Vladimir Drachev - Profile on Academia.edu (original) (raw)
Papers by Vladimir Drachev
Translation of Nanoantenna Field Enhancement by a Metal-Dielectric Composite Superlens
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
Our simulations show that highly localized field enhancement produced by a periodic array of silv... more Our simulations show that highly localized field enhancement produced by a periodic array of silver nanoantennas can be translated to the far side of a metal-dielectric composite superlens composed of silver and silica components.
Topics in Applied Physics, 2002
Abstract. A novel class of materials, fractal-microcavity composites, that pro-vides unprecented ... more Abstract. A novel class of materials, fractal-microcavity composites, that pro-vides unprecented enhancement of optical responses is developed. These composites combine the energy-concentrating effects due to localization of optical excitations in fractals with the strong morphology-...
2007 Quantum Electronics and Laser Science Conference, 2007
Arrays of silver nano-strips reveal negative effective permeabilities of -1 and -1.7 at 770 nm an... more Arrays of silver nano-strips reveal negative effective permeabilities of -1 and -1.7 at 770 nm and 725 nm. We show that lower silver deposition rate results in stronger magnetic resonances. OCIS codes: (230.3990) Microstructure devices; (160.4760) Optical properties; (999.9999) Meta-materials
Physical Review B, 2001
Local field distributions in random metal-dielectric films near a percolation threshold are exper... more Local field distributions in random metal-dielectric films near a percolation threshold are experimentally studied using scanning near-field optical microscopy ͑SNOM͒. The surface-plasmon oscillations in such percolation films are localized in small nanometer-scale areas, ''hot spots,'' where the local fields are much larger than the field of an incident electromagnetic wave. The spatial positions of the hot spots vary with the wavelength and polarization of the incident beam. Local near-field spectroscopy of the hot spots is performed using our SNOM. It is shown that the resonance quality-factor of hot spots increases from the visible to the infrared. Giant local optical activity associated with chiral plasmon modes has been obtained. The hot spot's large local fields may result in local, frequency and spatially selective photomodification of percolation films.
Optics letters, 2010
Owing to the low-loss and high refractive index variations derived from the basic building block ... more Owing to the low-loss and high refractive index variations derived from the basic building block of bone structure, we, for the first time to our knowledge, demonstrate coherent random lasing action originated from the bone structure infiltrated with laser dye, revealing that bone tissue is an ideal biological material for random lasing. Our numerical simulation shows that random lasers are extremely sensitive to subtle structural changes even at nanoscales and can potentially be an excellent tool for probing nanoscale structural alterations in real time as a novel spectroscopic modality.
Optics express, Jan 9, 2004
Near-field imaging of an engineered double layer structure in transmission mode has shown enhance... more Near-field imaging of an engineered double layer structure in transmission mode has shown enhancement of light intensity through the structure. An array created by an optically thick double layer structure of a total thickness of 165 nm containing twin 50 nm Au layers was imaged using a near-field scanning optical microscope in illumination mode. The resulting transmission image shows an increased local transmission at the position of each particle in the array. This viewable enhancement is due to a nanoantenna effect that is created by a resonant plasmon oscillation between the two layers.
Topics in Applied Physics, 2002
Silver colloidal aggregates of nanoparticles were studied experimentally using optical spectrosco... more Silver colloidal aggregates of nanoparticles were studied experimentally using optical spectroscopy, electron microscopy, near-field optics, and nonlinear optics. Changes in absorption spectra, local structure, and near-field optical response after the irradiation of colloidal fractal aggregates with laser pulse (selective photomodification) were studied. The diameters of the selectively photomodified domains were found to decrease as the laser wavelength increase, in accordance with theory of optics of fractal clusters. Giant enhancements of nonlinear optical responses were found for aggregated nanocomposites compared with nonaggregated. The enhancements are due to excitation of the collective plasmon modes in the aggregates. The plasmon modes are anisotropic and chiral. Nonlinear effects governed by local and nonlocal responses (degenerate four-wave mixing, nonlinear absorption, refraction and gyrotropy, inverse Faraday effect and ellipse self-rotation) were studied.
Conference on Lasers and Electro-Optics 2010, 2010
Public reporting burden for the collection of information is estimated to average 1 hour per resp... more Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
SHA Modeling of Gold Gratings for Oblique Light Incidence
Conference on Lasers and Electro-Optics 2010, 2010
We use spatial harmonic analysis (SHA) to model gold double-strip gratings under obliquely incide... more We use spatial harmonic analysis (SHA) to model gold double-strip gratings under obliquely incident light. The simulation results are compared to experimentally measured values and excellent matches are achieved.
