Radek Kalousek - Academia.edu (original) (raw)
Papers by Radek Kalousek
Precision Engineering, 2015
ABSTRACT Motion of a stick-slip piezo actuator is generally controlled by the parameters related ... more ABSTRACT Motion of a stick-slip piezo actuator is generally controlled by the parameters related to its mechanical design and characteristics of the driving pulses applied to piezoceramic shear plates. The goal of the proposed optimization method is to find the driving pulse parameters leading to the fastest and the most reliable actuator operation. In the paper the method is tested on a rotary stick-slip piezo actuating system utilized in an atomic force microscope.
Optics express, Jan 30, 2012
An analytical model of the response of a free-electron gas within the nanorod to the incident ele... more An analytical model of the response of a free-electron gas within the nanorod to the incident electromagnetic wave is developed to investigate the optical antenna problem. Examining longitudinal oscillations of the free-electron gas along the antenna nanorod a simple formula for antenna resonance wavelengths proving a linear scaling is derived. Then the nanorod polarizability and scattered fields are evaluated. Particularly, the near-field amplitudes are expressed in a closed analytical form and the shift between near-field and far-field intensity peaks is deduced.
Physical Review B, 2003
ABSTRACT
Surface and Interface Analysis, 2000
In this paper the basic principles of non-contact scanning force microscopy (SFM) are explained. ... more In this paper the basic principles of non-contact scanning force microscopy (SFM) are explained. The major long-range forces acting between a tip and a sample, and consequently the changes of vibration characteristics with the tip-sample distance, are discussed. To estimate the resolution limits of the non-contact method, the motion of a vibrating silicon cantilever above testing silicon nanostructure models was simulated numerically. This was done both in the mode of constant height and of constant force. To simulate the real behaviour of the tip in the mode of constant force, we included into our calculations the feedback loop. It was shown that by using long-range van der Waals forces an atomic lattice periodicity and individual adatoms can be recognized by non-contact SFM only when the equilibrium tip-surface distance is~1.0 nm.
Physical Review B, 2009
Miroslav Bartoík, David koda, Ondřej Tomanec, Radek Kalousek, Pavel Jánský, Jakub Zlámal, Jiří ... more Miroslav Bartoík, David koda, Ondřej Tomanec, Radek Kalousek, Pavel Jánský, Jakub Zlámal, Jiří Spousta, Petr Dub, and Tomá ikola ... M. Bartosik, D. Skoda, O. Tomanec, R. Kalousek, P. Jansky, J. Zlamal, J. Spousta, and T. Sikola, J. Phys ... M. Binggeli and CM Mate, Appl. ...
Nano Letters, 2013
The tailoring of electromagnetic near-field properties is the central task in the field of nanoph... more The tailoring of electromagnetic near-field properties is the central task in the field of nanophotonics. In addition to 2D optics for optical nanocircuits, confined and enhanced electric fields are utilized in detection and sensing, photovoltaics, spatially localized spectroscopy (nanoimaging), as well as in nanolithography and nanomanipulation. For practical purposes, it is necessary to develop easy-to-use methods for controlling the electromagnetic near-field distribution. By imaging optical near-fields using a scanning near-field optical microscope, we demonstrate that surface plasmon polaritons propagating from slits along the metal-dielectric interface form tunable interference patterns. We present a simple way how to control the resulting interference patterns both by variation of the angle between two slits and, for a fixed slit geometry, by a proper combination of laser beam polarization and inhomogeneous far-field illumination of the structure. Thus the modulation period of interference patterns has become adjustable and new variable patterns consisting of stripelike and dotlike motifs have been achieved, respectively.
Journal of Physics: Conference Series, 2007
ABSTRACT In this paper the influence of relative humidity on fabrication of nanostructures at GaA... more ABSTRACT In this paper the influence of relative humidity on fabrication of nanostructures at GaAs (100) surfaces by local anodic oxidation (LAO) is reported. The attention was paid both to the dimensions of oxide nanolines prepared at different relative humidities for tip-surface voltages of 6 - 9 V and tip speeds of 10 - 200 nm/s, and to the profiles corresponding to line trenches (etched in HCl after the nanoxidation). Contrary to the expectations the height and the half-width of oxide nanolines did not increase with relative humidity in the whole interval from 35% to 90%, but for lower relative humidities (< 50%) the lines were comparable in size to those prepared at 90%. However, this was accompanied with instabilities in the oxidation process resulting most probably from enhanced size variations of the water meniscus between the tip and the surface at these low humidities.
