Tuesday, 3 May 2011 - CLEO

Ballroom Foyer
JOINT
18:30–20:00
JTuI • Nanophotonics and Integration Joint Poster Session
Tuesday, 3 May
CLEO: Science & Innovations 7:
Micro- and Nano-Photonic Devices
JTuI1
Directional Control of Lateral Leakage in
Thin-ridge Silicon-on-Insulator Waveguides,
Naser Dalvand 1 , Thach Nguyen 1 , Ravi Tummidi 2 ,
Thomas Koch 2 , Arnan Mitchell 1 ; 1 School of Electrical
and Computer Engineering, RMIT Univ., Australia;
2
Center for Optical Technologies, Lehigh Univ., USA.
We present a method to control the direction of
lateral leakage of Silicon-On-Insulator waveguide
which is verified by full vector super-mode
analysis. The results suggest new opportunities for
device topologies inspired by antennas.
JTuI2
Novel High Efficiency Vertical Optical Coupler
Using Subwavelength High Contrast Grating, Li
Zhu 1 , Vadim Karagodsky 1 , Weijian Yang 1 , Connie
J. Chang-Hasnain 1 ; 1 Electrical Engineering and
Computer Science, Univ. of California, Berkeley,
USA. A novel vertical coupler using subwavelength
high contrast grating is presented. Via
such coupler, surface-normal incidence wave
can be coupled into in-plane silicon-on-insulator
waveguide with highest efficiency of 84% over
broad wavelength range.
JTuI3
Reflection-type Slow Light Optical Switches
Using Current Injection, Ayumi Fuchida 1 , Akihiro
Matsutani 1 , Fumio Koyama 1 ; 1 Tokyo Inst. of Technology,
Japan. A slow-light reflection-type switch
with crossing angle of 30-degree is demonstrated.
Switching operation is realized using current injection.
We obtained an extinction ration of over
15dB due to enhanced equivalent index change
by slowing light.
JTuI4
On the Mechanism of Efficient Coupling into
Slow Light Photonic Crystal Waveguides, Amir
Hosseini 1 , Xiaochuan Xu 1 , David Kwong 1 , Harish
Subbaraman 2 , Ray T. Chen 1 ; 1 ECE, Univ. of Texas
at Austin, USA; 2 Omega Optics, Inc., USA. We
investigate effects of evanescent modes on light
coupling into low light mode of photonic crystal
waveguides. Numerical and experimental results
show that group index tapering does not have a
dominant role for efficient coupling.
JTuI5
Electro-Optical Modulator Based on the p
-n -n Transistor Structure Integrated on SOI
Substrate, Ricky W. Chuang 1,2 , Mao-Teng Hsu 1 ,
Shen-Horng Chou 2 ; 1 Electrical Engineering,
National Cheng Kung Univ., Taiwan; 2 National
Nano Device Laboratories, Taiwan. We report
a p+-n+-n+ transistor-based electro-optical
modulator fabricated on silicon-on-insulator
(SOI) substrate. With 100% modulation depth
achieved, the rise and fall times were respectively
measured to be 60 and 56 ns. The 3 dB bandwidth
in the excess of 10.5 MHz was determined from
the corresponding device.
JTuI6
Carrier Depletion Based Linear Silicon Modulator,
Stanley M. G. Lo 1 , Chao Li 1 , Hon K. Tsang 1 ;
1
Department of Electronic Engineering, The Chinese
Univ. of Hong Kong, Hong Kong. We show that the
linearity of a silicon electro-optic modulator can
be improved by optimizing the embedded diode
structure. Optimized designs of silicon modulators
can give 5.9 dB improvement in SFDR over
conventional LiNbO 3 modulators.
JTuI7
Novel Coupling Modulator Design Using Ring-
Resonator-Based Light Drop Structure, Yunchu
Li 1 , Lawrence Stewart 1 , P. Daniel Dapkus 1 ; 1 Electrical
Engineering, Univ. of Southern California, USA.
Coupling modulation using microring-based
light drop structure which removes the pattern
dependence problem is proposed. Extinction
ratio improvement from 3 dB to >30 dB in 40
Gb/s NRZ signal is obtained with 25X smaller
drive voltage.
