Publications

Displaying 26 - 50 of 73

Nondegenerate Parametric Resonance in Large Ensembles of Coupled Micromechanical Cantilevers with Varying Natural Frequencies

December 28, 2018

Author(s)

Christopher B. Wallin, Roberto De Alba, Daron Westly, Glenn Holland, Scott Grutzik, Richard Rand, Alan Zehnder, Vladimir Aksyuk, Slava Krylov, Robert Ilic

We investigate the collective dynamics and nondegenerate parametric resonance (NPR) of coplanar, interdigitated arrays of microcantilevers distinguished by their cantilevers having linearly expanding lengths and thus varying natural frequencies. Within a

Photonic waveguide to free-space Gaussian beam extreme mode converter

October 10, 2018

Author(s)

Sangsik Kim, Daron Westly, Brian J. Roxworthy, Qing Li, Alexander Yulaev, Kartik Srinivasan, Vladimir Aksyuk

Integration of photonic chips with atomic, micromechanical, chemical and biological systems can advance science and open many possibilities in chip-scale devices and technology. Compact photonic structures for direct coupling of light between high-index

Subdiffraction spatial mapping of nanomechanical modes using a plasmomechanical system

July 31, 2018

Author(s)

Brian Roxworthy, Sreya Vangara, Vladimir Aksyuk

Plasmomechanical systems - formed by introducing a mechanically compliant gap between metallic nanostructures - produce large optomechanical interactions that can be localized to deep subwavelength volumes. This unique ability opens a new path to study

Subnanometer localization accuracy in widefield optical microscopy

July 11, 2018

Author(s)

Craig R. Copeland, Jon C. Geist, Craig D. McGray, Vladimir A. Aksyuk, James A. Liddle, Bojan R. Ilic, Samuel M. Stavis

The common assumption that precision is the limit of accuracy in localization microscopy and the typical absence of comprehensive calibration of optical microscopes lead to a widespread issue - overconfidence in measurement results with nanoscale

Nanoscale tuning fork cavity optomechanical transducers with design-enabled frequency tuning and temperature compensation

June 7, 2018

Author(s)

Rui Zhang, Robert Ilic, Yuxiang Liu, Vladimir Aksyuk

In this work, we design, fabricate and characterize monolithic, nanoscale Si3N4 tuning fork cavity optomechanical transducers with design enabled tuning of mechanical resonant frequencies and passive temperature compensation. Both frequency tuning and

Optomechanical transducer-based soft and high frequency nanoscale cantilever for atomic force microscopy

June 2, 2018

Author(s)

Sang M. An, Jie Zou, Glenn Holland, Jungseok Chae, Andrea Centrone, Vladimir Aksyuk

We introduce an optomechanical transducer-based nanoscale cantilever for atomic force microscope (AFM). The high optical quality factor of the microdisk resonator enables detection of the nanoscale cantilever motion with high sensitivity. A low stiffness

Electrically tunable plasmomechanical oscillators for localized modulation, transduction, and amplification

January 18, 2018

Author(s)

Brian J. Roxworthy, Vladimir A. Aksyuk

Precision shaping of constituent elements allows construction of metamaterials with unusual physical properties. Similarly, judicious patterning of nanoscale geometries can be used to enhance coupling between distinct physical domains, such as photons and

Quantitative chemical analysis at the nanoscale using the photothermal induced resonance technique

December 19, 2017

Author(s)

Georg Ramer, Vladimir Aksyuk, Andrea Centrone

Photothermal induced resonance (PTIR) is a scanning probe technique that provides sample composition information with a lateral resolution down to 20 nm. Interest in PTIR stems from its ability to identify unknown samples at the nanoscale thanks, in first

Two-dimensional imaging and modification of nanophotonic resonator modes using a focused ion beam

November 20, 2017

Author(s)

William R. McGehee, Thomas Michels, Vladimir A. Aksyuk, Jabez J. McClelland

We report 2D imaging of the optical mode intensity of silicon microdisk resonators using a pulsed, low-energy focused ion beam of Li+. The ion beam locally modifies the resonator structure, causing temporally varying spectroscopic shifts of the optical

Internet of things: Sensing without power

October 11, 2017

Author(s)

Vladimir A. Aksyuk

A recent advance in micromechanical sensing of thermal radiation is reviewed.

