106 citations · 221 across the 8 of their papers we have counts for
9 papers
Chip-scale sub-Doppler atomic spectroscopy enabled by a metasurface integrated photonic emitter
Alexander Yulaev, Chad Ropp, John Kitching +2
We demonstrate chip-scale sub-Doppler spectroscopy in an integrated and fiber-coupled photonic-metasurface device. The device is a stack of three planar components: a photonic mode…
Scalable and Robust Beam Shaping Using Apodized Fish-bone Grating Couplers
Chad Ropp, Dhriti Maurya, Alexander Yulaev +3
Efficient power coupling between on-chip guided and free-space optical modes requires precision spatial mode matching with apodized grating couplers. Yet, grating apodizations are…
Exceptional points in lossy media enable decay-free wave propagation
Alexander Yulaev, Sangsik Kim, Qing Li +4
Waves entering a spatially uniform lossy medium typically undergo exponential decay, arising from either the energy loss of the Beer-Lambert-Bouguer transmission law or the evanesc…
Surface-Normal Free-Space Beam Projection via Slow-Light Standing Wave Resonances in Extra-Large Near-Zero Index Grating Couplers
Alexander Yulaev, Daron A. Westly, Vladimir A. Aksyuk
On-chip grating couplers directly connect photonic circuits to free-space light. The commonly used photonic gratings have been specialized for small areas, specific intensity profi…
Probing Electrified Liquid-Solid Interfaces with Scanning Electron Microscopy
Hongxuan Guo, Alexander Yulaev, Evgheni Strelcov +5
Electrical double layers play a key role in a variety of electrochemical systems. The mean free path of secondary electrons in aqueous solutions is on the order of a nanometer, mak…
Photonic waveguide mode to free-space Gaussian beam extreme mode converter
Sangsik Kim, Daron A. Westly, Brian J. Roxworthy +4
Integration of photonic chips with atomic, micromechanical, chemical and biological systems can advance science and open many possibilities in chip-scale devices and technology. Co…
In aqua electrochemistry probed by XPEEM: experimental setup, examples, and challenges
Slavomír Nemšák, Evgheni Strelcov, Hongxuan Guo +8
Recent developments in environmental and liquid cells equipped with electron transparent graphene windows have enabled traditional surface science spectromicroscopy tools, such as…
Enabling photoemission electron microscopy in liquids via graphene-capped microchannel arrays
Hongxuan Guo, Evgheni Strelcov, Alexander Yulaev +7
Photoelectron emission microscopy PEEM is a powerful tool to spectroscopically image dynamic surface processes at the nanoscale but is traditionally limited to ultra high or modera…
Ambient-Pressure X-ray Photoelectron Spectroscopy through Electron Transparent Graphene Membranes
Jurgen Kraus, Robert Reichelt, Sebastian Gunther +6
Photoelectron spectroscopy (PES) and microscopy are highly demanded for exploring morphologically complex solid-gas and solid-liquid interfaces under realistic conditions, but the…