Submissions from 2020
Search for a charged Higgs boson decaying into top and bottom quarks in events with electrons or muons in proton-proton collisions at √s = 13 TeV, The CMS Collaboration, A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, T. Bergauer, and Julie M. Hogan
A search is presented for a charged Higgs boson heavier than the top quark, produced in association with a top quark, or with a top and a bottom quark, and decaying into a top-bottom quark-antiquark pair. The search is performed using proto...
Search for electroweak production of a vector-like T quark using fully hadronic final states, The CMS Collaboration, A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, T. Bergauer, and Julie M. Hogan
A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a top or bottom quark, using proton-proton collision data at s = 13 TeV collected by the CMS experiment at the LHC in 20...
Search for bottom-type, vectorlike quark pair production in a fully hadronic final state in proton-proton collisions at s =13 TeV, The CMS Collaboration, A. M. Sirunyan, A. Tumasyan, W. Adam, F. Ambrogi, T. Bergauer, Julie M. Hogan, and S Johnson
A search is described for the production of a pair of bottom-type vectorlike quarks (VLQs), each decaying into a b or b¯ quark and either a Higgs or a Z boson, with a mass greater than 1000 GeV. The analysis is based on data from proton-pro...
Submissions from 2019
Free-space optical time transfer between an atomic frequency standard and a simple optical clock, Matthew S. Bigelow, Rafe Guidice, Kyle Martin, Andrew J. Metcalf, and Nathan Lemke
We present a tabletop demonstration of free-space time-frequency transfer from a compact optical rubidium atomic frequency standard to stabilize a clock based on a fiber laser locked to fiber-delay line compared with a cavity-stabilized las...
High-speed imaging of surface-enhanced Raman scattering fluctuations from individual nanoparticles, Nathan C. Lindquist, Carlos Diego L. de Albuquerque, Regivaldo G. Sobral-Filho, Irina Paci, and Alexandre G. Brolo
The concept of plasmonic hotspots is central to the interpretation of the surface-enhanced Raman scattering (SERS) effect. Although plasmonic hotspots are generally portrayed as static features, single-molecule SERS (SM-SERS) is marked by c...
Frequency shifts due to Stark effects on a rubidium two-photon transition, Kyle W. Martin, Benjamin Stuhl, Jon Eugenio, Marianna S. Safronova, Gretchen Phelps, John H. Burke, and Nathan D. Lemke
The 5S1/2→5D5/2 two-photon transition in Rb is of interest for the development of a compact optical atomic clock. Here we present a rigorous calculation of the 778.1-nm ac Stark shift [2.30(4)×10-13(mW/mm2)-1] that is in good agreement with...
Characterizing the Optical Trapping of Rare Isotopes by Monte Carlo Simulation, D S. Potterveld, S A. Fromm, K G. Bailey, M Bishof, D W. Booth, and Nathan D. Lemke
Optical trapping techniques are an efficient way to probe limited quantities of rare isotopes. In order to achieve the highest possible measurement precision, it is critical to optimize the optical trapping efficiency. This work presents th...
Real-Time Sensing with Patterned Plasmonic Substrates and a Compact Imager Chip, Spencer T. Seiler, Isabel S. Rich, and Nathan C. Lindquist
Optical sensing is an important research field due to its proven ability to be extremely sensitive, nondestructive, and applicable to sensing a wide range of chemical, thermal, electric, or magnetic phenomena. Beyond traditional optical sen...
Submissions from 2018
Holographic plasmonic tweezing for dynamic trapping and manipulation, Preston R. Huft, Joshua D. Kolbow, Jonathan T. Thweatt, John J. McCauley, and Nathan C. Lindquist
We demonstrate dynamic trapping and computer-controlled manipulation of nanoparticles with plasmonic holograms. Research into plasmonic trapping has been motivated by its potential for enhanced optical forces. However, while holographic opt...
Digital plasmonic holography, Joseph W. Nelson, Greta R. Knefelkamp, Alexandre G. Brolo, and Nathan C. Lindquist
We demonstrate digital plasmonic holography for direct in-plane imaging with propagating surface-plasmon waves. Imaging with surface plasmons suffers from the lack of simple in-plane lenses and mirrors. Lens-less digital holography techniqu...
Digital plasmonic holography, Joseph W. Nelson, Greta R. Knefelkamp, Alexandre G. Brolo, and Nathan C. Lindquist
Direct two-dimensional imaging with surface plasmons suffers from the lack of simple two-dimensional lenses. Here we show that digital holographic microscopy techniques can be used for lens-less in-plane surface imaging with propagating pla...
