Research Topics  Selim OlcumSummaryAffiliation: Bilkent University Country: Turkey Publications
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Publications
 Optimization of the gainbandwidth product of capacitive micromachined ultrasonic transducersSelim Olcum
Electrical and Electronics Engineering Department, Bilkent University, Ankara Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 52:22119. 2005..In particular, the effect of a shunt inductor in the gainbandwidth product is investigated. Design tools are introduced, which are used to determine optimal dimensions of cMUTs with the specified frequency or gain response...  Tunable surface plasmon resonance on an elastomeric substrateSelim Olcum
Bilkent University, Electrical and Electronics Engineering Department, Ankara, Turkey
Opt Express 17:85427. 2009..It's been demonstrated that the Raman signal can be maximized by applying an external mechanical strain to the elastomeric grating...  Deepcollapse operation of capacitive micromachined ultrasonic transducersSelim Olcum
Bilkent University, Electrical and Electronics Engineering Department, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 58:247583. 2011..8 MHz with a 106% fractional bandwidth at the surface of the transducer with a collapse voltage of 35 V, when the pulse amplitude is 160 V. The experimental results are verified using transient FEM simulations...  An equivalent circuit model for transmitting capacitive micromachined ultrasonic transducers in collapse modeSelim Olcum
Bilkent University, Electrical and Electronics Engineering Department, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 58:146877. 2011..The circuit model is in good agreement with experimental results of pulse excitation applied to fabricated CMUTs. The model is suitable as a powerful design and optimization tool for collapsed and uncollapsed CMUTs...  Parametric linear modeling of circular cMUT membranes in vacuumHayrettin Koymen
Department, Bilkent University, Ankara, 06800 Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 54:122939. 2007..Equivalent circuit model parameters can be found from material properties and membrane dimensions without a need for finite element simulation...  Nonlinear modeling of an immersed transmitting capacitive micromachined ultrasonic transducer for harmonic balance analysisH Kagan Oguz
Electronics Engineering Department, Bilkent University, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 57:43847. 2010..We observed much better agreement between FEM and the proposed equivalent model, compared with the conventional model...  An improved lumped element nonlinear circuit model for a circular CMUT cellHayrettin Koymen
Electrical and Electronics Engineering Department, Bilkent University, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 59:17919. 2012..The model can be implemented in circuit simulation tools and model predictions are in excellent agreement with finite element method simulations...  Radiation impedance of an array of circular capacitive micromachined ultrasonic transducersMuhammed N Senlik
Electrical and Electronics Engineering Department, Bilkent University, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 57:96976. 2010..25 wavelengths maximizes the radiation resistance, if the membranes are not too thin. It is also found that excitation of nonsymmetric modes may reduce the radiation resistance in immersion applications...  Reducing anchor loss in micromechanical extensional mode resonatorsVahdettin Taş
Electronics Engineering Department, Bilkent University, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 57:44854. 2010..The electrical model gives results consistent with the finite element simulations. The proposed resonator is expected to have a very small anchor loss resulting in a very high Q...  Radiation impedance of collapsed capacitive micromachined ultrasonic transducersAlper Ozgurluk
Electrical and Electronics Engineering Department, Bilkent University, Ankara, Turkey
IEEE Trans Ultrason Ferroelectr Freq Control 59:13018. 2012....