Plasmonics in Biology and Medicine II, 2005
Adaptive silver films (ASFs) have been studied as a substrate for protein microarrays. Vacuum eva... more Adaptive silver films (ASFs) have been studied as a substrate for protein microarrays. Vacuum evaporated silver films fabricated at certain range of evaporation parameters allow fine rearrangement of the silver nanostructure under protein depositions in buffer solution. Proteins restructure and stabilize the ASF to increase the surface-enhanced Raman scattering (SERS) signal from a monolayer of molecules. Preliminary evidence indicates that
Nonlinear susceptibility of metal nanoparticles
Some recent papers [2],[3] report that the nonlinear susceptibility does not depend on quantum si... more Some recent papers [2],[3] report that the nonlinear susceptibility does not depend on quantum size effects. We show that this is not valid when considering the enchancement factor of one particle. Quantum size effects in nanoparticles not only exist but they have dominant contriubution. Our results in good agreement with the model proposed by Rautian [1].
Near-field optical microscopy of plasmonic metamaterials
We have studied the effect of aperture-sample interactions on the near-field optical imaging and ... more We have studied the effect of aperture-sample interactions on the near-field optical imaging and its application for plasmonic metamaterials. Specifically, periodic arrays of paired and single gold nanorods were studied at the near-field using reflection and transmission modes of a near-field scanning optical microscope (NSOM) at various wavelengths and polarizations of light in the visible range. The paired nanorods act
Nanofabricated materials with negative refractive indices at optical wavelengths
The efforts to construct media exhibiting negative refraction have been extended to the optical r... more The efforts to construct media exhibiting negative refraction have been extended to the optical range. In this work we present examples of structures with negative refraction at optical frequencies, including paired nanorods arrays and coupled metal strips. The negative refractive indices in such nanofabricated metamaterials result from plasmon resonances for both the electric and magnetic components of light at overlapping
Cloud Computing Simulation Tools for Nanophotonics at nanoHUB. org
Nanotubes and Nanowires, 2003
Optical properties of metal nanowires and nanowire composite materials are studied experimentally... more Optical properties of metal nanowires and nanowire composite materials are studied experimentally and theoretically. We suggest that a nanowire composite, constructed from parallel pairs of nanowires has both effective magnetic permeability and dielectric permittivity negative in the visible and near-infrared spectral ranges due to resonant excitation of surface plasmon polaritons. Experimental results confirm excitation of surface plasmons polaritons in periodical
ChemInform, 2007
... It is known that the aggregation of even a few particles makes a large difference for ... in ... more ... It is known that the aggregation of even a few particles makes a large difference for ... in DI water 5 times), (c) after incubation with antigen cocktail containing 1nM human interleuikin 10. ... of R6G molecules can potentially be applied to binding detection and thus merits further study. ...
Plasmonics: Metallic Nanostructures and Their Optical Properties, 2003
The interaction of light with nanostructured metal leads to a number of fascinating phenomena, in... more The interaction of light with nanostructured metal leads to a number of fascinating phenomena, including plasmon oscillations that can be harnessed for a variety of cutting-edge applications. Plasmon oscillation modes are the collective oscillation of free electrons in metals under incident light. Previously, surface plasmon modes have been used for communication, sensing, nonlinear optics and novel physics studies. In this report, we describe the scientific research completed on metal-dielectric plasmonic films accomplished during a multi-year Purdue Excellence in Science and Engineering Graduate Fellowship sponsored by Sandia National Laboratories. A variety of plasmonic structures, from random 2D metal-dielectric films to 3D composite metal-dielectric films, have been studied in this research for applications such as surface-enhanced Raman sensing, tunable superlenses with resolutions beyond the diffraction limit, enhanced molecular absorption, infrared obscurants, and other real-world applications.
FE Modeling of Plasmonic Nanoantennas with Realistic 3D Roughness and Distortion
2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010), 2010
Metal nanoantenna arrays are typically designed and simulated using an ideal (smooth) geometry, a... more Metal nanoantenna arrays are typically designed and simulated using an ideal (smooth) geometry, and degraded experimental performance due to surface roughness, interior defects, and other effects are taken into account through a single value, a material `loss factor'; although a 2-D roughness has been introduced in simulations for plasmonic metamagnetics. Here, we aim to treat roughness independently from other types of loss by introducing a controlled roughened geometry into the FE model. The effect of various geometric defects on the resulting electromagnetic model, specifically, transmission and reflection spectra, will be presented.
From low-loss to lossless optical negative-index materials
2006 Conference on Lasers & Electro-Optics/Quantum Electronics and Laser Science Conference (CLEO/QELS), 2006
Practical optical negative index materials based on coupled plasmon resonances must overcome refl... more Practical optical negative index materials based on coupled plasmon resonances must overcome reflection and absorption. Simulations show that matched impedance and compensated losses due to optimized design and gain material, respectively, lead to 100% transmission.
