Fall meeting November 1, 2019

Join us in welcoming Alan Wang from the School of Electrical Engineering and Computer Science at Oregon State University to give a talk entitled:

Silicon Photonic Devices Driven by Transparent Conductive Oxides

Transparent conductive oxide (TCO) materials have attracted escalating research interests for integrated photonic devices in recent years due to the extraordinary perturbation to the refractive indices achieved either through oxygen vacancy doping or electrical gating. In addition, TCO materials can be deposited with high quality using DC- or RF-sputtering on various platforms including silicon photonics, which also possess long term stability. Therefore, TCO materials are fully compatible with silicon photonics and has the potential to be readily integrated with existing silicon photonic integrated circuits (PICs). In this talk, I will review recent research progress in my group for the development of TCO-gated silicon photonic devices, including energy-efficiency silicon-TCO photonic crystal nanocavity modulators, silicon-TCO microring resonators with ultra-large E-O tuning efficiency, and broadband plasmonic-TCO electro absorption modulators. We also achieved 5Gbit/s E-O modulation speed and will also discuss the strategy to further improve the energy efficiency to atto-joule/bit and operation bandwidth above 25 GHz.

Dr. Wang’s bio and abstract is also available here.

Pacific Northwest Optics Workshop-2019

The fourth annual Pacific Northwest Optics Workshop (PNOW) will be held at Oregon Institute of Technology (Wilsonville Campus) on May 4, 2019.

This free workshop is supported by the Optical Society of America (OSA) Columbia Section with cooperation from the OSA Oregon State University, University of Oregon, and Pacific University student chapters. This workshop aims to explore industry and academic efforts in optics in Oregon and Washington. It is a great opportunity for networking within this community! We invite you to forward the details and this announcement to your colleagues! Registration is free and open to the optics community.


Spring meeting April 19, 2019

Join us in welcoming Brian Smith from Oregon Center for Optical, Molecular, and Quantum Science, University of Oregon to give a talk entitled:

Control and measurement of single-photon pulses

The ability to manipulate the spectral-temporal waveform of optical pulses in the classical domain has enabled a wide range of applications from ultrafast spectroscopy to high-speed communications. Extending these concepts to quantum light has the potential to enable breakthroughs in optical quantum science and technology. However, filtering and amplifying often employed in classical pulse shaping techniques are incompatible with non-classical light. Controlling and efficiently measuring the pulsed mode structure of quantum light requires efficient means to achieve deterministic, unitary manipulation that preserves fragile quantum coherences. Here an approach to deterministically modify the pulse-mode structure of quantum states of light within an integrated optical platform is presented. The method is based upon application of both spectral and temporal phase modulation to the wave packet. These techniques lay the ground for future quantum wavelength- and timedivision multiplexing applications and facilitate interfacing of different physical platforms where quantum information can be stored and manipulated.

Read Dr. Smith’s Bio here

Winter meeting February 22, 2019

Join us in welcoming Mark Gesley to give a talk entitled:

Spectral image microscopy for label-free blood and cancer cell recognition

Spynsite LLC

A new approach to cancer cell recognition may improve detection of minimal residual disease from peripheral blood samples. Spectral images of human blood and cancer cells are produced by optical microscopy with filtered broadband visible light elastically scattered from throughout a cell. Cell spectra are assembled from a field of view series of monochromatic images. Exogenous tags, like clusters of differentiation (CD) markers, may introduce a bias and are not required. A prototype transmission optics at ~20x magnification yields images with 0.4 [μm] pixels at a Rayleigh resolution 0.44 ~ 0.54 [μm] over a wavelength range of λ = 440 – 620 [nm] using a xenon arc lamp, monochromator, CCD camera, and objective lens NA = 0.5. A training sample cell may be validated without detailed knowledge of intracellular spectra.  Spectral object classification is scalable to any number of cell types. Small samples of erythrocytes, leukocytes, Jurkat cancer, and non-small cell adenocarcinoma cells are accurately classified and associated with unique cell spatial-spectral characteristics.  A system architecture is described that makes fast, label-free recognition of aberrant blood cells feasible.

Read Dr. Gesley’s bio here.

