GaInP/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

doi:10.1117/12.2633153

4 October 2022 GaInP/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

Author Affiliations +

Proceedings Volume PC12202, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XIX; PC122020C (2022) https://doi.org/10.1117/12.2633153
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

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.

Conference Presentation

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Vera Marie Titze, Soraya Caixeiro, Andrea Di Falco, Marcel Schubert, and 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

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KEYWORDS

Photonics

Quantum wells

Tissue optics

Microscopy

Semiconductor lasers

Semiconductor materials

Semiconductors

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