Translation of Nanoantenna Field Enhancement by a Metal-Dielectric Composite Superlens
Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, 2009
Our simulations show that highly localized field enhancement produced by a periodic array of silv... more Our simulations show that highly localized field enhancement produced by a periodic array of silver nanoantennas can be translated to the far side of a metal-dielectric composite superlens composed of silver and silica components.
Topics in Applied Physics, 2002
Abstract. A novel class of materials, fractal-microcavity composites, that pro-vides unprecented ... more Abstract. A novel class of materials, fractal-microcavity composites, that pro-vides unprecented enhancement of optical responses is developed. These composites combine the energy-concentrating effects due to localization of optical excitations in fractals with the strong morphology-...
2007 Quantum Electronics and Laser Science Conference, 2007
Arrays of silver nano-strips reveal negative effective permeabilities of -1 and -1.7 at 770 nm an... more Arrays of silver nano-strips reveal negative effective permeabilities of -1 and -1.7 at 770 nm and 725 nm. We show that lower silver deposition rate results in stronger magnetic resonances. OCIS codes: (230.3990) Microstructure devices; (160.4760) Optical properties; (999.9999) Meta-materials
Physical Review B, 2001
Local field distributions in random metal-dielectric films near a percolation threshold are exper... more Local field distributions in random metal-dielectric films near a percolation threshold are experimentally studied using scanning near-field optical microscopy ͑SNOM͒. The surface-plasmon oscillations in such percolation films are localized in small nanometer-scale areas, ''hot spots,'' where the local fields are much larger than the field of an incident electromagnetic wave. The spatial positions of the hot spots vary with the wavelength and polarization of the incident beam. Local near-field spectroscopy of the hot spots is performed using our SNOM. It is shown that the resonance quality-factor of hot spots increases from the visible to the infrared. Giant local optical activity associated with chiral plasmon modes has been obtained. The hot spot's large local fields may result in local, frequency and spatially selective photomodification of percolation films.
Optics letters, 2010
Owing to the low-loss and high refractive index variations derived from the basic building block ... more Owing to the low-loss and high refractive index variations derived from the basic building block of bone structure, we, for the first time to our knowledge, demonstrate coherent random lasing action originated from the bone structure infiltrated with laser dye, revealing that bone tissue is an ideal biological material for random lasing. Our numerical simulation shows that random lasers are extremely sensitive to subtle structural changes even at nanoscales and can potentially be an excellent tool for probing nanoscale structural alterations in real time as a novel spectroscopic modality.
Optics express, Jan 9, 2004
Near-field imaging of an engineered double layer structure in transmission mode has shown enhance... more Near-field imaging of an engineered double layer structure in transmission mode has shown enhancement of light intensity through the structure. An array created by an optically thick double layer structure of a total thickness of 165 nm containing twin 50 nm Au layers was imaged using a near-field scanning optical microscope in illumination mode. The resulting transmission image shows an increased local transmission at the position of each particle in the array. This viewable enhancement is due to a nanoantenna effect that is created by a resonant plasmon oscillation between the two layers.
Topics in Applied Physics, 2002
Silver colloidal aggregates of nanoparticles were studied experimentally using optical spectrosco... more Silver colloidal aggregates of nanoparticles were studied experimentally using optical spectroscopy, electron microscopy, near-field optics, and nonlinear optics. Changes in absorption spectra, local structure, and near-field optical response after the irradiation of colloidal fractal aggregates with laser pulse (selective photomodification) were studied. The diameters of the selectively photomodified domains were found to decrease as the laser wavelength increase, in accordance with theory of optics of fractal clusters. Giant enhancements of nonlinear optical responses were found for aggregated nanocomposites compared with nonaggregated. The enhancements are due to excitation of the collective plasmon modes in the aggregates. The plasmon modes are anisotropic and chiral. Nonlinear effects governed by local and nonlocal responses (degenerate four-wave mixing, nonlinear absorption, refraction and gyrotropy, inverse Faraday effect and ellipse self-rotation) were studied.
Conference on Lasers and Electro-Optics 2010, 2010
Public reporting burden for the collection of information is estimated to average 1 hour per resp... more Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.
SHA Modeling of Gold Gratings for Oblique Light Incidence
Conference on Lasers and Electro-Optics 2010, 2010
We use spatial harmonic analysis (SHA) to model gold double-strip gratings under obliquely incide... more We use spatial harmonic analysis (SHA) to model gold double-strip gratings under obliquely incident light. The simulation results are compared to experimentally measured values and excellent matches are achieved.
