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Opto-Electronics

General Scientific Contacts: Johan Stiens and Maarten Kuijk

Infrared opto-electronic components

Scientific Contact: Johan Stiens

To enable efficient manipulation, modulation and detection of infrared radiation, going from the near-IR wavelengths from solid-state lasers (about 1 m) up to mid-infrared wavelengths of CO2 lasers (9-11 micron wavelength or 30 THz).

• Modulation techniques and technologies to modulate and Q-switch infrared lasers based on novel thin disk semiconductor based devices and/or transverse laser mode switching principles.

• Investigation of Seebeck based detector and cameras for high power CO2 lasers (9-11 micron wavelength - 30 THz) going from giant sub-ns pulses up to CW detection: opto-electronic designs in III-V semiconductors and noise reduction techniques.

Photonic control of mm wave devices

Scientific Contact: Johan Stiens

To enable efficient manipulation (amplitude and/or phase modulation and switching) of passive or active mm waves devices, operating in the 30 to 300 GHz range. It offers advantages due to the galvanic shielding. Main focus is on passive devices, including photonic control of antenna arrays or frequency selective surfaces.

Radial and azimuthal polarizers

Scientific Contact: Johan Stiens

These polarization states allow for better focusing of electromagnetic radiation. This will lead to higher performing applications: better resolution in optical data storage, higher resolution in imaging or higher processing speeds in laser based industrial material processes. Solutions are investigated which can be fabricated with micro-electronic technologies.

CMOS opto-electronic devices and circuits

Scientific Contact: Maarten Kuijk

The goal of this research is detect light in CMOS and in order to be able to conceive novel applications. Using standard CMOS processes is a challenge especially when special goals are envisaged, like high speed, low power, or mixing of the detected light with an electrical signal. High-speed optical communication, efficient 3D time-of-flight image sensors and fluorescence lifetime imaging are some of the possible end-applications.