Applied Surface Science, 2006
ABSTRACT
Applied Physics Letters, 2009
ABSTRACT
Applied Physics Letters, 2012
Precision Engineering, 2015
ABSTRACT Motion of a stick-slip piezo actuator is generally controlled by the parameters related ... more ABSTRACT Motion of a stick-slip piezo actuator is generally controlled by the parameters related to its mechanical design and characteristics of the driving pulses applied to piezoceramic shear plates. The goal of the proposed optimization method is to find the driving pulse parameters leading to the fastest and the most reliable actuator operation. In the paper the method is tested on a rotary stick-slip piezo actuating system utilized in an atomic force microscope.
Optics express, Jan 30, 2012
An analytical model of the response of a free-electron gas within the nanorod to the incident ele... more An analytical model of the response of a free-electron gas within the nanorod to the incident electromagnetic wave is developed to investigate the optical antenna problem. Examining longitudinal oscillations of the free-electron gas along the antenna nanorod a simple formula for antenna resonance wavelengths proving a linear scaling is derived. Then the nanorod polarizability and scattered fields are evaluated. Particularly, the near-field amplitudes are expressed in a closed analytical form and the shift between near-field and far-field intensity peaks is deduced.
Physical Review B, 2003
ABSTRACT
Surface and Interface Analysis, 2000
In this paper the basic principles of non-contact scanning force microscopy (SFM) are explained. ... more In this paper the basic principles of non-contact scanning force microscopy (SFM) are explained. The major long-range forces acting between a tip and a sample, and consequently the changes of vibration characteristics with the tip-sample distance, are discussed. To estimate the resolution limits of the non-contact method, the motion of a vibrating silicon cantilever above testing silicon nanostructure models was simulated numerically. This was done both in the mode of constant height and of constant force. To simulate the real behaviour of the tip in the mode of constant force, we included into our calculations the feedback loop. It was shown that by using long-range van der Waals forces an atomic lattice periodicity and individual adatoms can be recognized by non-contact SFM only when the equilibrium tip-surface distance is~1.0 nm.
Physical Review B, 2009
Miroslav Bartoík, David koda, Ondřej Tomanec, Radek Kalousek, Pavel Jánský, Jakub Zlámal, Jiří ... more Miroslav Bartoík, David koda, Ondřej Tomanec, Radek Kalousek, Pavel Jánský, Jakub Zlámal, Jiří Spousta, Petr Dub, and Tomá ikola ... M. Bartosik, D. Skoda, O. Tomanec, R. Kalousek, P. Jansky, J. Zlamal, J. Spousta, and T. Sikola, J. Phys ... M. Binggeli and CM Mate, Appl. ...
Nano Letters, 2013
The tailoring of electromagnetic near-field properties is the central task in the field of nanoph... more The tailoring of electromagnetic near-field properties is the central task in the field of nanophotonics. In addition to 2D optics for optical nanocircuits, confined and enhanced electric fields are utilized in detection and sensing, photovoltaics, spatially localized spectroscopy (nanoimaging), as well as in nanolithography and nanomanipulation. For practical purposes, it is necessary to develop easy-to-use methods for controlling the electromagnetic near-field distribution. By imaging optical near-fields using a scanning near-field optical microscope, we demonstrate that surface plasmon polaritons propagating from slits along the metal-dielectric interface form tunable interference patterns. We present a simple way how to control the resulting interference patterns both by variation of the angle between two slits and, for a fixed slit geometry, by a proper combination of laser beam polarization and inhomogeneous far-field illumination of the structure. Thus the modulation period of interference patterns has become adjustable and new variable patterns consisting of stripelike and dotlike motifs have been achieved, respectively.
Journal of Physics: Conference Series, 2007
ABSTRACT In this paper the influence of relative humidity on fabrication of nanostructures at GaA... more ABSTRACT In this paper the influence of relative humidity on fabrication of nanostructures at GaAs (100) surfaces by local anodic oxidation (LAO) is reported. The attention was paid both to the dimensions of oxide nanolines prepared at different relative humidities for tip-surface voltages of 6 - 9 V and tip speeds of 10 - 200 nm/s, and to the profiles corresponding to line trenches (etched in HCl after the nanoxidation). Contrary to the expectations the height and the half-width of oxide nanolines did not increase with relative humidity in the whole interval from 35% to 90%, but for lower relative humidities (< 50%) the lines were comparable in size to those prepared at 90%. However, this was accompanied with instabilities in the oxidation process resulting most probably from enhanced size variations of the water meniscus between the tip and the surface at these low humidities.
Applied Surface Science, 2006
ABSTRACT
Applied Physics Letters, 2009
ABSTRACT
Applied Physics Letters, 2012