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1. Ultrafast observation of intense light-matter interactions in flexible glass via single-shot frequency domain holography

   https://doi.org/10.1364/FIO.2020.FM1C.4  

   Dempsey, Dennis; Nagar, Garima C.; Renskers, Christopher K.; Grynko, Rostislav I.; Sutherland, James S.; Shim, Bonggu (September 2020, Frontiers in Optics / Laser Science)

   We use frequency domain holography (FDH) to spatio-temporally visualize the laser-matter interaction caused by the optical Kerr effect and plasma in flexible Corning® Willow® Glass in a single-shot. 

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2. Single-shot ultrafast visualization of plasma dynamics and nonlinear index of refraction in flexible glass using frequency domain holography

   Dempsey, Dennis; Nagar, Garima; Renskers, Christopher; Grynko, Rostislav; Sutherland, James; Shim, Bonggu (October 2019, APS Division of Plasma Physics Meeting 2019)

   We measure the nonlinear index of refraction (n2) and investigate plasma dynamics in flexible Corning® Willow® Glass using single-shot Frequency Domain Holography (FDH). Flexible glass has received a lot of attention recently due to various applications such as 3-D photonics and wearable devices. Femtosecond laser micromachining (FLM) is a viable tool to fabricate these devices because of minimal thermal effects and thus enables fabrication of small and clean 3-D structures. To control and understand the underlying dynamics of FLM, ultrafast visualization of plasma and optical Kerr effect is important. FDH is a robust femtosecond time-resolved technique in which chirped reference and probe pulses centered at 404 nm are used to measure and visualize the plasma and Kerr effect produced by an intense, ultrashort pump pulse centered at 808 nm. Using FDH, we study laser-matter interactions in Willow Glass and measure its n2 to be 3.41 +/-0.08 ×10-16 cm2/W and visualize the plasma dynamics. 

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3. Corrigendum: Stereovision Combined with Particle Tracking Velocimetry Reveals Advection and Uplift Within a Restraining Bend Simulating the Denali Fault

   https://doi.org/10.3389/feart.2019.00253  

   Toeneboehn, K.; Cooke, M.; Bemis, S.; Benowitz, J. (October 2018, Frontiers)

   Scaled physical experiments allow us to directly observe deformational processes that take place on time and length scales that are impossible to observe in the Earth’s crust. Successful evaluation of advection and uplift of material within a restraining bend along a strike-slip fault zone depends on capturing the evolution of strain in three dimensions. Consequently, we require deformation within the horizontal plane as well as vertical motions. While 3D digital image correlation systems can provide this information, their high costs have prompted us to develop techniques that require only two DSLR cameras and a few Matlab® toolboxes, which are available to researchers at many institutions. Matlab® plug-ins can perform particle image velocimetry (PIV), a technique used in many analog modeling studies to map the incremental displacements fields. For tracking material advection throughout experiments more suitable Matlab® plug-ins perform particle tracking velocimetry (PTV), which tracks the complete two-dimensional displacement path of individual particles. To capture uplift the Matlab® Computer Vision ToolboxTM, uses pairs of photos to capture the evolving topography of the experiment. The stereovision approach eliminates the need to stop the experiment to perform 3D laser scans, which can be problematic when working with materials that have time dependent rheology. We demonstrate how the combination of PIV, PTV, and stereovision analysis of experiments that simulate the Mount McKinley restraining bend reveal the evolution of the fault system and three-dimensional advection of material through the bend. 

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4. High Aspect Ratio Glass Microstructures by Laser Induced Etching

   Cheng, J.; Patel, H.; Hui, E. (December 2022, IEEE EMBS Micro and Nanotechnology in Medicine Conference (MNMC))

   Laser Induced Deep Etching (LIDE®), developed by LPKF, is a maskless laser processing method capable of patterning glass microstructures similar to microfluidics created by PDMS soft lithography. Here, we demonstrate a self-digitized droplet microfluidics chip with high aspect-ratio features and fine resolution via the LIDE® technology. LIDE® provides the means to translate microfluidic designs into glass in a process suitable for low-cost and high-volume manufacturing. 

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5. Patterning ITO using a laser cut Kapton® tape mask for flexible PVDF applications

   https://doi.org/10.1109/IFETC53656.2022.9948485  

   Schvaneveldt, K.M.; Laughlin, A.; Shurilla, K.; Johnson, L.; Staker, J.; Hunsaker, Q.; Smalley, D.E. (August 2022, International Flexible Electronics Technology Conference IFETC)

   This work describes a novel approach to patterning Indium Tin Oxide (ITO) on Polyvinylidene Fluoride (PVDF) using a laser cut Kapton® tape mask for rapid prototyping. Measurements taken before and after experimentation conclude a non-significant change in sheet resistance while using this method to pattern with a p-value of 0.2947 for a two-tailed paired t-test for significance. 

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