July 18, 2016
Millimeter-Wave Compressive Imaging with Metamaterial Antennas
We have developed novel compressive imaging approaches in the millimeter wave bands (18-26 GHz, 85-110 GHz) using metamaterial antennas. The metamaterial antennas are designed to exploit extreme frequency diversity in their radiated modes to enable rapid single-shot image reconstruction from sparse measurements. Applications include spaceborne imaging radars as well as indoor personal security.
MIMO Wireless Power Transfer for Mobile Devices
We have developed novel strategies for exploiting multiple-input and multiple-output (MIMO) channels for wireless power transfer (WPT). Through the use of backscatter channel measurement, the channel state information for each mobile device can be rapidly acquired at minimal energy cost. We have demonstrated selective WPT enhancement of ~10X and selective WPT denial of greater than…
Energy Efficient Modulated Backscatter Communication
We have developed several new approaches to modulated backscatter communication, including the first demonstration of quadrature amplitude modulated (QAM) backscatter at 96 megabits as well as the first demonstration of “Bluetooth Backscatter” devices that are compatible with absolutely unmodified Bluetooth devices. No hardware, firmware or software modifications are needed to receive these signals, yet their…
Wearable and Implantable Biomedical Devices
We have developed several new approaches for efficiently powering battery-free wearable and implantable devices, including the use of metamaterial lenses for near-field focusing. Additionally, we have applied backscatter communication to wearable and implantable devices to achieve extraordinary data throughput compared to conventional Medical Implant Communication Service (MICS) radios. We have developed example biomedical devices such…
Ultra-Broadband Millimeter Wave Communication
The spectrum available above 24 GHz, commonly referred to as the millimeter wave (mmWave) band, is sparsely occupied and presents opportunities to address future wireless infrastructure demands. Exploiting these higher frequency bands requires new strategies to realize small, low-cost, broad bandwidth and low power hardware solutions. This research seeks to realize practical low-power, ultra-broadband (20GHz+),…
Molecular Programming with DNA Strand Displacement Reactions
It is hard to imagine that any device approaching the complexity of modern electronics could be built without a principled synthesis method. In contrast, engineering of biological and chemical systems to a large extent remains a process of trial and error. A framework for rapidly synthesizing functional molecular systems based on an abstract specification would…
Nanoscale magnetic sensor for biophysical imaging
We have developed a wide-field magnetic sensor, based on the quantum properties of defects in diamond, capable of detecting single 19 nm diameter magnetic particles at ambient conditions. The platform is being developed further to enable the study of biophysical phenomena via magnetic labels.
Programming Gene Expression
Controlling the timing and location of gene expression is desirable for a wide range of applications in biology and medicine. For example, an ideal cancer treatment combines strong therapeutic action in tumor cells with minimal side effects in surrounding healthy tissue. To achieve such specificity, we need to develop molecular control circuitry that can autonomously…
DNA Information Storage
Synthetic DNA sequences are attractive for digital data storage because information can be encoded with extremely high density, with a theoretical limit above 1 EB/mm3 (eight orders of magnitude denser than magnetic tape). Additionally, it is long lasting, with an observed half-life of over 500 years in some environments. To wit, DNA has even been…
Donors and Acceptors in Semiconductors as Quantum Bits
We investigate the optical and spin properties of donors and acceptors in numerous semiconductors (including InP, GaAs and CdTe) to determine their suitability as quantum bits and ensemble-based quantum memory.
Previous page Next page