Zheng Wang

Zheng Wang
SITRI · BTIT

Doctor of Philosophy

About

34
Publications
9,126
Reads
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401
Citations
Introduction
Dr. Zheng Wang was born in Hebei, P.R. China. He received his B.S. degree from Tsinghua University in 2012 and his Ph.D. degree from The University of Texas at Austin in 2017. His research focuses on the design, fabrication, and characterization of nanophotonic devices and photonic integrated circuits(PICs) for their applications in sensing, on-chip optical interconnects, and high-performance computing. He has published over 40 papers in refereed journals and conferences.
Additional affiliations
June 2018 - present
Imec
Position
  • Project Manager
October 2013 - December 2017
University of Texas at Austin
Position
  • Research Assistant
Description
  • Microelectronics Research Center
September 2012 - June 2013
University of Texas at Austin
Position
  • Research Assistant
Education
August 2012 - December 2017
August 2008 - July 2012
Tsinghua University
Field of study
  • Mathematics and physics

Publications

Publications (34)
Article
Full-text available
To detect biochemicals with ultra-high sensitivity, efficiency, reproducibility and specificity has been the Holy Grail in the development of nanosensors. In this work, we report an innovative type of photonic-plasmonic hybrid Raman nanosensors integrated with electrokinetic manipulation by rational design, which offers dual mechanisms that enhance...
Article
Full-text available
Subwavelength grating (SWG) waveguide is an intriguing alternative to conventional optical waveguides due to the extra degree of freedom it offers in tuning a few important waveguide properties, such as dispersion and refractive index. Devices based on SWG waveguides have demonstrated impressive performances compared to conventional waveguides. How...
Article
Full-text available
Subwavelength grating waveguide-based micro-ring resonators (SWGMRs) are a promising platform for research in light-matter interaction. However, it is extremely difficult to achieve small radius SWGMR devices (e.g., 5 μm) with satisfying quality factors (e.g., ∼10,000). One major issue is the large bend loss of small radius SWGMRs. In this work, we...
Article
Full-text available
Traditional silicon waveguides are defined by waveguide trenches on either side of the high-index silicon core that leads to fluid leakage orifices for over-layed microfluidic channels. Closing the orifices needs additional fabrication steps which may include oxide deposition and planarization. We experimentally demonstrated a new type of microflui...
Conference Paper
As VLSI technology scales to deep sub-micron, optical interconnect becomes an attractive alternative for on-chip communication. The traditional optical routing works mainly optimize the path loss, and few works explicitly exploit the optical-electrical co-design of on-chip interconnects. To overcome these limitations, we present an efficient framew...
Article
Full-text available
The past several decades have witnessed the gradual transition from electrical to optical interconnects, ranging from long-haul telecommunication to chip-to-chip interconnects. As one type of key component in integrated optical interconnect and high-performance computing, optical modulators have been well developed these past few years, including u...
Article
Full-text available
Due to the projected saturation of Moore's law, as well as the drastically increasing trend of bandwidth with lower power consumption, silicon photonics has emerged as one of the most promising alternatives that has attracted a lasting interest due to the accessibility and maturity of ultra-compact passive and active integrated photonic components....
Conference Paper
Full-text available
We experimentally demonstrate a two-bit thermal-optic ripple-carry full adder based on microdisk resonators in silicon photonics with the advantages of large bandwidth, low power consumption, and high scalability, paving the way to future optical computing.
Article
Full-text available
All-optical switches have been considered as a promising solution to overcome the fundamental speed limit of the current electronic switches. However, the lack of a suitable third-order nonlinear material greatly hinders the development of this technology. Here we report the observation of ultrahigh third-order nonlinearity about 0.45 cm²/GW in gra...
Conference Paper
Full-text available
We propose a ripple-carry electro-optic full adder using microring resonators, taking advantage of unique properties of light on chip. This proposed design with larger bandwidth and lower power consumption paves the way to future optical computing.
Conference Paper
Full-text available
We report an optical switch based architecture for realizing optical computing. Numerical simulation has been performed to validate the architecture by adopting CMOS compatible PN depletion micro-ring resonator as the approach for optical switching.
Conference Paper
Full-text available
Subwavelength grating (SWG) waveguide is an intriguing alternative to conventional optical waveguides due to its freedom to tune a few important waveguide properties such as dispersion and refractive index. Devices based on SWG waveguide have demonstrated impressive performances compared to those of conventional waveguides. However, the large loss...
