Tuesday, 3 May 2011 - CLEO

Room 327 Room 336 Room 337 Room 338
CLEO: Science
& Innovations
CLEO: Applications
& Technology
CLEO: QELS-
Fundamental Science
CLEO: Science
& Innovations
13:45–15:30
CTuP • Novel Semiconductor
Lasers
Fumio Koyama, Tokyo Inst. of
Technology, Japan, Presider
13:45–15:30
ATuE • Sensors and Imaging
for Scientific and Security
Applications
Emma Springate, Rutherford
Appleton Lab (Artemis), UK,
Presider
13:45–15:30
QTuK • Optical Processes in
Graphene
Junichiro Kono, Rice Univ., USA,
Presider
13:45–15:30
CTuQ • Ultrafast and Broadband
Nonlinear Optics
Andrew Schober, Lockheed
Martin Coherent Technologies,
USA, Presider
CTuP1 • 13:45
High-Power BCB Encapsulated VCSELs based
on InP, Tobias Gruendl 1 , Michael Mueller 1 , Kathrin
Geiger 1 , Christian Grasse 1 , Gerhard Boehm 1 , Ralf
Meyer 1 , Markus C. Amann 1 ; 1 Walter Schottky Institut,
Technische Universitaet Muenchen, Germany.
The high temperature behavior of short cavity
InP based VCSEL devices with 5.5 µm apertures
is presented. They show record optical output
powers and SMSRs beyond 50 dB over the whole
temperature range.
ATuE1 • 13:45
An Ultra-sensitive DC and AC Accelerometer
Using Dual Superluminal Zero-Area L-shaped
Ring Lasers, Selim M. Shahriar 1 , Shih Tseng 1 ,
Joshua Yablon 1 , Honam Yum 1 ; 1 Northwestern
Univ., USA. We show that a pair of zero-area
superluminal ring lasers, each configured in an
L-shape, can perform as an ultrasensitive DC and
AC accelerometer, with sensitivity as small as 10
pico-g/root-Hz, and high dynamic range
QTuK1 • 13:45
Very Slow Carrier Cooling in Graphene Measured
by Optical/THz Pump-Probe Spectroscopy,
Jared Strait 1 , Haining Wang 1 , Shriram
Shivaraman 1 , Virgil Shields 1 , Michael Spencer 1 ,
Farhan Rana 1 ; 1 Electrical and Computer Engineering,
Cornell Univ., USA. We present results on the
relaxation dynamics of excited carriers in graphene
by optical/THz pump-probe spectroscopy. Our
data indicates that carrier cooling is very slow at
low temperatures where optical phonon emission
becomes inefficient.
CTuQ1 • 13:45 Invited
Liquid Crystals Nonlinear Optics - CW to Femtoseconds
All-Optical Signal Processing, Iam
Choon Khoo 1 ; 1 Electrical Engineering, Pennsylvania
State Univ., USA. We present an overview of recent
results obtained in pure and nano-dopant modified
liquid crystals which possess large ultrafast
nonlinear nonlinearities for all-optical processing
with lasers of wide ranging temporal and spectral
characteristics.
CTuP2 • 14:00
Tailored Intensity Distributions with Vertical-
Cavity Surface-Emitting Laser Systems, Stephan
Gronenborn 1 , Holger Moench 2 , Michael Miller 3 ,
Peter Loosen 1 ; 1 Chair of Optical Systems Technologies,
RWTH Aachen, Germany; 2 Philips Research
Laboratories, Germany; 3 Philips Technologie GmbH
U-L-M Photonics, Germany. Robust top-hat laser
beams with a large degree of freedom of the outer
shape and scalable in optical power are realised by
laser modules consisting of surface-emitting laser
diodes (VCSELs) and a simple optic.
ATuE2 • 14:00
Demonstration of a DMD-based Compressive
Sensing (CS) Spectral Imaging System, Yuehao
Wu 1 , Iftekhar Mirza 1 , Gonzalo Arce 1 , Dennis
Prather 1 ; 1 Electrical and Computer Engineering,
Univ. of Delaware, USA. We present a DMD-based
spectral imaging system, which uses a DMD to
impose CS measurements on the spatial/spectral
information of the imaging scene. The original
spatial/spectral information can be reconstructed
from the CS measurements numerically.
QTuK2 • 14:00
Diffusion and energy relaxation of hot carriers
in grapheme, Brian Ruzicka 1 , Lalani K. Werake 1 ,
Nardeep Kumar 1 , Shuai Wang 2 , Kian Ping Loh 2 ,
Hui Zhao 1 ; 1 Univ. of Kansas, USA; 2 National Univ.
of Singapore, Singapore. Diffusion and energy
relaxation of hot carriers in graphene are studied
by high-resolution pump-probe techniques. Diffusion
coefficients, energy relaxation rates and
optical phonon emissions time are determined.
