of filter made of four metal powders with a...journal article 2013
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Tan, H. (author), Sivec, L. (author), Yan, B. (author), Santbergen, R. (author), Zeman, M. (author), Smets, A.H.M. (author)We show experimentally that the photocurrent of thin-film hydrogenated microcrystalline silicon (?c-Si:H) solar cells can be enhanced by 4.5?mA/cm2 with a plasmonic back reflector (BR). The light trapping performance is improved using plasmonic BR with broader angular scattering and lower parasitic absorption loss through tuning the size of...journal article 2013
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Van den Ende, D.A. (author), Fischer, H.R. (author), Groen, W.A. (author), Van der Zwaag, S. (author)The meso-scale surface roughness of piezoelectric fiber composites can be manipulated by applying an electric field to a piezocomposite with a polished surface. In the absence of an applied voltage, the tips of the embedded piezoelectric ceramic fibers are below the surface of the piezocomposite and a silicon wafer counter surface rests solely...journal article 2013
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Dogan, I. (author), Kramer, N.J. (author), Westermann, R.H.J. (author), Dohnalova, K. (author), Smets, A.H.M. (author), Verheijen, M.A. (author), Greogorkiewicz, T. (author), Van de Sanden, M.C.M. (author)We demonstrate a method for synthesizing free standing silicon nanocrystals in an argon/silane gas mixture by using a remote expanding thermal plasma. Transmission electron microscopy and Raman spectroscopy measurements reveal that the distribution has a bimodal shape consisting of two distinct groups of small and large silicon nanocrystals with...journal article 2013
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Demontis, V. (author), Sanna, C. (author), Melskens, J. (author), Santbergen, R. (author), Smets, A.H.M. (author), Damiano, A. (author), Zeman, M. (author)Thin oxide interlayers are commonly added to the back reflector of thin-film silicon solar cells to increase their current. To gain more insight in the enhancement mechanism, we tested different back reflector designs consisting of aluminium-doped zinc oxide (ZnO:Al) and/or hydrogenated silicon oxide (SiOx:H) interlayers with different metals ...journal article 2013
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Sharma, K. (author), Ponomarev, M.V. (author), Verheijen, M.A. (author), Kunz, O. (author), Tichelaar, F.D. (author), Van de Sanden, M.C.M. (author), Creatore, M. (author)In this paper, we report on the deposition of amorphous silicon (a-Si:H) films at ultra-high growth rate (11–60?nm/s) by means of the expanding thermal plasma technique, followed by solid-phase crystallization (SPC). Large-grain (?1.5??m) polycrystalline silicon was obtained after SPC of high growth rate (?25?nm/s) deposited a-Si:H films. The...journal article 2012
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Jäger, K. (author), Fischer, M. (author), Van Swaaij, R.A.C.M.M. (author), Zeman, M. (author)We present a scattering model based on the scalar scattering theory that allows estimating far field scattering properties in both transmission and reflection for nano-textured interfaces. We first discuss the theoretical formulation of the scattering model and validate it for nano-textures with different morphologies. Second, we combine the...journal article 2012
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A wide spectral range single-photon avalanche diode fabricated in an advanced 180 nm CMOS technologyMandai, S. (author), Fishburn, M.W. (author), Maruyama, Y. (author), Charbon, E. (author)We present a single-photon avalanche diode (SPAD) with a wide spectral range fabricated in an advanced 180 nm CMOS process. The realized SPAD achieves 20 % photon detection probability (PDP) for wavelengths ranging from 440 nm to 820 nm at an excess bias of 4V, with 30 % PDP at wavelengths from 520 nm to 720 nm. Dark count rates (DCR) are at...journal article 2012
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Mol, J.A. (author), Van der Heijden, J. (author), Verduijn, J. (author), Klein, M. (author), Remacle, F. (author), Rogge, S. (author)Ternary logic has the lowest cost of complexity, here, we demonstrate a CMOS hardware implementation of a ternary adder using a silicon metal-on-insulator single electron transistor. Gate dependent rectifying behavior of a single electron transistor (SET) results in a robust three-valued output as a function of the potential of the single...journal article 2011
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Paul, A. (author), Tettamanzi, G.C. (author), Lee, S. (author), Mehrotra, S.R. (author), Collaert, N. (author), Biesemans, S. (author), Rogge, S. (author), Klimeck, G. (author)Channel conductance measurements can be used as a tool to study thermally activated electron transport in the sub-threshold region of state-of-art FinFETs. Together with theoretical tight-binding (TB) calculations, this technique can be used to understand the dependence of the source-to-channel barrier height (Eb) and the active channel area ...journal article 2011
