3 papers
physics.optics2024
Unified laser stabilization and isolation on a silicon chip
Alexander D. White, Geun Ho Ahn, Richard Luhtaru +8
Rapid progress in photonics has led to an explosion of integrated devices that promise to deliver the same performance as table-top technology at the nanoscale; heralding the next…
astro-ph.CO2024
Witt's hyperbola is both predicted and observed to pass close to the lensing galaxies in quadruple quasars
Paul L. Schechter, Richard Luhtaru
When a rectangular hyperbola is constructed from the image positions of a quadruply lensed quasar, as proposed by Witt (1996), it passes very close to the the lensing galaxy. The m…
astro-ph.GA2021
What Makes Quadruply Lensed Quasars Quadruple?
Richard Luhtaru, Paul L. Schechter, Kaylee M. de Soto
Among known strongly lensed quasar systems, ~25% have gravitational potentials sufficiently flat (and sources sufficiently well aligned) to produce four images rather than two. The…