Namrata is a senior at the University of California, Berkeley, pursuing a Physics (Honors) degree. Her senior thesis, supervised by Professor Naomi Ginsberg, involves understanding the dynamics of self assembly of gold nanocrystal superlattices using optical and x-ray scattering techniques. She has also worked on studying the trajectories of electrons in manganese doped halide perovskites using Monte Carlo simulations.
In 2019, David Cesar received the Particle Accelerator Science & Technology (PAST) Doctoral Student Award from IEEE for contributions to dielectric laser accelerators and time-resolved electron microscopy.
Rafael Piestun for received the 2019 Lab Venture Challenge Award for Ultrathin Endoscopes. Through the Lab Venture Challenge, Venture Partners at CU Boulder funds the top innovations showing high commercial potential, a clear path to a compelling market, and strong scientific support. In just the last 3 years, more than 20 commercially promising projects at CU Boulder have received funding through this program. Those same awards are associated with 16 new startup companies, with many having already raised further capital, demonstrating a powerful way to advance innovative research and translate it into impactful business ventures.
Welcome to the first STROBE research slices seminar, in which a glimpse of the differing and similar ways that we are looking at imaging 2D materials will be provided by speakers from three different STROBE research groups. Dr. Li will discuss in situ visualization of chemical reactions on graphene using interference reflection optical microscopy happening in the Xu group. Dr. Shi will discuss light-induced manipulation of the charge density wave in 1T-TaSe2 happening in the Kapteyn-Murnane group. Finally, Dr. Tian will discuss correlating 3D atomic defects and electronic properties of 2D translation metal dichalcogenides with picometer precision happening in the Miao group. Stay tuned for future STROBE research slices seminars on various imaging science topics.
Applications of Mueller Matrix imaging and sensing are reaching the preclinical setting. Parameters obtained through the Mueller Matrix decomposition have shown relevant correlation to pathological conditions such as cervical cancer, preterm labor, and glaucoma to name a few. These promising clinical research directions will require better standardization of the specific optical modalities as well as better understanding of the Mueller Matrix origin in biomedical media. In this talk I will introduce some computational and experimental efforts directed at quantifying the diagnostic relevant Mueller Matrix parameters originating from biological media.
The editors of Microscopy Today congratulate the winners of the tenth Microscopy Today Innovation Award competition. The ten innovations advance microscopy in several areas: light microscopy, electron microscopy, and scanning probe microscopy. These innovations will make microscopy and microanalysis more powerful, more productive, and easier to accomplish.Secondary Electron Electron-BeamInduced-Current (SEEBIC) Imaging University of California at Los Angeles Developers: Chris Regan and William Hubbard. While intimately related to prior electron-beaminduced-current (EBIC) methods in the SEM, secondary electron electron-beaminduced-current (SEEBIC) imaging is qualitatively and quantitatively different. What makes the SEEBIC system new is that both the secondary electron (SE) and hole signals are detected in a scanning transmission electron microscope (STEM). SEEBIC differs from traditional EBIC in several ways. The measuring circuits are wired differently. In the former case the end of the device remote from the transimpedance amplifier is extremely high impedance, while in the latter it is tied to a low impedance (usually ground) to allow charge neutralization. While traditional EBIC imaging is sensitive to holes, it only generates contrast in regions where the sample supports an electric field that will separate electron-hole pairs. In most samples such regions are special and localized, for example, in a p-n junction. Thus, most of the sample generates no contrast when imaged with traditional EBIC. SEEBIC, on the other hand, is an inevitable consequence of imaging a thin specimen with an energetic electron beam, and SEEBIC imaging generates contrast everywhere in a sample. SEEBIC imaging has not been demonstrated previously for a couple reasons. First, the typical SEM sample is electron-opaque, and primary beam absorption produces a large background; thus, the SEEBIC signal is buried in the noise of the traditional SEM EBIC apparatus. This background is largely absent in the electron-transparent samples used in STEM. Secondly, the secondary electron (SE) yield drops with increasing beam energy; therefore, the SE signal is even smaller in a 200 kV STEM than in a 30 kV SEM. Detection of the signal requires a current measuring system that is low-noise and protected from electromagnetic interference (1 pA EBIC corresponds to ∼6,000 electrons in a 1 ms dwell time). SEEBIC is sensitive to electric potential, electric field, work function, conductivity, and temperature, and it can probe these quantities with atomic resolution in a modern STEM. STEM SEEBIC can image a functioning resistive random access memory (RRAM). For example, in a HfO2-based RRAM, the conducting filament is thought to consist of oxygen vacancies. Oxygen vacancies are basically invisible in a standard STEM image, but they give excellent contrast when viewed with STEM EBIC imaging.
