Team

Director

Professor of Chemistry, University of California, Irvine

Ultrafast nonlinear spectroscopy

(949) 824-6851 | aapkaria@uci.edu

Senior Personnel

Associate Professor of Chemistry, University of California, Irvine

Ultrafast 2-D IR spectroscopy

(949) 824-1263 | nhge@uci.edu | Group page

Donald Bren Professor of Chemistry and Physics, University of California, Irvine

Spectroscopy with submolecular resolution using inelastic STM

(949) 824-5234 | wilsonho@uci.edu | Group page

Assistant Professor of Chemistry, Penn State University

Theory of Molecular Plasmonics and Computational Spectroscopy

(814) 867-1787 | jensen@chem.psu.edu | Group page

Associate Professor, University of California, Irvine
(949) 824-5996 | lawm@uci.edu | Group page

R. K. Mellon Professor, University of PIttsburgh

Condensed Matter Physics

(412) 624-3599 | petek@pitt.edu | Group page

Associate Professor of Chemistry, University of California, Irvine

Non-linear optical (CARS) microscopy

(949) 824-9942 | epotma@uci.edu | Group page

Professor of Chemistry, Northwestern University

Energy Science; Theory & Computation

(847) 491-5657 | schatz@chem.northwestern.edu | Group page

Associate Professor of Chemistry, University of Utah

Interfacial & Bioanalytical Chemistry (IBAC) photochemical properties

(801) 585-1434 | shumaker-parry@chem.utah.edu | Group page

Charles E. and Emma H. Morrison Professor of Chemistry, Northwestern University

Surface-Enhanced Raman Spectroscopy

(847) 491-3516 | vanduyne@northwestern.edu | Group page

Professor of Electrical Engineering & Computer Science, University of California, Irvine
(949) 824-0378 | hkwick@uci.edu

Physics and Astronomy, University of California, Irvine

Condensed Matter Physics

(949) 824-7640 | wur@uci.edu | Group page

Collaborators

Associate Professor of Physics & Astronomy, University of California, Irvine
(949) 824-9961 | collinsp@uci.edu | Group page

Professor of Chemistry, University of California, Irvine
(949) 824-1746 | rcorn@uci.edu | Group page

Researcher, University of Jyväskylä
+358 40 805 4356 | karoliina.honkala@jyu.fi

Professor of Chemistry, University of California, Irvine
(949) 824-8572 | rmpenner@uci.edu | Group page

Professor of Chemistry, The University of Liverpool
+44-151-794 3518 | mpersson@liv.ac.uk

Associate Professor of Chemistry, University of California, Irvine
(949) 824-5566 | gweiss@uci.edu | Group page

Director, Technology and Applications Center
(949) 863-3144 | ruben.zadoyan@newport.com

Professional Staff

Erika Metz
Administrative Specialist
949-824-4560 | emetz@uci.edu

André Schirotzek
Managing Director
949-824-2646 | schiro@uci.edu

Lauren Shea
Director, Education and Outreach
949-824-9473 | lshea@uci.edu

Project Scientists & Specialists

Zhaoqiang Bai
Assistant Specialist, Wu group

Photocatalysis, Time-Dependent Density Functional Theory

zhaoqiang.bai@uci.edu | Group page

Joonhee Lee
Project Scientist, UC Irvine, Apkarian group

Time-resolved scannning tunneling microscopy, Single molecule Raman Spectroscopy, Ultrafast electron dynamics in plasmonic materials

joonhee@uci.edu

Xuejun Liu
UC Irvine, Potma group
Nonlinear microscopy with applications in material science and biomedicine, High-resolution spectroscopy. 
Nonlinear plasmonics.
xuejunl@uci.edu | Group page

Hiroaki Maekawa
Assistant Specialist, UC Irvine, Ge group

Ultrafast nonlinear spectroscopy, multidimensional infrared spectroscopy and nonlinear microscopy.