Web-Based Interactive Video Activities for Undergraduate Advanced Laboratories, Robert B. Teese, Keith R. Stein, Chad W. Hoyt, Nathan C. Lindquist, and Sara A. Wyse
Web-based resources have been developed that provide a window into real advanced laboratory experiments. These resources facilitate user interactions with video from upper-level, undergraduate physics laboratory experiments and are designed...
Submissions from 2017
Holographic Plasmonic Nanotweezers for Dynamic Trapping and Manipulation, Preston R. Huft, Joshua D. Kolbow, Jonathan T. Thweatt, and Nathan C. Lindquist
We demonstrate dynamic trapping and manipulation of nanoparticles with plasmonic holograms. By tailoring the illumination pattern of an incident light beam with a computer-controlled spatial light modulator, constructive and destructive int...
Chemically imaging bacteria with super-resolution SERS on ultra-thin silver substrates, Aeli P. Olson, Kelsey B. Spies, Anna C. Browning, Paula A.G. Soneral, and Nathan C. Lindquist
Plasmonic hotspots generate a blinking Surface Enhanced Raman Spectroscopy (SERS) effect that can be processed using Stochastic Optical Reconstruction Microscopy (STORM) algorithms for super-resolved imaging. Furthermore, by imaging through...
Submissions from 2016
Split-Wedge Antennas with Sub-5 nm Gaps for Plasmonic Nanofocusing, Xiaoshu Chen, Nathan C. Lindquist, Daniel J. Klemme, Prashant Nagpal, David J. Norris, and Sang Hyun Oh
We present a novel plasmonic antenna structure, a split-wedge antenna, created by splitting an ultrasharp metallic wedge with a nanogap perpendicular to its apex. The nanogap can tightly confine gap plasmons and boost the local optical fiel...
Super-Resolution Chemical Imaging with Plasmonic Substrates, Aeli P. Olson, Christopher T. Ertsgaard, Sarah N. Elliott, and Nathan C. Lindquist
We demonstrate super-resolution chemical imaging with plasmonic nanoholes via surface-enhanced Raman spectroscopy (SERS). Due to large field enhancements, blinking behavior of SERS hot spots was observed and processed using a stochastic opt...
Super-resolution snapshot chemical imaging with plasmonic nanoholes, Aeli P. Olson and Nathan C. Lindquist
We show super-resolution chemical imaging with plasmonic nanoholes, Surface Enhanced Raman Spectroscopy and Stochastic Optical Reconstruction Microscopy. Spectral and spatial content are obtained simultaneously by imaging through filters or...
Super-resolution snapshot chemical imaging with plasmonic nanoholes, Aeli P. Olson and Nathan C. Lindquist
We show super-resolution chemical imaging with plasmonic nanoholes, Surface Enhanced Raman Spectroscopy and Stochastic Optical Reconstruction Microscopy. Spectral and spatial content are obtained simultaneously by imaging through filters or...
Direct spectral imaging of plasmonic nanohole arrays for real-time sensing, Spencer T. Seiler, Isabel S. Rich, and Nathan C. Lindquist
Plasmon-enhanced optical transmission through arrays of nano-structured holes has led to the development of a new generation of optical sensors. In this paper, to dramatically simplify the standard optical setups of these sensors, we positi...
Submissions from 2015
Super-resolution chemical imaging with dynamic placement of plasmonic hotspots, Aeli P. Olson, Christopher T. Ertsgaard, Rachel M. McKoskey, Isabel S. Rich, and Nathan C. Lindquist
We demonstrate dynamic placement of plasmonic "hotspots" for super-resolution chemical imaging via Surface Enhanced Raman Spectroscopy (SERS). A silver nanohole array surface was coated with biological samples and illuminated with a laser. ...
Polarization interferometry for real-time spectroscopic plasmonic sensing, Lauren M. Otto, Daniel A. Mohr, Timothy W. Johnson, Sang Hyun Oh, and Nathan C. Lindquist
We present quantitative, spectroscopic polarization interferometry phase measurements on plasmonic surfaces for sensing applications. By adding a liquid crystal variable wave plate in our beam path, we are able to measure phase shifts due t...