Tuesday, 3 May
CTuP3 • 14:15
Drive-Current Tuning of Self-Oscillation
Frequency of External Cavity VCSEL, Clinton
J. Smith 1 , Wen-Di Li 1 , Gerard Wysocki 1 , Stephen
Y. Chou 1 ; 1 Electrical Engineering, Princeton
Univ., USA. We demonstrated the tuning of the
self-oscillation frequency of an external cavity
VCSEL using drive current. This frequency tuning
occurs for all cavity lengths constructed; however,
the degree of frequency tuning correlates with
cavity length.
ATuE3 • 14:15
An integrated, noninvasive, fiber optic sensor
for electric and magnetic field measurement
applications, Anthony Garzarella 1 , Dong Ho
Wu 1 ; 1 Naval Research Lab, USA. We describe
a ruggedized, nonmetallic, fiber optic sensor
utilizing nonlinear crystals for measurements of
electric and magnetic fields. Extensive field test
results in a variety of RF sources (from dc to 20
GHz) are reported.
QTuK3 • 14:15
Observation of the relativistic response of an
electron-hole plasma in graphene on femtosecond
timescales, Keshav M. Dani 1 , Jinho Lee 1 ,
Rishi Sharma 2 , Aditya Mohite 1 , Charu C. Galande 3 ,
Pulickel M. Ajayan 3 , Andrew M. Dattelbaum 1 , Han
Htoon 1 , Antoinette J. Taylor 1 , Rohit P. Prasankumar
1 ; 1 Center for Integrated Nanotechnologies, Los
Alamos National Lab, USA; 2 Theoretical Division,
Los Alamos National Lab, USA; 3 Department of
Mechanical Engineering and Materials Science,
Rice Univ., USA. Visible pump-probe spectroscopy
isolates the femtosecond Drude response of a photogenerated
electron-hole plasma in monolayer
graphene. The observed nonlinear scaling versus
carrier density reveals the relativistic nature of the
electron-hole plasma.
CTuQ2 • 14:15
Supercontinuum Generation near 2 μm in Periodically
Poled Lithium Niobate Waveguides,
Christopher Phillips 1 , Carsten Langrock 1 , Martin
M. Fejer 1 , Jie Jiang 2 , Ingmar Hartl 2 , Martin E.
Fermann 2 ; 1 Stanford Univ., USA; 2 IMRA America,
Inc., USA. We demonstrate spectral broadening
and self-frequency-shift around 2-μm wavelengths
in periodically poled LiNbO 3 waveguides, in agreement
with simulations. We show numerically that
octave-spanning spectra can be achieved with 6 nJ
of pulse energy.
CTuP4 • 14:30
Long-wavelength (λ≈ 14 µm) Quantum Cascade
Lasers with Low Threshold and High Characteristic
Temperature (~ 300 K), Xue Huang 1 ,
William O. Charles 1 , Claire F. Gmachl 1 ; 1 Princeton
Univ., USA. We demonstrate a high-performance
Quantum Cascade laser at ~ 14 µm wavelength. It
shows a low threshold current density of 2.1 kA/
cm 2 at 300 K and high characteristic temperature
of 309 K around room temperature.
ATuE4 • 14:30
Explosive Sensing using Multiple-Excitation-
Wavelength Resonance-Raman Scattering,
Balakishore Yellampelle 1 , Mikhail Sluch 1 , Sanford
Asher 2 , Brian Lemoff 1 ; 1 Advanced Technology
Group, WVHTC Foundation, USA; 2 Department
of Chemistry, Univ. of Pittsburgh, USA. We have
developed a new technique that uses Raman
spectra obtained from multiple DUV excitation
wavelengths for explosive detection. The strong
dependence on excitation wavelength of the Raman
signal provides a unique signature improving
specificity.
QTuK4 • 14:30
Interlayer Electronic Coupling Observed by
Polarization Dependent Coherently Controlled
Photocurrent Generation in Multilayer Epitaxial
Graphene, Dong Sun 1 , Julien Rioux 2 , J. E. Sipe 2 ,
Claire Berger 3 , Walt De Heer 3 , Theodore Norris 1 ;
1
Center for Ultrafast Optical Science, Univ. of
Michigan, USA; 2 Department of Physics and Inst.
for Optical Science, Univ. of Toronto, Canada;
3
School of Physics, Georgia Inst. of Technology,
USA. We measured the third order nonlinear tensor
in epitaxial graphene by studying coherently
controlled photocurrent direction as function
of pump light polarization. The measured tensor
element indicates the presence of interlayer
electronic coupling.
CTuQ3 • 14:30
Wideband Supercontinuum Generation in Tapered
Tellurite Microstructured Fibers, Yasutake
Ohishi 1 , Guanshi Qin 1,2 , Xin Yan 1 , Meisong Liao 1 ,
Atsushi Mori 3 , Takenobu Suzuki 1 ; 1 Research Center
for Advanced Photon Technology, Toyota Technological
Inst., Japan; 2 Jilin Univ., China; 3 NTT, Japan.
Enhanced soliton trapping of dispersive waves in
a tapered tellurite microstructured fiber pumped
by a 1557 nm femtosecond laser is demonstrated.
The short wavelength edge of supercontinuum
light is extended from 960 to 600 nm.
106 CLEO: 2011 • 1–6 May 2011