NanoPlasmonics, Microphotonics & Imaging

Research that includes:

  • Polymer, printed optical lenslet arrays
  • Microfluidic tuneable photopolymer lenses
  • Optical switches and planar lightwave MEMS
  • Vertically integrated microconfocal arrays
  • Bio-inspired integration of tuneable polymer optics with imaging electronics

BPN960: Low-Loss Silicon Photonic MEMS Switches

Amirmahdi Honardoost
Johannes Henriksson
Kyungmok Kwon
Jianheng Luo
Jean-Etienne Tremblay
Mizuki Shirao
2021

Our group has previously developed a new architecture suitable for building large-scale MEMS-based silicon photonics optical switches with fast response time. Switches with the scale of 240x240 were demonstrated using our new architecture consisting of an in-plane optical crossbar network with MEMS-actuated couplers implemented on a silicon photonics platform. Increasing the integration level up to 1000x1000 switches and beyond can result in a significant overall optical loss. In a new project we are aiming to develop low-loss switch units in order to address the aforementioned issue by...

BPN957: MEMS Switch Based Integrated FTIR

Jianheng Luo
Johannes Henriksson
2022

This project aims to develop integrated FTIR technology for material detection using MEMS-based photonic switch as building block. This implementation of integrated FTIR promises high resolution (1cm^-1) on small chip size ( 5mm x 5mm).

BPN955: Nanostructured Plasmonic Biosensor

Kamyar Behrouzi
2022

In this project, we are developing at-home biosensor that enables people to test for specific biomarkers simply at their home. By harnessing nanoplasmonic effects in metallic nanoparticles, we aim to present highly sensitive, rapid, simple and inexpensive diagnostic method which can detect tiny number of biomarkers and antigens in real human sample. We hope to develop our method specifically for virus detection to combat future pandemics.

BPN925: Perfectly Bright Low Dimensional Semiconductors

Shiekh Zia Uddin
Jongchan Kim
2022

Most optoelectronic devices operate at high photocarrier densities, where all semiconductors suffer from enhanced nonradiative recombination. Nonradiative processes proportionately reduce photoluminescence (PL) quantum yield (QY), a performance metric that directly dictates the maximum device efficiency. Although transition metal dichalcogenide (TMDC) monolayers exhibit near-unity PL QY at low exciton densities, nonradiative exciton-exciton annihilation (EEA) enhanced by van-Hove singularity (VHS) rapidly degrades their PL QY at high exciton densities and limits their utility in...

BPN751: Large-Scale Silicon Photonic MEMS Switch with Sub-Microsecond Response Time

Johannes Henriksson
Jianheng Luo
Amirmahdi Honardoost
2022

We developed a new architecture suitable for building a large-scale optical switch with fast response time. We have demonstrated switches with a scale of 240x240 and speed of sub microsecond using our new architecture. The switch architecture consists of an optical crossbar network with MEMS-actuated couplers and is implemented on a silicon photonics platform. To our knowledge this is the largest monolithic switch, and the largest silicon photonic integrated circuit, reported to date. The passive matrix architecture of our switch is fundamentally more scalable than that of multistage...

BPN721: FMCW LiDAR for Distance and Velocity Detection with Large Range and High Resolution

Xiaosheng Zhang
Kyungmok Kwon
2021

3D imaging sensors have applications that span several industries and markets, from industry metrology, robotic control to autonomous vehicles. Frequency-modulated continuous-wave (FMCW) light detection and ranging (LiDAR) systems provide high-resolution anti-interference distance and velocity measurements without fast electronics or high optical power but typically require expensive narrow-linewidth lasers with complex feedback circuits. Instead, we report on linearizing the laser chirp by using iterative learning pre-distortion of the laser drive waveform, thus reducing the need for...

BPN869: Efficient Waveguide-Coupling of Electrically Injected Optical Antenna-LED

Nicolas M. Andrade
2021

Optical interconnects require fast and efficient electrically-injected nanoscale light sources that can be coupled efficiently to a low-loss photonic waveguide. The spontaneous emission rate can be increased by coupling the active region of a nanoscale emitter to an optical antenna, which would allow for modulation rates greater than 50 GHz. The aim of this project is to demonstrate high waveguide-coupled external quantum efficiency of an optical antenna to a single mode InP waveguide.

Project ended: 05/01/2021

BPN882: An Ultra-Thin Molecular Imaging Skin for Intraoperative Cancer Detection Using Time-Resolved CMOS Sensors

Hossein Najafi
2021

Successful treatment of cancer requires targeted and individualized treatment, and subsequently an assessment of the state of the tumor being examined, both gross and microscopic, however oncologists have no method of identifying microscopic tumor in the patient. This results in tumor cells being left behind in patients undergoing surgery. Currently, the only way to determine the presence of any microscopic residual is to examine the excised tumor, stained with a proper marker, under a microscope, which only adds to the complexity and length of the surgery and treatment. The two current...

BPN933: Ag@MIL-53 Core-Shell Nanostructures for SERS-Based Chemical Analysis

Aifei Pan
Yong Xia
Adrian K. Davey
2021

A large number of poisonous chemicals, such as PFOA, PFOS, and mercury ions, are mandated to be controlled in drinking water with their permissible concentrations below parts-per-billion (ppb). In this context, an increase in the concentration is a necessary step preceding detection. Apart from their selective absorption ability, metal-organic frameworks (MOFs) have an extraordinarily large internal surface area, which can be used for extraction. In terms of detection methods, Raman spectroscopy is a powerful non-invasive chemical detection technology characterized by portability,...

BPN551: Large, Ordered 3D Nanocup Arrays for Plasmonic Applications

Joanne Lo
2010

Here we present a novel method for fabricating large, ordered arrays of 3D nanocups for plasmonic applications. Previously, it has been demonstrated that nanocups provide a unique method for bending scattered light by creating “magnetic plasmon” responses in optical frequencies. However, creating large, ordered arrays of nanocups has remained a significant challenge. We constructed a large (0.5 cm X 1.0 cm), ordered array of nanocups via nanoimprint lithography (NIL), soft lithography, and shadow evaporation. This methodology enables high control over the shapes and optical...