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Ashkar, R. (author), Schaich, W.L. (author), De Haan, V.O. (author), Van Well, A.A. (author), Dalgliesh, R. (author), Plomp, J. (author), Pynn, R. (author)Neutron spin-echo resolved grazing incidence scattering (SERGIS) measurements performed on a silicon diffraction grating with a rectangular profile were shown in our previous publications to be well explained by dynamical theory calculations. The theory is based on a Bloch wave expansion of the neutron wavefunction in the periodic layer of the...journal article 2011
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Kind, R. (author), Van Swaaij, R.A.C.M.M. (author), Rubinelli, F.A. (author), Solntsev, S. (author), Zeman, M. (author)The performance of hydrogenated amorphous silicon (a-Si:H) p-i-n solar cells is limited, as they contain a relatively high concentration of defects. The dark current voltage (JV) characteristics at low forward voltages of these devices are dominated by recombination processes. The recombination rate depends on the concentration of active...journal article 2011
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Van Oven, J.C. (author), Berwald, F. (author), Berggren, K.K. (author), Kruit, P. (author), Hagen, C.W. (author)This paper demonstrates electron-beam-induced deposition of few-nm-width dense features on bulk samples by using a scanning electron-beam lithography system. To optimize the resultant features, three steps were taken: (1) features were exposed in a repetitive sequence, so as to build up the deposited features gradually across the entire pattern,...journal article 2011
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Erdamar, A.K. (author), Van Leest, M.M. (author), Picken, S.J. (author), Caro, J. (author)We use an elastomer as infill material for a photonic crystal. As a result of the thermal-expansion-induced strongly negative thermal optical coefficient, this material is highly suitable for thermal tuning of the transmission of a cavity. This is demonstrated by global infilling of a hole-type silicon photonic crystal slab and global thermal...journal article 2011
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De Boer, W.D.A.M. (author), Trinh, M.T. (author), Timmerman, D. (author), Schins, J.M. (author), Siebbeles, L.D.A. (author), Greogorkiewicz, T. (author)We report on investigations of optical generation of carriers in Si nanocrystals embedded in SiO2 matrix by time-resolved induced absorption technique. Results obtained for excitation below and above twice the bandgap energy h??<?2Eg and h??>?2Eg show very similar decay characteristics (within ?resolution ? 100 fs). When intensity of the signal...journal article 2011
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Illiberi, A. (author), Kudlacek, P. (author), Smets, A.H.M. (author), Creatore, M. (author), Van de Sanden, M.C.M. (author)We have found that controlled Ar ion bombardment enhances the degradation of a-Si:H based surface passivation of c-Si surfaces. The decrease in the level of surface passivation is found to be independent on the ion kinetic energy (7–70 eV), but linearly proportional to the ion flux (6×1014–6×1015?ions?cm?2?s?1). This result suggests that the ion...journal article 2011
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Lipovek, B. (author), Kr?, J. (author), Isabella, O. (author), Zeman, M. (author), Topi?, M. (author)Diffusive dielectric materials such as white paint have been demonstrated as effective back reflectors in the photovoltaic technology. In this work, a one-dimensional (1D) optical modeling approach for simulation of white paint films is developed and implemented in a 1D optical simulator for thin-film solar cells. The parameters of white paint,...journal article 2010
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De Rooij-Lohmann, V.I.T.A. (author), Veldhuizen, L.W. (author), Zoethout, E. (author), Yakshin, A.E. (author), Van de Kruijs, R.W.E. (author), Thijsse, B.J. (author), Gorgoi, M. (author), Schäfers, F. (author), Bijkerk, F. (author)To enhance the thermal stability, B4C diffusion barrier layers are often added to Mo/Si multilayer structures for extreme ultraviolet optics. Knowledge about the chemical interaction between B4C and Mo or Si, however is largely lacking. Therefore, the chemical processes during annealing up to 600?°C of a Mo/B4C/Si layered structure have been...journal article 2010
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Zhang, W. (author), Khosropanah, P. (author), Gao, J.R. (author), Bansal, T. (author), Klapwijk, T.M. (author), Miao, W. (author), Shi, S.C. (author)We report the measured sensitivities of a superconducting NbN hot electron bolometer (HEB) heterodyne receiver at 5.25 THz. Terahertz (THz) radiation is quasioptically coupled to a HEB mixer with a lens and a spiral antenna. Using a measurement setup with black body calibration sources and a beam splitter in vacuo, and an antireflection coated...journal article 2010
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Testa, G. (author), Huang, Y. (author), Sarro, P.M. (author), Zeni, L. (author), Bernini, R. (author)The feasibility of an integrated silicon optofluidic ring resonator is demonstrated. Liquid core antiresonant reflecting optical waveguides are used to realize a rectangular ring resonator with a multimode interference liquid core coupler between the ring and the bus waveguide. In this configuration the same waveguide used to confine the light...journal article 2010