Winners of the R&D 100 Awards have been announced by R&D World magazine and its new parent company, WTWH Media, LLC.
We are proud to announce that the QM Quantum Microscope™ is one of this year’s winners. The QM Quantum Microscope builds on the company’s world leading technology in high harmonic generation to enable a range of techniques including coherent diffraction imaging, photoemission, pump-probe spectroscopy, and EUV metrology.
Primary Contributors to the project include:
JILA: Michael Tanksalvala, Yuka Esashi, Christina Porter, Michael Gerrity, Ting Liao, Margaret Murnane
KMLabs: Seth Cousin, Daisy Raymondson, Brennan Peterson, Henry Kapteyn
“Microscopes illuminated by coherent extreme UV beams are extremely sensitive to structure, composition and function at the nanoscale. They represent an entirely new class of lab scale microscope, with unique capabilities that are critical for future semiconductor, energy, solid state chemistry, and quantum devices.’ Henry Kapteyn, CTO.
About KMLabs: KMLabs is the only commercial provider for comprehensive, end-to-end research systems that leverage ultrafast pulses of extreme UV and soft X-ray light for a variety of experiments. The QM Quantum Microscope™ builds on the company’s world leading technology in high harmonic generation to enable a range of techniques including coherent diffraction imaging, photoemission, pump-probe spectroscopy, and EUV metrology. In addition, KMLabs continues to pioneer the development and engineering of standalone short wavelength sources including the Y-Fi VUV laboratory-based vacuum ultraviolet femtosecond laser source, and the Pantheon™ platform, a pulsed EUV source-beamline to generate and deliver EUV photons to user-supplied experimental stations.
Winners of the R&D 100 Awards have been announced by R&D World magazine and its new parent company, WTWH Media, LLC. “This awards program is so well recognized across the R&D community. Being named as one of the R&D 100 is an incredible honor,” said Paul J. Heney, Vice President, Editorial Director for R&D World. “These 100 winning products and technologies are the disruptors that will change industries and make the world a better place in the coming years.”
Analytical/Test Category:
QM Quantum Microscope – Next Generation Microscopy & Analysis
KMLabs, Inc.
JILA at the University of Colorado, the STROBE center
Winners of the R&D 100 Awards have been announced by R&D World magazine and its new parent company, WTWH Media, LLC. “This awards program is so well recognized across the R&D community. Being named as one of the R&D 100 is an incredible honor,” said Paul J. Heney, Vice President, Editorial Director for R&D World. “These 100 winning products and technologies are the disruptors that will change industries and make the world a better place in the coming years.”
Analytical/Test Category:
QM Quantum Microscope – Next Generation Microscopy & Analysis
KMLabs, Inc.
JILA at the University of Colorado, the STROBE center
A new paper in Nature Photonics from researchers at CU Boulder details impressive improvements in the ability to control the propagation and interaction of light in complex media such as tissue—an area with many potential applications in the medical field. Published Monday, the paper is titled “Wavefront shaping in complex media with a 350 kHz modulator via a 1D-to-2-D transform.” The work was carried out in Professor Rafael Piestun’s lab in the Electrical, Energy and Computing Engineering Department. The team included CU Boulder post-doctoral researchers Omer Tzang and Simon Labouesse, researcher Eyal Niv and CU Boulder graduate student Sakshi Singh. Greg Myatt from Silicon Light Machines, a collaborating company in this project, also worked with the group.