70 citations · 201 across the 15 of their papers we have counts for
17 papers
Optimized Bragg Grating Liquid Crystal Solar Sail
Sai Keshav Sasanapuri, Xiulian, Shan +1
We have designed a thin 3-layer sun-facing diffractive Bragg reflector comprised of a chiral polymeric liquid crystal film. Using Rigorous Coupled-Wave Analysis (RCWA), the stack w…
Learning to See Through Flare
Xiaopeng Peng, Heath Gemar, Erin Fleet +3
Machine vision systems are susceptible to laser flare, where unwanted intense laser illumination blinds and distorts its perception of the environment through oversaturation or per…
Cascaded frequency conversion of highly charged femtosecond spatiotemporal optical vortices
Qingqing Liang, Qiyuan Zhang, Dan Wang +6
The degrees of freedom inherent in spatiotemporal optical vortices (STOV's) afford intriguing opportunties to manipulate complex light fields for broad applications such as optical…
Learning to See Through Dazzle
Xiaopeng Peng, Erin F. Fleet, Abbie T. Watnik +1
Machine vision is susceptible to laser dazzle, where intense laser light can blind and distort its perception of the environment through oversaturation or permanent damage to senso…
Broadband Diffractive Solar Sail
Prateek R. Srivastava, Ryan M. Crum, Grover A. Swartzlander
The transverse radiation pressure force and acceleration is compared for two parametrically optimized designs: prismatic and two-pillar metasurface gratings. The numerical results…
High Forward Thrust Metasurface Beam-Riding Sail
Prateek R. Srivastava, Apratim Majumdar, Rajesh Menon +1
The radiation pressure force and torque on a one-dimensional bi-grating composed of a Si-SiO_2 high contrast binary metagrating is analyzed for the purpose of stable beam riding wh…
Solar Sail Propulsion by 2050: An Enabling Capability for Heliophysics Missions
Les Johnson, Nathan Barnes, Matteo Ceriotti +11
Solar sails enable missions to observe the solar environment from unique vantage points, such as sustained observations away from the Sun-Earth line; sub-L1 station keeping; high i…
Theory of Radiation Pressure on a Diffractive Solar Sail
Grover A. Swartzlander
Solar sails propelled by radiation pressure enable space missions that cannot be achieved using chemical rockets alone. Significant in-space propulsion for missions such as a solar…
Flying on a Rainbow: A Solar-Driven Diffractive Sailcraft
Grover A. Swartzlander
Radiation pressure afforded by natural broadband sunlight upon a transmissive diffractive sail is theoretically and numerically investigated. A grating period of one micrometer is…
Measurements of Radiation Pressure owing to the Grating Momentum
Ying-Ju Lucy Chu, Eric M. Jansson, Grover A. Swartzlander
The force from radiation pressure owing to the grating momentum was measured for a thin transmissive fused silica grating near the Littrow angles at wavelengths of 808 nm and 447 n…
Radiation Pressure on a Diffractive Sailcraft
Grover A. Swartzlander
Advanced diffractive films may afford advantages over passive reflective surfaces for a variety space missions that use solar or laser in-space propulsion. Three cases are compared…
Randomized Aperture Imaging
Xiaopeng Peng, Garreth J. Ruane, Grover A. Swartzlander
Speckled images of a binary broad band light source (600-670 nm), generated by randomized reflections or transmissions, were used to reconstruct a binary image by use of multi-fram…
Optimized focal and pupil plane masks for vortex coronagraphs on telescopes with obstructed apertures
Garreth J. Ruane, Olivier Absil, Elsa Huby +5
We present methods for optimizing pupil and focal plane optical elements that improve the performance of vortex coronagraphs on telescopes with obstructed or segmented apertures. P…
Lyot-plane phase masks for improved high-contrast imaging with a vortex coronagraph
Garreth J. Ruane, Elsa Huby, Olivier Absil +4
The vortex coronagraph is an optical instrument that precisely removes on-axis starlight allowing for high contrast imaging at small angular separation from the star, thereby provi…
Zernike amplitude pupil apodization for vortex coronagraphy with obscured apertures
Garreth J. Ruane, Mark R. Dennis, Grover A. Swartzlander
A set of pupil apodization functions for use with a vortex coronagraph on telescopes with obscured apertures is presented. We show analytically that pupil amplitudes given by real-…
Vortex-phase filtering technique for extracting spatial information from unresolved sources
Garreth J. Ruane, Prachyathit Kanburapa, Jiaxuan Han +1
A white light vortex coronagraph was used to experimentally achieve sub-resolution detection. The angular location of the centroid, , and the angular extent of circular pinhole…
Nodal Areas and Structured Darkness
Garreth J. Ruane, Sergei Slussarenko, Lorenzo Marrucci +1
Generalized beams of light that are made to turn inside out, creating black nodal areas of total destructive interference are described. As an example we experimentally created an…