hmaekawa@uci.edu | Group page

Venkata Ananth Tamma
Associate Specialist, UC Irvine, Wickramasinghe group

Studying the use of optical forces to investigate light-matter interaction at the single molecule level. Development of novel Tip Enhanced Raman (TERS) techniques such as stimulated-TERS and their application towards single molecule spectroscopy. Research areas of interest: Near-field optics, plasmonics, scanning probe microscopy and spectroscopy.

ananth.tamma@uci.edu | Group page

Dingwang Yuan
Visiting Associate Researcher, UC Irvine, Wu group
Study chemical properties of small molecules on metal surfaces and nanocatalysts using first-principles calculations.
dingwany@uci.edu | Group page

Aram Zeytunyan
UC Irvine, Apkarian group

Four wave mixing spectroscopy with a single molecule sensitivity (background-free time resolved CARS with wavelength-tunable ultrashort laser pulses);
high-order-harmonic generation from metal nanotips.

azeytuny@uci.edu

Postdoctoral Scholars

Lauren Buchanan
Northwestern University, Van Duyne group

My research uses surface-enhanced ultrafast nonlinear spectroscopies to study the effect of plasmonic enhancement on ultrafast dynamics in nanomaterials relevant to photovoltaics and photocatalysis. The goal is to push the sensitivity of these measurements toward the single molecule regime.

lauren.buchanan@northwestern.edu | Group page

Xing Chen
Penn State University, Jensen group
xzc4@psu.edu | Group page

Maciej Dabrowski
University of PIttsburgh, Petek group

The dynamics of surface plasmons with sub-wavelength spatial resolution and sub-femtosecond temporal precision by using PEEM and LEEM.

mdabrows@pitt.edu | Group page

Eero Hulkko
UC Irvine, Apkarian group

Ultrafast spectroscopy and light-matter interactions in plasmonic nanoparticles. Focusing on single molecule SERS/TERS in different nanoparticle geometries and development of ambient light induced fs-STM microscopy.

ehulkko@uci.edu

Nicolas Large
Northwestern University, Schatz group

The goal of my research is to tackle challenging problems in the general area of condensed matter theory, using electromagnetic simulation tools and developing theoretical models for the study of the optical response of metallic nanostructures, plasmonic, excitonic, and hybrid systems.

Nicolas.Large@northwestern.edu | Group page

Sudipta Mukherjee
UC Irvine, Ge group
Ultrafast Nonlinear Spectroscopy, Nonlinear microscopy, Surface Enhanced Nonlinear spectroscopy
sudiptam@uci.edu | Group page

Bogdan Negru
Northwestern University, Van Duyne Group
My goal in the Van Duyne group is to use ultrafast spectroscopy to investigate vibrational dynamics of chemical 
systems deposited on nanoparticle substrates that provide surface enhancement effects.
bnegru@gmail.com | Group page

Qiang Zou
University of PIttsburgh, Petek group
Group page

Graduate Students

Brian Albee
University of California, Irvine, Potma group
balbee@uci.edu | Group page

Mayukh Banik
UC Irvine, Apkarian group
banikm@uci.edu

Jordan Brocious
UC Irvine, Potma group

I study the ultrafast nonlinear optical processes of nano-structured materials and work to extend this to the single molecule regime through the measurement of light-induced changes in the attractive force between a cantilevered atomic force microscope tip and the polarizable medium.

jbrociou@uci.edu | Group page

Weicai Cao
UC Irvine, Ho group

Femtosecond Light-Molecule Interaction with a Tunable Wavelength Femtosecond Laser Coupled STM

wcao@uci.edu | Group page

Dhabih V. Chulhai
Penn State University, Jensen group

Theory and method development as it relates to light/matter interactions. Primarily concerned with the response of molecules coupled to plasmonic nanoparticles.

