title: Thermal bistability-based method for real-time optimization of ultralow-threshold whispering gallery mode microlasers.
abstract: A method based on thermal bistability for ultralow-threshold microlaser optimization is demonstrated. When sweeping the pump laser frequency across a pump resonance, the dynamic thermal bistability slows down the power variation. The resulting line shape modification enables a real-time monitoring of the laser characteristic. We demonstrate this method for a functionalized microsphere exhibiting a submicrowatt laser threshold. This approach is confirmed by comparing the results with a step-by-step recording in quasi-static thermal conditions.
authors.affiliation: Laboratoire Kaster Brossel, ENS, UPMC, CNRS, 24 rue Lhomond, 75231 Paris cedex 05, France.
authors.forename: Guoping
authors.initials: G
authors.lastname: Lin
authors.forename: Y
authors.initials: Y
authors.lastname: Candela
authors.forename: O
authors.initials: O
authors.lastname: Tillement
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Cai
authors.forename: V
authors.initials: V
authors.lastname: Lefèvre-Seguin
authors.forename: J
authors.initials: J
authors.lastname: Hare