Conference Paper
In recent decades, silicon photonics has attracted intensive research interest in optical communications due to its advantageous compact dimensions and high-volume manufacturability. Particularly, micro-ring resonators on silicon-oninsulator (SOI) platform have been widely exploited as a basic building block for a vast range of applications such as...
Conference Paper
Full-text available
We report the design and experimental demonstration of high quality factor, trapezoidal shape subwavelength grating waveguide micro-ring resonators (SWGMRs). A 5 μm radius SWGMR with a quality factor as high as 11,500 has been demonstrated for the first time.
Conference Paper
Full-text available
We report the design, simulation and experimental demonstration of low loss subwavelength grating waveguide (SWG) bends. With trapezoidal shape silicon pillars, the average insertion loss of a 5μm SWG waveguide bend is reduced drastically from 5.43dB to 1.10dB per 90°bend for quasi-TE polarization.
Conference Paper
Full-text available
We experimentally demonstrate that resonances in a system of coupled photonic crystal microcavities can have higher quality factor (Q~15,000) than an uncoupled cavity (Q~4,000), which is critical for sensing applications. We study theoretically the origins of higher Q coupled photonic molecules.
Conference Paper
Full-text available
We experimentally demonstrate 2-D photonic crystal slab-coupled plasmonic nanocapsules for surface enhanced Raman spectroscopy (SERS). A strong Raman signal enhancement can be unambiguously detected even with a low concentration 10 nM dye molecules.
Article
Full-text available
A method for the dense integration of high sensitivity photonic crystal (PC) waveguide based biosensors is proposed and experimentally demonstrated on a silicon platform. By connecting an additional PC waveguide filter to a PC microcavity sensor in series, a transmission passband is created, containing the resonances of the PC microcavity for sensi...
Conference Paper
Full-text available
Integrating photonic waveguide sensors with microfluidics is promising in achieving high-sensitivity and cost-effective biological and chemical sensing applications. One challenge in the integration is that an air gap would exist between the microfluidic channel and the photonic waveguide when the micro-channel and the waveguide intersect. The air...
Article
Full-text available
We designed and fabricated guided-mode resonance (GMR) gratings on indium-tin-oxide (ITO) thin film to generate a significantly enhanced local electric field for surface-enhanced Raman scattering (SERS) spectroscopy. Ag nanoparticles (NPs) were self-assembled onto the surface of the grating, which can provide a large amount of "hot-spots" for SERS...
Conference Paper
Full-text available
We experimentally demonstrated that multiplexing of PC sensors with different geometry can achieve a wide dynamic range covering 6 orders of magnitude with potential for 8 or more orders with suitable optimization.
Conference Paper
Full-text available
We experimentally demonstrate a new type of micro-fluid channel design with crossing optical waveguides that not only block any gaps in the microfluidic channels in one fabrication step but also enable nearly lossless optical propagation in the primary waveguides on a chip
Conference Paper
Full-text available
A photonic crystal (PC) waveguide based optical filter that enables dense integration of high sensitivity L55 PC microcavities for biosensor microarrays is demonstrated.
Article
Full-text available
Searching for suitable platinum-free electrocatalysts toward novel iodine-free redox couples is of vital importance for further cost reduction and large-scale implementation of dye-sensitized solar cells (DSCs). Herein, cross-stacked superaligned carbon nanotube (CSCNT) sheets were incorporated as efficient economical cathodes in organic disulfide/...
Article
Full-text available
Carbon nanotube (CNT) films, easily drawn from super-aligned CNT arrays with a large area and a good compatibility with semiconductor technology, have been used as light sensitive materials for infrared (IR) detection. A bolometric CNT detector made from one layer of super-aligned CNT film shows a 15.4% resistance change under 10 mW mm(-2) of IR il...

Projects

Projects (4)
Archived project
Surface Enhanced Raman Scattering (SERS) has significant potential in biomolecule detection due to its extremely high sensitivity in “hot spots”. However, the average sensitivity, repeatability, and reliability of current SERS techniques cannot meet the requirements of many biomedical applications. This project focuses on the development of SERS substrates with universally available Raman “hot spots” for ultrasensitive and well- reproducible biomolecule detection through the combination of resonant photonic devices and metallic nanoentities, which has significant potential for early disease detection and personal diagnostics.
Archived project
Engineering the design of photonic crystal micro-cavity for high-performance chemical and biological sensors.
Archived project
Engineering the design of SWG waveguide to achieve desired performances for telecommunication and sensing applications. For example, SWG waveguide based high-quality factor micro-ring resonators.