dvc121@psu.edu | Group page

Cindy Cooper
University of Utah, Shumaker-Parry group

My research is focused on the characterization and application of gold and silver plasmonic nanocrescents. The localized surface plasmon resonances (LSPR) of these structures have been shown to be polarization dependent, leading to selective excitation of unique resonance modes, and maintain nanoscale resonance behavior into microscale dimensions, resulting in resonance frequencies over a visible to infrared frequency range. We are working with the Ge and Potma groups to integrate nanocrescent substrates into surface enhanced sum frequency vibrational spectroscopy.

ctaylor@chem.utah.edu | Group page

Kevin T. Crampton
UC Irvine, Apkarian group

My research involves investigating the coupling of light to surface plasmon polaritons via tailored, transient optical gratings. This coupling scheme is then utilized to remotely launch surface plasmons at nanojunctions to drive and monitor space-time resolved chemistry.

kcrampto@uci.edu

Gregory Czap
UC Irvine, Ho group

My current research efforts are focused on using a low-temperature ultra-high vacuum Scanning Tunneling Microscope (STM) coupled to a femtosecond laser and CCD camera to explore the electronic states, charge transfer, light emission and absorption, plasmon resonance and catalysis enhancement of single molecules and nanostructures with sub-Angstrom spatial resolution. Presently we are investigating the spatial dependence of plasmon-enhanced catalysis in the vicinity of gold nanoparticles.

gczap@uci.edu | Group page

Yanan Dai
University of PIttsburgh, Petek group

Ultrafast photoemission electron microscopy of plasmonic nanostructures

yad17@pitt.edu | Group page

Natalie Gruenke
Northwestern University, Van Duyne group

My research involves exploring different plasmonic substrate systems for use in the new technique of surface-enhanced femtosecond stimulated Raman spectroscopy.  Our aim to to watch chemical reactions on the femtosecond timescale of nuclear motion by combining the plasmonic enhancements provided by surface- and tip-enhanced Raman spectroscopy with the time resolution of ultrafast spectroscopies.

nlg@u.northwestern.edu | Group page

Fei Huang
UC Irvine, Wickramasinghe group

I am doing force detection of sample optical response using AFM.

feih@uci.edu | Group page

Junghoon Jahng
UC Irvine, Potma group

Studying optically induced force (Image force, Raman force, Plasmonic force, etc) microscopy and spectroscopy by combining atomic force microscope with optical microscope. Key words: optical gradient forces (plasmonic force, image force, Raman force), near-field optics, nonlinear optics, AFM

jjahng@uci.edu | Group page

Jordan M. Klingsporn
Northwestern University, Van Duyne Group

I am currently utilizing ultrahigh vacuum tip-enhanced Raman spectroscopy (UHV-TERS) to solve challenging chemical problems that require pushing the limits of space and time. UHV-TERS allows pristine samples to be prepared and studied with Ångstrom-scale topographical resolution, nanometer spectroscopic resolution, sensitivity down to a single-molecule, and currently I am working towards incorporating picosecond temporal resolution.

jordanklingsporn2014@u.northwestern.edu | Group page

Cady Lancaster
University of Utah, Shumaker-Parry group

I am investigating the development of a gold nanocrescent/alumina substrate for surface enhanced spectroscopy investigations of catalytically-active triphenylphosphine-stabilized gold nanoclusters.

lancaster.cdy@utah.edu | Group page

Shaowei Li
University of California, Irvine, Ho group
shaoweil@uci.edu | Group page

Julia Majors
UC Irvine, Apkarian group

I study plasmon dynamics on STM tips via grating coupling of femtosecond laser pulses in an effort to produce coherent field emission of electrons at the tip apex for future applications in time resolution of tunneling measurements at the single molecule level.

jmajors@uci.edu

Michael McAnally
Northwestern University, Van Duyne Group
michaelmcanally2011@u.northwestern.edu | Group page

