Publications

Displaying 51 - 75 of 144

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.

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