Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150588
Title: Optical microfluidic waveguides and solution lasers of colloidal semiconductor quantum wells
Authors: Maskoun, Joudi
Gheshlaghi, Negar
Isik, Furkan
Delikanli, Savas
Erdem, Onur
Erdem, Emine Yegan
Demir, Hilmi Volkan
Keywords: Science::Physics
Issue Date: 2021
Source: Maskoun, J., Gheshlaghi, N., Isik, F., Delikanli, S., Erdem, O., Erdem, E. Y. & Demir, H. V. (2021). Optical microfluidic waveguides and solution lasers of colloidal semiconductor quantum wells. Advanced Materials, 33(10), e2007131-. https://dx.doi.org/10.1002/adma.202007131
Journal: Advanced Materials 
Abstract: The realization of high-quality lasers in microfluidic devices is crucial for numerous applications, including biological and chemical sensors and flow cytometry, and the development of advanced lab-on-chip (LOC) devices. Herein, an ultralow-threshold microfluidic single-mode laser is proposed and demonstrated using an on-chip cavity. CdSe/CdS@Cdx Zn1-x S core/crown@gradient-alloyed shell colloidal semiconductor quantum wells (CQWs) dispersed in toluene are employed in the cavity created inside a poly(dimethylsiloxane) (PDMS) microfluidic device using SiO2 -protected Ag mirrors to achieve in-solution lasing. Lasing from such a microfluidic device having CQWs solution as a microfluidic gain medium is shown for the first time with a record-low optical gain threshold of 17.1 µJ cm- ² and lasing threshold of 68.4 µJ cm- ² among all solution-based lasing demonstrations. In addition, air-stable SiO2 protected Ag films are used and designed to form highly tunable and reflective mirrors required to attain a high-quality Fabry-Pérot cavity. These realized record-low thresholds emanate from the high-quality on-chip cavity together with the core/crown@gradient-alloyed shell CQWs having giant gain cross-section and slow Auger rates. This microfabricated CQW laser provides a compact and inexpensive coherent light source for microfluidics and integrated optics covering the visible spectral region.
URI: https://hdl.handle.net/10356/150588
ISSN: 1521-4095
DOI: 10.1002/adma.202007131
Rights: This is the peer reviewed version of the following article: Maskoun, J., Gheshlaghi, N., Isik, F., Delikanli, S., Erdem, O., Erdem, E. Y. & Demir, H. V. (2021). Optical microfluidic waveguides and solution lasers of colloidal semiconductor quantum wells. Advanced Materials, 33(10), e2007131-. https://dx.doi.org/10.1002/adma.202007131, which has been published in final form at https://doi.org/10.1002/adma.202007131. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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