Ming C. Wu (Advisor)

Research Advised by Professor Ming C. Wu

BPN458: Optical Antenna-Based nanoLED

Kevin Han
Seth Fortuna
Matin Amani
2019

Spontaneous emission has been considered slower and weaker than stimulated emission. As a result, light-emitting diodes (LEDs) have only been used in applications with bandwidth 1 GHz. Spontaneous emission is inefficient because the radiating dipole is much smaller than the wavelength and such short dipoles are poor radiators. By attaching an optical antenna to the radiating dipole at the nanoscale, the emission rate can be significantly increased, enabling high modulation bandwidths theoretically 100 GHz. This project focuses on the physical demonstration of this new type of...

BPN788: MEMS-Actuated Grating-Based Optical Phased Array for LIDAR

Xiaosheng Zhang
2019

Optical phased array (OPA) devices that uses diffraction to steer an optical beam have found applications ranging from light detection and ranging (LiDAR), free-space optical (FSO) communications, optical switches, holographic display, biomedical imaging, etc. We aim to integrate the OPA system into the application of automobile navigation, which is currently primarily dominated by opto-mechanical scanning based systems, which are usually bulky and relatively slow thus cannot provide the steering speeds and versatility necessary for many applications. Traditional OPAs are usually...

BPN856: Broadly-Tunable Laser with Self-Imaging Three-Branch Multi-Mode Interferometer

Guan-Lin Su
2019

Tunable lasers with high side-mode suppression ratios (SMSRs) are cost-effective solutions to replace multiple DFB lasers in wavelength-division multiplexing (WDM) systems. Two arm interference-based devices, such as C3- and Y-branch lasers, have advantages over grating- and ring-resonator-based counterparts in terms of cost and fabrication complexities; however, it is fundamentally difficult to achieve high SMSRs and wide tuning ranges simultaneously. In our proposed...

Silicon Photonic Devices for Optoelectronic Integrated Circuits

Ming-Chun Tien
Ming C. Wu
Constance Chang-Hasnain
Xiang Zhang
2009
Electronic and photonic integrated circuits use optics to overcome bottlenecks of microelectronics in bandwidth and power consumption. Silicon photonic devices such as optical modulators, filters, switches, and photodetectors have being developed for integration with electronics based on existing complementary metal-oxide-semiconductor (CMOS) circuits. An important building block of photonic devices is the optical ...

Rapid Synthesis of One-Dimensional Nanostructures via Induction Heating

Brian David Sosnowchik
Liwei Lin
Albert P. Pisano
Ming C. Wu
2008
This work presents the development of a platform technology for the rapid synthesis of a wide range of onedimensional nanostructures using induction heating. The technique is fast, enabling the synthesis of nanostructures in as short as one minute, simple, clean, and scalable. The technique is also versatile, enabling the synthesis of nanostructures in bulk or locally on MEMS, and may open up a new class of rapid nanostructure synthesis. The...

Optoelectronic Manipulation, Assembly, and Patterning of Nanoparticles

Arash Jamshidi
Ming C. Wu
Constance Chang-Hasnain
Liwei Lin
2009
The synthesis of nanostructures has advanced in the last decade to a point where a vast range of insulating, semiconducting, and metallic materials are available in a variety of forms and shapes such as wires, tubes, ribbons, sheets, and spheres. These nanostructures display exceptional physical properties that can be used to realize novel devices such as high-speed electronics, efficient photovoltaics and thermoelectrics, sensitive chemical and biological ...

Optofluidic Devices for Cell, Microparticle, and Nanoparticle Manipulation

Aaron Takami Ohta
Ming C. Wu
Constance Chang-Hasnain
Albert P. Pisano
Kevin Healy
2008
Research in the micro- to nanoscale regimes is facilitated by technologies that enable the addressing of these tiny particles. In biological research, manipulation enables the study of single-cell behavior, as well as the sorting of specific target cells from a mixed population. In engineering applications, micro- and nanoparticles can be assembled to form electronic and optoelectronic devices. Several types of forces can be used to manipulate micro- and...

MEMS Aluminum Nitride Technology for Inertial Sensors

Gabriele Vigevani
Albert P. Pisano
Liwei Lin
Ming C. Wu
2011
The design and fabrication of MEMS Inertial Sensors (both accelerometers and gyro-scopes) made of Aluminum Nitride (AlN) is described in this dissertation. The goal of this work is to design and fabricate inertial sensors based on c-axis oriented AlN polycrystalline thin films. AlN is a post-CMOS compatible piezoelectric material widely used for acoustic resonators, such Bulk Acoustic Wave (BAW) and Lamb Wave Resonators(LWR). In this work we develop the design techniques necessary to obtain inertial sensors...

Monolayer Transition Metal Dichalcogenide NanoLEDs: Towards High Speed and High Efficiency

Kevin Han
Ming C. Wu
Ali Javey
Feng Wang
2019
Onchip optical interconnects promise to drastically reduce energy consumption compared to electrical interconnects, which dominate power dissipation in modern integrated circuits (ICs)One key requirement is a lowpower, highefficiency, and highspeed nanoscale light source. However, existing IIIV semiconductor light sources face a high surface recombination velocity (SRV ~ 104–106cm/s...

Metal Optics Based nanoLEDS: In Search of a Fast, Efficient, Nanoscale Light Emitter

Michael Eggleston
Ming C. Wu
Eli Yablonovitch
Xiang Zhang
2015
Since the invention of the laser, stimulated emission has been the de facto king of optical communication. Lasers can be directly modulated at rates as high as 50GHz, muchfaster than a typical solid statelightemitting diode(LED)that is limited by spontaneous emission to <1GHz. Unfortunately, lasers have a severe scaling problem; they require large cavities operated at high power to achieve efficient lasing. A properly...