Perfect Extinction of Terahertz Waves in Monolayer Graphene over 2-nm-Wide Metallic Apertures, Hyeong Ryeol Park, Seon Namgung, Xiaoshu Chen, Nathan C. Lindquist, Vincenzo Giannini, Yan Francescato, Stefan A. Maier, and Sang Hyun Oh
High carrier mobility and tunability in graphene enable fundamental studies for plasmonics and various applications. Despite its versatility, however, single-layer graphene (SLG) suffers from poor coupling efficiency to electromagnetic wave...
Submissions from 2014
Squeezing millimeter waves through a single, nanometer-wide, centimeter-long slit, Xiaoshu Chen, Hyeong Ryeol Park, Nathan C. Lindquist, Jonah Shaver, Matthew Pelton, and Sang Hyun Oh
We demonstrate broadband non-resonant squeezing of terahertz (THz) waves through an isolated 2-nm-wide, 2-cm-long slit (aspect ratio of 107), representing a maximum intensity enhancement factor of one million. Unlike resonant nanogap struct...
Fabrication and characterization of template-stripped plasmonic substrates for high-resolution chemical imaging, Sarah Elliott, Mark Turner, Isabel Rich, and Nathan C. Lindquist
Template-stripped plasmonic nanoholes are used as high-resolution chemical imaging substrates via surface-enhanced Raman spectroscopy. Chemical patterns created with microcontact printing show these surfaces to provide large and uniform enh...
Fabrication and characterization of template-stripped plasmonic substrates for high-resolution chemical imaging, Sarah Elliott, Mark Turner, Isabel Rich, and Nathan C. Lindquist
Template-stripped plasmonic nanoholes are used as high-resolution chemical imaging substrates via surface-enhanced Raman spectroscopy. Chemical patterns created with microcontact printing show these surfaces to provide large and uniform enh...
Fabrication and Characterization of Template-Stripped Plasmonic Substrates for High-Resolution Chemical Imaging, Sarah Elliott, Mark Turner, Isabel Rich, and Nathan C. Lindquist
Template-stripped plasmonic nanoholes are used as high-resolution chemical imaging substrates via surface-enhanced Raman spectroscopy. Chemical patterns created with microcontact printing show these surfaces to provide large and uniform enh...
Fabrication and characterization of template-stripped plasmonic substrates for high-resolution chemical imaging, Sarah Elliott, Mark Turner, Isabel Rich, and Nathan C. Lindquist
Template-stripped plasmonic nanoholes are used as high-resolution chemical imaging substrates via surface-enhanced Raman spectroscopy. Chemical patterns created with microcontact printing show these surfaces to provide large and uniform enh...
Dynamic placement of plasmonic hotspots for super-resolution surface-enhanced Raman scattering, Christopher T. Ertsgaard, Rachel M. McKoskey, Isabel S. Rich, and Nathan C. Lindquist
In this paper, we demonstrate dynamic placement of locally enhanced plasmonic fields using holographic laser illumination of a silver nanohole array. To visualize these focused "hotspots", the silver surface was coated with various biologic...
Template fabricated plasmonic nanoholes on analyte-sensitive substrates for real-time vapor sensing, Nathan C. Lindquist, Mark A. Turner, and Benjamin P. Heppner
Sensing with nanostructured plasmonic devices has become an important research field due to their proven ability to be extremely sensitive, compact, multiplexed, and compatible with low-cost fabrication techniques. In this paper, we employ ...
Super-resolution snapshot chemical imaging with plasmonic nanoholes, Aeli P. Olson and Nathan C. Lindquist
We show super-resolution chemical imaging with plasmonic nanoholes, Surface Enhanced Raman Spectroscopy and Stochastic Optical Reconstruction Microscopy. Spectral and spatial content are obtained simultaneously by imaging through filters or...
Template fabricated plasmonic nanoholes on analyte-sensitive substrates for vapor sensing, Mark Turner, Benjamin Heppner, Isabel Rich, and Nathan C. Lindquist
Template-stripping is used to produce plasmonic nanoholes on chemically-patterned substrates for real-time, multiplex vapor sensing. The open-hole geometry allows simultaneous response from both sides of the chip during exposure to <10 ppm ...
Template fabricated plasmonic nanoholes on analyte-sensitive substrates for vapor sensing, Mark Turner, Benjamin Heppner, Isabel Rich, and Nathan C. Lindquist
Template-stripping is used to produce plasmonic nanoholes on chemically-patterned substrates for real-time, multiplex vapor sensing. The open-hole geometry allows simultaneous response from both sides of the chip during exposure to nitrogen...