Nanophotonic atomic force microscope transducers enable chemical composition and thermal conductivity measurements at the nanoscale

September 13, 2017

Author(s)

Jungseok Chae, Sangmin An, Georg Ramer, Vitalie Stavila, Glenn Holland, Yohan Yoon, Alec Talin, Mark Allendorf, Vladimir Aksyuk, Andrea Centrone

The atomic force microscope (AFM) offers a rich observation window on the nanoscale, yet many dynamic phenomena are too fast and too weak for direct detection, urging measurement innovation. Integrated cavity-optomechanics is revolutionizing

Optical probe for nondestructive wafer-scale characterization of photonic elements

January 27, 2017

Author(s)

Thomas Michels, Vladimir A. Aksyuk

This article describes fabrication and operation of a microfabricated photonic waveguide loop probe for nondestructive evanescent coupling and localized testing of nanophotonic devices and circuits. A microfabricated 300 nm x 260 nm silicon (Si) waveguide

Fabrication Process for an Optomechanical Transducer Platform with Integrated Actuation

December 8, 2016

Author(s)

Thomas Michels, Ivo Rangelow, Vladimir Aksyuk

This article reports a process for batch fabrication of a fiber pigtailed optomechanical transducer platform with overhanging cantilevers. The process combines nanophotonic, mechanical, and electrical elements with a combination of surface and bulk

Nanomechanical motion transduction with a scalable localized gap plasmon architecture

December 6, 2016

Author(s)

Brian J. Roxworthy, Vladimir Aksyuk

Measurement of motion is at the core of scientific advance. From the early Greeks mapping the motion of celestial bodies to molecular analysis, development of increasingly precise motion detection has revolutionized our understanding of the natural world.

Nanolithography Toolbox

October 19, 2016

Author(s)

Bojan R. Ilic, Krishna Coimbatore Balram, Daron A. Westly, Marcelo I. Davanco, Karen E. Grutter, Qing Li, Thomas Michels, Christopher H. Ray, Liya Yu, Neal A. Bertrand, Samuel M. Stavis, Vladimir A. Aksyuk, James A. Liddle, Brian A. Bryce, Nicolae Lobontiu, Yuxiang Liu, Meredith Metzler, Gerald Lopez, David Czaplewski, Leonidas Ocola, Pavel Neuzil, Vojtech Svatos, Slava Krylov, Christopher B. Wallin, Ian J. Gilbert, Kristen A. Dill, Richard J. Kasica, Kartik A. Srinivasan, Gregory Simelgor, Juraj Topolancik

The Nanolithography Toolbox

October 19, 2016

Author(s)

Krishna Coimbatore Balram, Daron Westly, Marcelo I. Davanco, Karen E. Grutter, Qing Li, Thomas Michels, Christopher H. Ray, Richard Kasica, Christopher B. Wallin, Ian J. Gilbert, Brian A. Bryce, Gregory Simelgor, Juraj Topolancik, Nicolae Lobontiu, Yuxiang Liu, Pavel Neuzil, Vojtech Svatos, Kristen A. Dill, Neal A. Bertrand, Meredith Metzler, Gerald Lopez, David Czaplewski, Leonidas Ocola, Kartik Srinivasan, Samuel Stavis, Vladimir Aksyuk, James Alexander Liddle, Slava Krylov, Robert Ilic

This article describes a platform-independent software package for scripted lithography pattern layout generation and complex processing. The Nanolithography Toolbox, developed at the Center for Nanoscale Science and Technology (CNST) at the National

Subdiffraction optical motion transduction using a scalable plasmomechanical platform

