Wavelength-tunable colloidal quantum dot laser on ultra-thin flexible glass

Foucher, C. and Guilhabert, B. and Laurand, N. and Dawson, M. D. (2014) Wavelength-tunable colloidal quantum dot laser on ultra-thin flexible glass. Applied Physics Letters, 104 (14). 141108. ISSN 0003-6951

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    Abstract

    A mechanically flexible and wavelength-tunable laser with an ultra-thin glass membrane as substrate is demonstrated. The optically pumped hybrid device has a distributed feedback cavity that combines a colloidal quantum dot gain film with a grating-patterned polymeric underlayer, all on a 30-μm thick glass sheet. The total thickness of the structure is only 75 μm. The hybrid laser has an average threshold fluence of 450 ± 80 μJ/cm2 (for 5-ns excitation pulses) at an emitting wavelength of 607 nm. Mechanically bending the thin-glass substrate enables continuous tuning of the laser emission wavelength over an 18-nm range, from 600 nm to 618 nm. The correlation between the wavelength tunability and the mechanical properties of the thin laser structure is verified theoretically and experimentally.

    ORCID iDs

    Foucher, C. ORCID logoORCID: https://orcid.org/0000-0002-3229-7502, Guilhabert, B. ORCID logoORCID: https://orcid.org/0000-0002-3986-8566, Laurand, N. ORCID logoORCID: https://orcid.org/0000-0003-0486-4300 and Dawson, M. D. ORCID logoORCID: https://orcid.org/0000-0002-6639-2989;