Wisconsin Alumni Research Foundation

Technology

Tunable, Silicon-Based Fresnel Lenses

A Fresnel lens or ‘zone plate’ is a type of compact lens made of concentric rings that alternate between opaque and transparent materials. The design is lighter and smaller than conventional lense...
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Hongrui Jiang, Yen-Sheng Lu, Hewei Liu | P140128US01

Technology

Strain-Tunable Light Emitting Diodes Using Germanium

Germanium (Ge), a group-IV semiconductor material, is crucial to many established and potential technologies. In optoelectronics, Ge has been used as a photodetector material for on-chip data distribu...
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Max Lagally, Jose Sanchez Perez | P140041US01

Technology

Compact Spectrometer

Spectrometers are optical instruments used to measure light. They work by detecting spectral lines and measuring their wavelength or intensity. Spectrometers have many applications, including telecomm...
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Zongfu Yu | P140145US01

Technology

More Flexible Microlens Assembly

‘Variable-focus’ lenses are lenses that have adjustable focal lengths. Liquid-based, miniaturized lenses of this type are useful in photonics, display systems and biomedical tools. However...
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Hongrui Jiang, Chenhui Li | P120362US01

Technology

Micromachined Shock Sensor

Shock sensors are accelerometers that respond to specific levels of acceleration. The design usually consists of a proof mass and a flexible suspension. At a preselected level of acceleration, th...
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Yogesh Gianchandani, Shamus McNamara | P01336US

Technology

Variable-Focus Lens Assembly

One component of lab-on-a-chip technology is on-chip microlenses for optical analysis. Prior investigators have demonstrated tiny optical lenses with variable focal lengths. These lenses use specializ...
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Hongrui Jiang, Abhishek Agarwal, Liang Dong, David Beebe | P05131US

Technology

Machining of Lithium Niobate by Laser Fracturing

Lithium niobate is used in the fabrication of a wide variety of optical and electro-optic devices, including optical modulators, switches, frequency shifting devices, polarized controllers and pulsed ...
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Leon McCaughan, Chad Staus | P02194US

Technology

Nanoelectromechanical Switch in Co-Planar Waveguide

Microelectromechanical systems (MEMS) and nanoelectromechanical systems (NEMS) have been used to create mechanical resonators for switching, filtering and other purposes in electrical systems. NEMS/ME...
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Robert Blick, Hua Qin, Hyun-Seok Kim | P07084US

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