4 October 2022GaInP/AlGaInP nanolasers optimized for red-shifted excitation and two-photon pumping to sense from within living cells (Conference Presentation)
Vera Marie Titze, Soraya Caixeiro, Andrea Di Falco, Marcel Schubert, Malte C. Gather
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Biointegrated microlasers can act as highly localized sensors and report minute refractive index changes from within living cells. We previously reported non-obstructive and biointegrated whispering gallery mode nanolasers made from high-index semiconductor materials. Arsenide-free III/V alloys are attractive for this application due to minimal toxicity and high performance at visible wavelengths. Here, the band gaps of GaInP/AlGaInP quantum wells were engineered for absorption and emission at (far)-red wavelengths, allowing sub-pJ pumping at 642 nm and two-photon pumping with lasing thresholds around 80 pJ. This facilitates the wider integration of the nanolaser technology with popular fluorescence and multiphoton microscopy techniques.
Vera Marie Titze,Soraya Caixeiro,Andrea Di Falco,Marcel Schubert, andMalte C. Gather
"GaInP/AlGaInP nanolasers optimized for red-shifted excitation and two-photon pumping to sense from within living cells (Conference Presentation)", Proc. SPIE PC12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX, PC122020C (4 October 2022); https://doi.org/10.1117/12.2633153
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Vera Marie Titze, Soraya Caixeiro, Andrea Di Falco, Marcel Schubert, Malte C. Gather, "GaInP/AlGaInP nanolasers optimized for red-shifted excitation and two-photon pumping to sense from within living cells (Conference Presentation)," Proc. SPIE PC12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX, PC122020C (4 October 2022); https://doi.org/10.1117/12.2633153