October 16, 2016

Author(s)

Brian J. Roxworthy, Vladimir Aksyuk

We present a scalable platform for producing a new class of reconfigurable plasmonic devices. Using localized-gap plasmon resonators exhibiting large quality factors, we demonstrate sensitive, plasmon-based measurement of mechanical motion from a deep

Cantilever array with optomechanical read-out and integrated actuation for simultaneous high sensitivity force detection

September 14, 2016

Author(s)

Thomas Michels, Ivo W. Rangelow, Vladimir Aksyuk

We present an on-chip cavity optomechanical cantilever array with integrated actuation, that combines high measurement bandwidth and very low displacement noise floor with compactness, robustness, small size, and potential for low cost batch fabrication

Transfer of motion through a microelectromechanical linkage at nanometer and microradian scales

September 12, 2016

Author(s)

Craig R. Copeland, Craig D. McGray, Jon C. Geist, Vladimir A. Aksyuk, Samuel M. Stavis

Mechanical linkages are fundamentally important for the transfer of motion through assemblies of parts to perform work. Whereas their behavior in macroscale systems is well understood, there are open questions regarding the performance and reliability of

Cavity optical transducer platform with integrated actuation for multiple sensing applications

June 4, 2016

Author(s)

Thomas Michels, Vladimir Aksyuk

We present an on-chip cavity optomechanical transducer platform that combines high measurement bandwidth and very low displacement noise floor with compactness, robustness, small size, and potential for low cost batch fabrication inherent in micro- electro

Imaging Nanophotonic Modes of Microresonators using a Focused Ion Beam

January 15, 2016

Author(s)

Kevin A. Twedt, Jie J. Zou, Marcelo I. Davanco, Kartik A. Srinivasan, Jabez J. McClelland, Vladimir A. Aksyuk

Optical microresonators have proven powerful in a wide range of applications, including cavity quantum electrodynamics, biosensing, microfludics, and cavity optomechanics. Their performance depends critically on the exact distribution of optical energy

High-Resolution Imaging and Spectroscopy at High Pressure: A Novel Liquid Cell for the Transmission Electron Microscope

December 9, 2015

Author(s)

Mihaela M. Tanase, Jonathan P. Winterstein, Renu Sharma, Vladimir A. Aksyuk, Glenn E. Holland, James A. Liddle

We demonstrate quantitative core-loss electron energy-loss spectroscopy of iron oxide nanoparticles and imaging resolution of Ag nanoparticles in liquid down to 0.24 nm, in both transmission and scanning-transmission modes, in a novel, monolithic liquid

NIST on a Chip: Realizing SI units with microfabricated alkali vapour cells

October 16, 2015

Author(s)

John E. Kitching, Elizabeth A. Donley, Svenja A. Knappe, Matthew T. Hummon, Argyrios Dellis, Jeffrey A. Sherman, Kartik A. Srinivasan, Vladimir A. Aksyuk, Qiliang Li, Daron A. Westly, Brian J. Roxworthy, Amit Lal

We describe several ways in which microfabricated alkali atom vapour cells might potentially be used to accurately realize a variety of SI units, including the second, the meter, the kelvin, the ampere and the volt, in a compact, low-cost chip-scale

Integrated tuning fork nanocavity optomechanical transducers

September 28, 2015

Author(s)

Rui Zhang, Chaoyang Ti, Marcelo I. Davanco, Yundong Ren, Vladimir Aksyuk, Yuxiang Liu, Kartik Srinivasan

Diffraction limited focusing and directing of gap plasmons by a metal-dielectric-metal lens

August 24, 2015

Author(s)

Brian S. Dennis, David Czaplewski, Michael Haftel, Daniel Lopez, Girsh Blumberg, Vladimir Aksyuk

Passive optical elements can play key roles in photonic applications such as plasmonic integrated circuits. Here we experimentally demonstrate passive gap-plasmon focusing and directing in two-dimensions. This is accomplished using a high numerical

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