NanoTechnology: Materials, Processes & Devices

Research that includes:

  • Development of nanostructure fabrication technology
  • Nanomagnetics, Microphotonics
  • CMOS Integrated Nanowires/Nanotubes (CMOS-Inn)

Towards A Wireless Image Sensor for Real-Time Fluorescence Microscopy in Cancer Therapy

Rozhan Rabbani
Hossein Najafi
Micah Roschelle
Efthymios Papageorgiou
Rebekah Zhao
Mohammad Merah Ghanbari
Rikky Muller
Vladimir Stojanović
Mekhail Anwar
2024

We present a mm-sized, ultrasonically powered lensless CMOS image sensor as a progress towards wireless fluorescence microscopy. Access to biological information within the tissue has the potential to provide insights guiding diagnosis and treatment across numerous medical conditions including cancer therapy. This information, in conjunction with current clinical imaging techniques that have limitations in obtaining images continuously and lack wireless compatibility, can improve continual detection of multicell clusters deep within tissue. The proposed platform incorporates a...

BPN986: Integrated Microlens Coupler for Photonic Integrated Circuits

Jianheng Luo
Johannes Henriksson
2024

We design and experimentally demonstrate a new silicon photonic fiber coupling method using integrated microlens couplers. Efficient, broadband and polarization-insensitive coupling to a single mode fiber with a best coupling loss of 0.8 dB is achieved.

Project currently funded by: Industry Sponsor

**Project merged with BPNX1012 on 08/14/2024**

BPNX1009: Piezoelectric Silicon Photonic MEMS Switch

Joseph Suh
2024

Integrated silicon photonic switches enable routing of optical signals and real-time reconfiguration of the optical networks in data centers and high performance computers. Reducing the operating voltage while preserving the required switching properties is vital to realize their full potential for real-time routing driven by CMOS electronics. Silicon photonic MEMS switches, based on electrostatic actuation, have employed high voltages because of constraints in mechanical designs aimed at eliminating parasitic effects. On the other hand, recent developments in piezoelectric thin...

BPN947: High-Performance Mid-Infrared Optoelectronics

Shu Wang
Naoki Higashitarumizu
Shogo Tajima
2024

Black phosphorus has emerged as a unique optoelectronic material, exhibiting tunable and high device performance from mid-infrared to visible wavelengths. Understanding the photophysics of this system is of interest to further advance device technologies based on it. Here we report the thickness dependence of the photoluminescence quantum yield at room temperature in black phosphorus while measuring the various radiative and non-radiative recombination rates. As the thickness decreases from bulk to ~4 nm, a drop in the photoluminescence quantum yield is initially observed due to enhanced...

YoungJun Kim

Graduate Student Researcher
Chemical and Biomolecular Engineering
Professor Roya Maboudian (Advisor)
Ph.D. 2025 (Anticipated)

visiting scholar in Chemical and Biomolecular Engineering department, University of California, Berkeley, USA.

PhD candidate in Chemical and Biomolecular Enginnering department, Yonsei University, Seoul, Korea

BS degree was obtained in Chemical and Biomolecular Engineering department, Yonsei University, Seoul, Korea

BPN989: Defect-Induced Piezoelectricity in Silicon

Zihuai Zhang
Kadircan Godeneli
2024

Silicon, a mature platform for the semiconductor industry, has become a leading platform for future quantum technologies. As a high-purity material, it serves as a low-noise host for a variety of quantum defects. As a low-loss material, it is a desirable substrate and material platform for next generation quantum devices. However, the lack of piezoelectricity in silicon, due to its centro-symmetric structure, poses challenges for its electromechanical applications. For example, one common approach to realize electromechanics in silicon relies on hybrid integration with a different...

BPNX1000: Atomic Force Nanomechanical Qubit (New Project)

Shahin Jahanbani
Binhan Hua
Kadircan Godeneli
Haoxin Zhou
Zihuai Zhang
2024

Ultralong lifetimes of silicon nanomechanical resonators at cryogenic temperatures and microwave frequencies make them promising resources in quantum engineering. In this work, we propose a nanomechanical qubit achieving strong single-phonon level anharmonicity of 5 MHz without the need for coupling to an ancillary qubit of a hybrid quantum architecture. This qubit design combines a nano-machined silicon cantilever brought in proximity to a silicon surface using microelectromechanical actuators. The surface forces between the cantilever and the silicon surface provide an effective...

BPN837: Metal Oxide-Coated Carbonized-Silicon Nanowires as High-Performance Micro-Supercapacitor

Dr. Yuan Gao
Sinem Ortaboy
Chuan-Pei Lee
2016

With the rapid development of modern digital technology, micro-supercapacitors show tremendous potential to complement or replace conventional electrolytic capacitors and batteries due to their small dimension, high power density, high electrochemical efficiency and long cyclic life. In particular, porous silicon nanowires (PSiNWs) and their derivatives have attracted great attention owing to their high surface areas and ease of integration with the microfabrication methodology. In this project, we are developing a novel metal oxide-coated carbonized PSiNWs electrodes for micro-...

BPN988: Modulation of Optoelectronics in Quantum Dot Film

I K M Reaz Rahman
Naoki Higashitarumizu
2023

Core/shell quantum dots are known to have high photoluminescence quantum yield for their passivation through thicker shell by suppressing surface trap states. In spite of their excellent exciton dynamics, these bright quantum dots tend to suffer from stability issues and degradation over time. Here we investigate their photo-physical properties due to charge injection, which leads to unfavorable recombination pathways through charged excitons. This provides an additional tuning knob for modulation of their photoluminescence quantum yield after synthesis, thereby offering a means of...

BPN940: Self-Healing Materials for Sensing and Energy Harvesting Applications

Peisheng He
Zihan Wang
2024

Animal skins often possess both functions of sensing and actuating to detect external stimulations and change shapes when needed, respectively. Furthermore, many animals, such as jellyfish and leptocephalus (eel larvae) have tissues that are transparent and ultra-stretchable, which are difficult to build in synthetic sensors and actuators. Moreover, all these living skins have self-healing properties, i.e. to restore their critical functions after being damaged. On the contrary, artificial electronic systems are often brittle and non-transparent. As such, biomimetic, skin-like materials...