Université de Neuchâtel

Quantum-well intermixing for fabrication of lasers and photonic integrated circuits

Hofstetter, Daniel ; Maisenhölder, B. ; Zappe, H. P.

In: Journal of Selected Topics in Quantum Electronics (IEEE), 1998, vol. 4, no. 4, p. 794-802

Various applications of quantum-well intermixing, ranging from multiwavelength lasers to complex photonic integrated circuits, are described. The fabrication of these GaAs-AlGaAs-based devices relies on the postgrowth definition of regions with varying bandgap, enabling the manufacture of wavelength shifted modulators and lasers, as well as the integration of transparent waveguides with absorbing...

Université de Neuchâtel

Tuning the resonance of a photonic crystal microcavity with an AFM probe

Märki, Iwan ; Salt, Martin Guy ; Herzig, Hans-Peter

In: Optics Express, 2006, vol. 14, no. 7, p. 2969-2978

We present theoretical and experimental results on switching and tuning of a two-dimensional photonic crystal resonant microcavity by means of a silicon AFM tip, probing the highly localized optical field in the vicinity of the cavity. On-off switching and modulation of the transmission signal in the kHz range is achieved by bringing an AFM tip onto the center of the microcavity, inducing a...