JTuI8
Surface Tension Reshaped Lithium Niobate
Whispering Gallery Mode Micro-resonators,
Charlie Y. J. Ying 1 , Senthil Murugan 1 , Gilberto
Brambilla 1 , Collin Sones 1 , Elisabeth Soergel 2 ,
James S. Wilkinson 1 , Robert W. Eason 1 , Michalis
N. Zervas 1 , Sakellaris Mailis 1 ; 1 Optoelectronics
Research Centre, Univ. of Southampton, UK; 2 Inst. of
Physics, Univ. of Bonn, Germany. Lithium niobate
micro-resonators have been fabricated by surface
tension reshaping of micro-structured crystals
at temperatures close to the melting point. We
present preliminary results on the optical characterization
of these structures.
JTuI9
Ultra-high Q long-path As 2 S 3 ring resonator on
LiNbO 3 , Yifeng Zhou 1 ; 1 Texas A&M Univ., USA.
A vertically integrated As 2 S 3 ring resonator sidecoupled
to Ti:LiNbO 3 waveguide was designed and
fabricated. We have demonstrated an ultra-high Q
value of 3.5x10 5 and low propagation loss of 1.2 dB/
cm over a 1.7 cm race-track ring resonator.
JTuI10
A Vertical SG-DBR Based Tunable Hybrid
Silicon Evanescent Laser, Venkat Veerasubramanian
1 , Guillaume Beaudin 2 , Alexandre Giguere 2 ,
Boris LeDrogoff 3 , Vincent Aimez 2 , Andrew G.
Kirk 1 ; 1 McGill Univ., Canada; 2 Univ. of Sherbrooke,
Canada; 3 Institut national de la recherche scientifique,
Canada. We propose a tunable hybrid silicon
evanescent laser with vertical sidewalled sampled
grating distributed Bragg reflectors (SG-DBR) on
SOI. The device utilizes a Vernier comb and the
electrooptic effect in silicon for tuning within a
30 nm range.
JTuI11
Statistical Properties of Scattering Loss and
Mode Splitting in Microdisk Resonators, Qing
Li 1 , Ali Asghar Eftekhar 1 , Ali Adibi 1 ; 1 Gatech, USA.
We report an experimental observation that in
high-Q silicon microdisk resonators, the intrinsic
Q and mode splitting can vary significantly
over the azimuthal orders. A theoretical roughness
model qualitatively explains the observed
results.
JTuI12
Experimental observation of Fano resonance in
a single whispering-gallery microresonator, Bei-
Bei Li 1 , Yong-Chun Liu 1 , Xue-Feng Jiang 1 , Qihuang
Gong 1 , Yun-Feng Xiao 1 ; 1 Peking Univ., China. We
observe Fano resonance in a single microresonator,
in which two modes are excited simultaneously
through a fiber taper. Our analysis reveals that
the Fano resonance originates from an indirectcoupling
of two originally orthogonal modes.
JTuI13
A Self-luminescent Horizontal Slot Microdisk
Resonator for Biosensing Applications,
Shinyoung Lee 1 , Gun Yong Sung 2 , Jung H. Shin 1,3 ;
1
Department of Physics, KAIST, Republic of Korea;
2
Biosensor Research Team, ETRI, Republic of Korea;
3
Graduate School of Nanoscience and Technology
(WCU), KAIST, Republic of Korea. We design
and fabricate a self-luminescent horizontal slot
microdisk resonator using visible light emission
of Si-ncs for biosensing. The surface sensitivity
of the sensor is calculated as 2.46 nm/(nm*RIU)
using FDTD method.
JTuI14
Hollow-Bottle Optical Microresonators, Michalis
N. Zervas 1 , Senthil Murugan 1 , Marco Petrovich 1 ,
James S. Wilkinson 1 ; 1 Optoelectronics Research
Centre, Univ. of Southampton, UK. Hollow-bottle
resonators are fabricated by a pressure-compensated,
“soften-and-compress” method. Q-factor
and excitation efficiency show high tolerance to
angular misalignments, and localized losses on the
resonator result in spectral clean-up.