Plasmonics in Biology and Medicine II, 2005
Adaptive silver films (ASFs) have been studied as a substrate for protein microarrays. Vacuum eva... more Adaptive silver films (ASFs) have been studied as a substrate for protein microarrays. Vacuum evaporated silver films fabricated at certain range of evaporation parameters allow fine rearrangement of the silver nanostructure under protein depositions in buffer solution. Proteins restructure and stabilize the ASF to increase the surface-enhanced Raman scattering (SERS) signal from a monolayer of molecules. Preliminary evidence indicates that
Nonlinear susceptibility of metal nanoparticles
Some recent papers [2],[3] report that the nonlinear susceptibility does not depend on quantum si... more Some recent papers [2],[3] report that the nonlinear susceptibility does not depend on quantum size effects. We show that this is not valid when considering the enchancement factor of one particle. Quantum size effects in nanoparticles not only exist but they have dominant contriubution. Our results in good agreement with the model proposed by Rautian [1].
Near-field optical microscopy of plasmonic metamaterials
We have studied the effect of aperture-sample interactions on the near-field optical imaging and ... more We have studied the effect of aperture-sample interactions on the near-field optical imaging and its application for plasmonic metamaterials. Specifically, periodic arrays of paired and single gold nanorods were studied at the near-field using reflection and transmission modes of a near-field scanning optical microscope (NSOM) at various wavelengths and polarizations of light in the visible range. The paired nanorods act
Nanofabricated materials with negative refractive indices at optical wavelengths
The efforts to construct media exhibiting negative refraction have been extended to the optical r... more The efforts to construct media exhibiting negative refraction have been extended to the optical range. In this work we present examples of structures with negative refraction at optical frequencies, including paired nanorods arrays and coupled metal strips. The negative refractive indices in such nanofabricated metamaterials result from plasmon resonances for both the electric and magnetic components of light at overlapping
Cloud Computing Simulation Tools for Nanophotonics at nanoHUB. org
Nanotubes and Nanowires, 2003
Optical properties of metal nanowires and nanowire composite materials are studied experimentally... more Optical properties of metal nanowires and nanowire composite materials are studied experimentally and theoretically. We suggest that a nanowire composite, constructed from parallel pairs of nanowires has both effective magnetic permeability and dielectric permittivity negative in the visible and near-infrared spectral ranges due to resonant excitation of surface plasmon polaritons. Experimental results confirm excitation of surface plasmons polaritons in periodical
ChemInform, 2007
... It is known that the aggregation of even a few particles makes a large difference for ... in ... more ... It is known that the aggregation of even a few particles makes a large difference for ... in DI water 5 times), (c) after incubation with antigen cocktail containing 1nM human interleuikin 10. ... of R6G molecules can potentially be applied to binding detection and thus merits further study. ...
Plasmonics: Metallic Nanostructures and Their Optical Properties, 2003
The interaction of light with nanostructured metal leads to a number of fascinating phenomena, in... more The interaction of light with nanostructured metal leads to a number of fascinating phenomena, including plasmon oscillations that can be harnessed for a variety of cutting-edge applications. Plasmon oscillation modes are the collective oscillation of free electrons in metals under incident light. Previously, surface plasmon modes have been used for communication, sensing, nonlinear optics and novel physics studies. In this report, we describe the scientific research completed on metal-dielectric plasmonic films accomplished during a multi-year Purdue Excellence in Science and Engineering Graduate Fellowship sponsored by Sandia National Laboratories. A variety of plasmonic structures, from random 2D metal-dielectric films to 3D composite metal-dielectric films, have been studied in this research for applications such as surface-enhanced Raman sensing, tunable superlenses with resolutions beyond the diffraction limit, enhanced molecular absorption, infrared obscurants, and other real-world applications.
FE Modeling of Plasmonic Nanoantennas with Realistic 3D Roughness and Distortion
2010 14th Biennial IEEE Conference on Electromagnetic Field Computation (CEFC 2010), 2010
Metal nanoantenna arrays are typically designed and simulated using an ideal (smooth) geometry, a... more Metal nanoantenna arrays are typically designed and simulated using an ideal (smooth) geometry, and degraded experimental performance due to surface roughness, interior defects, and other effects are taken into account through a single value, a material `loss factor'; although a 2-D roughness has been introduced in simulations for plasmonic metamagnetics. Here, we aim to treat roughness independently from other types of loss by introducing a controlled roughened geometry into the FE model. The effect of various geometric defects on the resulting electromagnetic model, specifically, transmission and reflection spectra, will be presented.
From low-loss to lossless optical negative-index materials
2006 Conference on Lasers & Electro-Optics/Quantum Electronics and Laser Science Conference (CLEO/QELS), 2006
Practical optical negative index materials based on coupled plasmon resonances must overcome refl... more Practical optical negative index materials based on coupled plasmon resonances must overcome reflection and absorption. Simulations show that matched impedance and compensated losses due to optimized design and gain material, respectively, lead to 100% transmission.