Corey A. Richards
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View article: Diffractive microoptics in porous silicon oxide by grayscale lithography
Diffractive microoptics in porous silicon oxide by grayscale lithography Open
We demonstrate focusing as well as imaging using diffractive microoptics, manufactured by two-photon polymerization grayscale lithography (2GL), that have been 3D printed into porous silicon oxide. While typical doublet lens systems requir…
View article: Low loss fiber-coupled volumetric interconnects fabricated via direct laser writing
Low loss fiber-coupled volumetric interconnects fabricated via direct laser writing Open
Photonic integrated circuits (PICs) are vital for high-speed data transmission. However, optical routing is limited in PICs composed of only one or a few stacked planes. Further, coupling losses must be low in deployed systems. Previously,…
View article: Hybrid achromatic microlenses with high numerical apertures and focusing efficiencies across the visible
Hybrid achromatic microlenses with high numerical apertures and focusing efficiencies across the visible Open
Compact visible wavelength achromats are essential for miniaturized and lightweight optics. However, fabrication of such achromats has proved to be exceptionally challenging. Here, using subsurface 3D printing inside mesoporous hosts we de…
View article: Enabling High Precision Gradient Index Control in Subsurface Multiphoton Lithography
Enabling High Precision Gradient Index Control in Subsurface Multiphoton Lithography Open
Multiphoton lithography inside a mesoporous host can create optical components with continuously tunable refractive indices in three-dimensional (3D) space. However, the process is very sensitive at exposure doses near the photoresist thre…
View article: Thermally Responsive Hydrogels for Passive Temperature Regulation under Direct Sunlight
Thermally Responsive Hydrogels for Passive Temperature Regulation under Direct Sunlight Open
By spontaneously emitting midinfrared radiation to outer space through the atmospheric window and reflecting sunlight, daytime radiative coolers achieve notable passive cooling performance. However, existing daytime radiative cooling syste…
View article: CCDC 2176963: Experimental Crystal Structure Determination
CCDC 2176963: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2156526: Experimental Crystal Structure Determination
CCDC 2156526: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2156527: Experimental Crystal Structure Determination
CCDC 2156527: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2156525: Experimental Crystal Structure Determination
CCDC 2156525: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: CCDC 2074416: Experimental Crystal Structure Determination
CCDC 2074416: Experimental Crystal Structure Determination Open
View article: CCDC 2074417: Experimental Crystal Structure Determination
CCDC 2074417: Experimental Crystal Structure Determination Open
View article: CCDC 2096003: Experimental Crystal Structure Determination
CCDC 2096003: Experimental Crystal Structure Determination Open
View article: Direct laser writing of volumetric gradient index lenses and waveguides
Direct laser writing of volumetric gradient index lenses and waveguides Open
Direct laser writing (DLW) has been shown to render 3D polymeric optical components, including lenses, beam expanders, and mirrors, with submicrometer precision. However, these printed structures are limited to the refractive index and dis…
View article: Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles
Optically anisotropic porous silicon microlenses with tunable refractive indexes and birefringence profiles Open
The effect of spatially varying birefringence on the focusing behavior of porous silicon (PSi) and porous silicon dioxide (PSiO 2 ) gradient refractive index (GRIN) lenses is investigated. Both materials attain broad, tunable refractive in…