JTuI15
Resonant in-situ photoluminescence of Si-QDs
buried in SiO x /SiN x distributed Bragg reflector,
Chung-Lun Wu 1 , Yung-Hsiang Lin 1 , Gong-Ru Lin 1 ;
1
National Taiwan Univ., Taiwan. A 20-pair SiO x /
SiN x :Si-QDs distributed Bragg reflector with insitu
Si-QDs contributed photoluminescence at
667nm is demonstrated to shrink the Si-QDs emission
linewidth from 140 to 19 nm and enhance its
intensity by 37.4 times.
JTuI16
Direct Estimation of Purcell Factor from
Scatterer-Induced Mode Splitting Spectra of an
Optical Microcavity, Sahin K. Ozdemir 1 , Jiangang
Zhu 1 , Lina He 1 , Lan Yang 1 ; 1 Electrical and Systems
Engineering, Washington Univ. in St. Louis, USA.
Scattering process in a microcavity coupled to subwavelength
scatterers is investigated using nanoparticles,
ions and virions. Direct and single-shot
estimation of Purcell factor is demonstrated using
the scatterer- induced mode-splitting spectra.
JTuI17
CdSe/ZnS quantum dot embedded hollow
toroidal microcavities and their modal properties,
Kyungwook Hwang 1 , Hyungrae Cha 2 , Doosik
Moon 3 , Jinkyu Lee 3 , Heonsu Jeon 1,2 ; 1 Physics and
Astronomy & Inter Univ. Semiconductor Rersearch
Center, Seoul National Univ., Republic of Korea;
2
Biophysics and Chemical Biology, Seoul National
Univ., Republic of Korea; 3 Chemistry, Seoul National
Univ., Republic of Korea. We fabricated a lightemitting
hollow toroidal micro-cavity by applying
low temperature heat treatment to a polymer thin
film micro-disk containing CdSe/ZnS quantum
dots and investigated their modal properties from
quantum dot emission spectra.
JTuI18
A Study on Cross-talk in Nanometric-gap Quantum
Dot Photodetectors, Ludan Huang 1,2 , Lih Y.
Lin 2,1 ; 1 Department of Physics, Univ. of Washington,
USA; 2 Department of Electrical Engineering, Univ.
of Washington, USA. We propose a scheme to
experimentally investigate cross-talk in closely
positioned QD photodetectors. A cross-talk of
~25.8% at separation of 212 nm is demonstrated
in pre-optimized devices.
JTuI19
Ultrafast GaAs Nano-Whisker Photodetector
for THz-Frequency Applications, Jie Zhang 1 ,
Martin Mikulics 2 , John Serafini 1 , Mufei Gong 1 , Roman
Adam 3 , Roman Sobolewski 1 ; 1 Electrical and
computer engineering, LLE, U. of Rochester, USA;
2
Inst. of Bio- and Nanosystems, Research Centre
Jülich, Germany; 3 Inst. of Solid State Research,
Research Centre Jülich, Germany. We designed and
fabricated novel, freestanding GaAs nanowhisker
detectors and demonstrated their femtosecond
photoresponse. Electrical transients were recorded
and frequency-domain analysis indicated the
intrinsic bandwidth was above 2 THz.
JTuI20
Precise micro-fabrication of structures to enhance
photon collection from diamond color
centers, John Hadden 1 , Luca Marseglia 2 , Antony
Stanley-Clarke 1 , Jake Kennard 1 , Joanne Harrison 2 ,
Ying-Lung Ho 2 , Brian Patton 1 , John G. Rarity 2 ,
Jeremy O’Brien 1,2 ; 1 Department of Physics, Univ. of
Bristol, UK; 2 Department of Electrical & Electronic
Engineering, Univ. of Bristol, UK. Diamond color
centers show promise in quantum photonics applications.
However practical implementation is
limited by low photon collection efficiency. We
report precise fabrication of structures which
substantially increase collection efficiency.
JTuI21
Low-Loss Slow Light in High Contrast Grating
Hollow-Core Waveguides, Tianbo Sun 1 , Forrest
Sedgwick 1 , Weijian Yang 1 , Connie J. Chang-
Hasnain 1 , Vadim Karagodsky 1 ; 1 EECS, Univ. of
California at Berkeley, USA. A chip-scale hollowcore
waveguide using high-contrast grating yields
slow light with a group velocity