Universität zu Köln

Titze, Vera M., Caixeiro, Soraya ORCID: 0000-0003-4605-957X, Di Falco, Andrea ORCID: 0000-0002-7338-8785, Schubert, Marcel ORCID: 0000-0002-8739-4852 and Gather, Malte C. (2022). Red-Shifted Excitation and Two-Photon Pumping of Biointegrated GaInP/AlGaInP Quantum Well Microlasers. ACS Photonics, 9 (3). S. 952 - 961. WASHINGTON: AMER CHEMICAL SOC. ISSN 2330-4022

Full text not available from this repository.

Abstract

Biointegrated intracellular microlasers have emerged as an attractive and versatile tool in biophotonics. Different inorganic semiconductor materials have been used for the fabrication of such biocompatible microlasers but often operate at visible wavelengths ill-suited for imaging through tissue. Here, we report on whispering gallery mode microdisk lasers made from a range of GaInP/AlGaInP multi-quantum well structures with compositions tailored to red-shifted excitation and emission. The selected semiconductor alloys show minimal toxicity and allow the fabrication of lasers with stable single-mode emission in the NIR (675-720 nm) and sub-pJ thresholds. The microlasers operate in the first therapeutic window under direct excitation by a conventional diode laser and can also be pumped in the second therapeutic window using two-photon excitation at pulse energies compatible with standard multiphoton microscopy. Stable performance is observed under cell culturing conditions for 5 days without any device encapsulation. With their bio-optimized spectral characteristics, low lasing threshold, and compatibility with two-photon pumping, AlGaInP-based microlasers are ideally suited for novel cell tagging and in vivo sensing applications.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Titze, Vera M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Caixeiro, Soraya UNSPECIFIED orcid.org/0000-0003-4605-957X UNSPECIFIED Di Falco, Andrea UNSPECIFIED orcid.org/0000-0002-7338-8785 UNSPECIFIED Schubert, Marcel UNSPECIFIED orcid.org/0000-0002-8739-4852 UNSPECIFIED Gather, Malte C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-664878
DOI:	10.1021/acsphotonics.1c01807
Journal or Publication Title:	ACS Photonics
Volume:	9
Number:	3
Page Range:	S. 952 - 961
Date:	2022
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	2330-4022
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LASER; GAINP Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Optics; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66487