Realization of on-chip lasers in crystalline double tungstate waveguides using focused-ion-beam nanostructuring

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Ay, Feridun and Geskus, Dimitri and Aravazhi, Shanmugam and Pollnau, Markus (2012) Realization of on-chip lasers in crystalline double tungstate waveguides using focused-ion-beam nanostructuring. In: 8th Nanoscience and Nanotechnology Congress, Nano-TR VIII 2012, 25-29 June 2012, Ankara, Turkey (pp. Paper OP-113).

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Abstract:We report our recent work on obtaining on-chip lasers in crystalline double tungstate waveguides using focused-ion-beam (FIB) nanostructuring. Photonic cavity structures were defined by forming deeply etched Bragg gratings in KGdxLu1-x(WO4)2:Yb3+ using FIB milling. The FIB milling procedure was optimized and gratings more than 4 μm in depth with an improved total sidewall angle of about 5 degrees were achieved. Their optical performance was assessed at 1530 nm in Fabry-Pérot microcavities realized on the waveguides. An on-chip integrated laser cavity at 980 nm was achieved by defining a FIB reflective grating and FIB-polished waveguide end-facet. With this cavity, an on-chip integrated waveguide laser in crystalline potassium double tungstate was demonstrated for the first time.
Item Type:Conference or Workshop Item
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Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Link to this item:http://purl.utwente.nl/publications/80655
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