Fall meeting October 5, 2018

This fall we will hear a talk from Tim Thomas. Tim has a bachelor of science degree in mechanical engineering from Portland State University, a master of science degree in electrical engineering from the Oregon Graduate Institute of Science and Technology, and is a graduate gemologist.  He is director of engineering for Applied Materials at the laser facility in Hillsboro, Oregon, and prior to that was the technical director for optical systems at the Gemological Institute of America (GIA).


“Introduction to Gemstone Optics,” or “Optics of Bling,” will cover the basic elements of gemstone optical performance.   Colored gems absorb light at various wavelengths to produce the color we see, or disperse it to produce the flashes observed in faceted diamonds.  The type of light, such as indoor or outdoor lighting, as well as how the stone was cut can make a substantial difference in the beauty of the gemstone.  The presentation will cover gemstone sample orientation for spectroscopic purposes, spectroscopy of gemstone materials, leading to how we calculate what the expected color will be based on the standard observer CIE L*a*b* procedure.  Knowing the color, the approximate optical path in the gem, and the absorption cross-section for the color centers in a gem, it is possible to approximate the chemical concentration of the color centers.  Also discussed are total internal reflection, pleochroism, birefringence, and dispersion…along with pretty example photos.

Pacific Northwest Optics Workshop 2018

The Pacific Northwest Optics Workshop will be held on May 5, 2018 at Pacific University in Forest Grove, Oregon.

This one day workshop is hosted by the Pacific University chapter of The Optical Society (OSA) along with the OSA Columbia Section and the Oregon State University and University of Oregon OSA chapters. This workshop aims to explore industry and academic efforts in optics in Oregon and Washington. It is a great opportunity for networking within this community! We invite you to forward the details and this announcement to your colleagues! Registration is free and open to the optics community. If you have any questions please email ingriduddscheel@cgresearchllc.com.


PNWOW 2018 Final Program

Forest Grove Eateries

PNWOW 2018 Final Program


Parking Pass

Spring meeting April 13, 2018

Jonathan Klamkin from the Integrated Photonics Laboratory (iPL) at the University of California Santa Barbara will give a talk entitled, “Integrated Photonic Technologies for Communications and Sensing.”


This talk will describe developments in integrated photonic technologies at the University of California Santa Barbara including silicon photonics, indium phosphide, hybrid integration, III-V on silicon heteroepitaxy, and electronic-photonic integration. Applications for these technologies include telecommunications, data center communications, microwave photonics, free space communications, lidar, and remote sensing. So called photonic integrated circuits (PICs) dramatically reduce the cost, size, weight and power (CSWaP) of photonic systems enabling high-volume applications and deployment on small platforms.

Pacific Northwest Optics Workshop Call for Papers

The third annual Pacific Northwest Optics Workshop will be held at Pacific University on May 5, 2018.  This free workshop is supported by the Optical Society of America (OSA) Columbia Section with cooperation from the OSA Oregon State University and University of Oregon student chapters that hosted the first and second workshops in May 2016 and May 2017.

This is the first call for presentations that will be 15 to 20 minutes in length.  Contributions by universities and industry are encouraged as the intent of the workshop is to foster collaboration between optical researchers and workers in the Pacific Northwest.

Please submit a short abstract that includes the names of presenters, title of the presentation, a short summary and contact information to:  Professor Karl Citek, citekk1@pacificu.edu, Professor James Butler, jjbutler@pacificu.edu, and Eric Udd, ericudd@cgresearchllc.com.

Early submissions are encouraged as the release of the final program is planned to occur in late March or early April.

Winter meeting February 23, 2018

Jan Kleinert from ESI will give a talk entitled, “Laser ablation of copper for microelectronics.”


Copper is one of the more common elements in the microelectronics industry. We review the broad existing and emerging approaches for copper laser ablation in the context of via drilling: from the MIR to UV, microsecond to femtosecond pulse widths, kHz to GHz repetition rates. Different beam shaping and steering techniques are used to optimize throughput, cost and quality. Modeling the hydrodynamics, thermodynamics and plasma physics behind these approaches quantitatively remains a challenge, but is making progress. We show some of our latest results.