News

Our open-access paper entitled "THz-TDS with gigahertz Yb-based dual-comb lasers: noise analysis and mitigation strategies", published in Applied Optics, has been highlighted as an Editor's Pick.

Ursula Keller is ranked 4 in Switzerland among Top Female Scientists for 2023

Prof. Keller is increasingly concerned about “hostility” towards excellent women in leadership positions in STEMM (i.e. science, technology, engineering, mathematics and medicine) fields, which she sees as a key challenge for further progress in gender diversity. In this news item Prof. Keller summarizes her talk given first at CLEO USA 2023 as a plenary talk and more recently at an IEEE meeting in Italy.

Our manuscript “Ultrafast Yb:YAG laser oscillator with gigahertz repetition rate” has been selected as the Editor’s Pick in Optics Express.

Prof. Ursula Keller gives a plenary talk at CLEO US 2023 on Diversity, Equity & Inclusion (DEI)

Absorption of light adds energy to a material. The electrons inside the material can react collectively or independently to that energy. Here, the dominant reaction pattern should not depend on perspective. However, in compound semiconductors, surprisingly, divergent responses are obtained depending on which atomic constituent is consulted. Knowledge of both perspectives is necessary to optimize new materials for applications in electronics and optoelectronics.

Our manuscript "Coherently averaged dual-comb spectroscopy with a low-noise and high-power free-running gigahertz dual-comb laser" has been selected as the Editor’s Pick in Optics Express.

We have invented two new methods for multiplexing a single laser cavity to support a pair of noise-correlated, yet cavity length independent optical frequency combs.