This work demonstrates a vertical cavity surface emitting laser consisting of a thin film of quantum dots (QDs) embedded between two layers of polymerized chiral liquid crystal. Forward-directed, circularly polarized defect mode lasing is achieved under nanosecond-pulsed excitation. The resulting free-standing, flexible film exhibits stable, long-term narrow-linewidth lasing under water at room temperature, with lasing wavelength sensitive to pressure, strain, and temperature, enabling its use as a sensor.
Publisher
Light: Science & Applications
Published On
Authors
Mohammad Mohammadimasoudi, Pieter Geiregat, Frederik Van Acker, Jeroen Beeckman, Zeger Hens, Tangi Aubert, Kristiaan Neyts
Tags
vertical cavity surface emitting laser
quantum dots
chiral liquid crystal
circularly polarized lasing
sensor technology
nanosecond-pulsed excitation
water stability
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