Vineet Nair
UC Irvine, Law group
vnair@uci.edu | Group page

Calvin Patel
UC Irvine, Ho group

Research and development of a Radio Frequency Scanning Tunneling Microscope(RF-STM) with the capability to detect photon induced tunneling current for the purposes of combining femtosecond temporal resolution and sub-angstrom spatial resolution.

cjpatel@uci.edu | Group page

Eric Pozzi
Northwestern University, Van Duyne Group

My research concerns incorporating femtosecond temporal resolution with nanoscale surface characterization. Tip-enhanced Raman spectroscopy (TERS) is a technique through which the chemical properties of surface-bound molecules can be probed spectroscopically with spatial resolution on the order of single nanometers. While TERS is typically poor in temporal resolution, we have made advances toward the integration of ultrafast spectroscopic techniques, which will allow us to spatially resolve ultrafast surface dynamics relevant to many technologies.

ericpozzi2011@u.northwestern.edu | Group page

Lindsey Pruden
University of Utah, Shumaker-Parry group
lindseypruden@chem.utah.edu | Group page

Art Quast
University of Utah, Shumaker-Parry group
(801) 580-2634 | quast@chem.utah.edu | Group page

Laura Ríos
UC Irvine, Apkarian group

I propose to explore the rectifying abilities of DBDT for implementation in solar energy technology. Major characterization methods include STM and AFM experiments.

lrios2@uci.edu

Kate Rodriguez
UC Irvine, Apkarian group
kater@uci.edu

Emily Sprague
Northwestern University, Van Duyne Group

My research currently involves photostability studies of four-wave mixing substrates for surface-enhanced stimulated raman spectroscopy (SE-FSRS) and surface-enhaced coherent raman scattering (SE-CARS).  I am also conducting theoretical calculations of non-equilibrium electron dynamics in order to gain insight into rapid thermalization processes occurring within experimental ultrafast systems.

emilysprague2017@u.northwestern.edu | Group page

Mark Swartz
University of Utah, Shumaker-Parry group
mmswartz@mac.com | Group page

Nicholas Tallarida
UC Irvine, Apkarian group

I use a scanning tunneling microscope to study single molecule electron dynamics and Tip Enhanced Raman Spectroscopy. I am also investigating an intrinsically conductive metalorganic polymer for its use as molecular wires.

ntallari@uci.edu

Shijing Tan
University of PIttsburgh, Petek group
Group page

Jason Tolentino
UC Irvine, Law group
jasonct@uci.edu | Group page

Faezeh Tork-Ladani
UC Irvine, Potma group
I study near field enhancement and control in plasmonic nanostructures for spectroscopy and imaging applications. 
Currently my research focuses on the asymmetry of plasmonic nano-dumbbells and excitation of multipolar
fields in single molecule SERS experiments.
ftorklad@uci.edu | Group page

Steven Yampolsky
UC Irvine, Apkarian group

Time Resolved Four Wave Mixing Spectroscopy (CARS, Transient Grating) with Visible Femtosecond Pulses.  Current systems of interest include: Bulk Magnesium Porphyrin, Silicon Naphthalocyanine in solution, Plasmon Propagation along thin film gold using four wave mixing to create an optically controlled grating to couple a third beam to Surface Plasmon Polaritons.

syampols@uci.edu

Arthur Yu
UC Irvine, Ho group

Research specializing in femtosecond laser coupled STM, STM induced photon emission, single molecule spectroscopy / microscopy.

ayu1@uci.edu | Group page

Undergraduate Students

Kan Fu
UC Irvine, master student, Law group

STM studies of coupling in QD oligomers, Inductive effect of organic ligands for quantum dots.

kanf@uci.edu | Group page

External Advisory Board

Mostafa El-Sayed
Regents' Professor and Julius Brown Chair, Georgia Tech

Supratik Guha
Director, Physical Sciences, IBM Research

Robert J. Phillipy
President CEO, Newport Corporation, Irvine

Paul Weiss
Professor of Chemistry and Biochemistry, UCLA