2018 Impact factor 2.612

EPJ AP Highlight - Emergent gain materials for active photonics

Example of an optical waveguide containing colloidal quantum dots. When the nanostructures are optically pumped the waveguide propagates and confines the photoluminescence. Above a certain threshold light is amplified.

Nowadays semiconductor nanostructures developed by colloidal methods have emerged as an alternative to the classical III-V semiconductors and rare earth technologies to provide active functionalities in photonic devices. Their outstanding optical properties include high absorption cross section, high quantum yield of emission at room temperature, or the capability of tuning the band-gap with the size/base material. As a consequence, these materials have been successfully applied in several fields, such as photodetection, amplification, generation of light or sensing. For these purposes their solution process nature provides a cheap fabrication, and an easy incorporation on a broad range of substrates and photonic structures. This review summarizes the great effort undertaken by the scientific community to construct active photonic devices based on semiconductors fabricated by chemical methods. The works compares the performances demonstrated by semiconductor nanocrystals (colloidal quantum dots, quantum rods and quantum wells) with those provided by organometal halide perovskites, and describes their appropriate integration into photonic architectures (waveguides and cavities) to achieve stimulated emission.

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites, Isaac Suárez Álvarez (2016), Eur. Phys. J. Appl. Phys., 75: 30001, DOI 10.1051/epjap/2016160151

Editor-in-Chief
Paolo Biscari
The authors acknowledge the two anonymous reviewers for the constructive comments and suggestions which have helped to improve the manuscript significantly and thank the journal for the kind collaboration.

Sandra Morelli, Università di Modena, Italy

ISSN: 2190-5444 (Electronic Edition)

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