Nonlinear plasmon-exciton infrared photodetector operating in the two-photon absorption mode

Pavel Samokhvalov; Dayana Gulevich; Victor Krivenkov; Ivan S. Vasil'evskii; Nikolai I. Kargin; Igor Nabiev

doi:10.1117/12.2607466

5 March 2022 Nonlinear plasmon-exciton infrared photodetector operating in the two-photon absorption mode

Pavel Samokhvalov, Dayana Gulevich, Victor Krivenkov, Ivan S. Vasil'evskii, Nikolai I. Kargin, Igor Nabiev

Proceedings Volume 12009, Quantum Sensing and Nano Electronics and Photonics XVIII; 120090N (2022) https://doi.org/10.1117/12.2607466
Event: SPIE OPTO, 2022, San Francisco, California, United States

Conference Poster

Abstract

Semiconductor quantum dots (QDs) are known for their high capacity to nonlinear interaction with light via two-photon absorption (TPA). This allows them to absorb efficiently the infrared photons with energies lower than the bandgap energy. In addition, the TPA can be further enhanced due to interaction of QD excitons with plasmons of metal nanoparticles making it possible to design highly efficient optoelectronic devices with a nonlinear response to irradiation. To achieve this goal, we have fabricated the nonlinear photodetectors based on the QDs and silver nanoplates (SNPs) which combine both mentioned effects and demonstrate a highly efficient nonlinear photocurrent response at the excitation in the nearinfrared region of optical spectrum. In this study, we compared the photodetectors efficiency enhancement in hybrid devices based on the CdSe QDs and SNPs designed by the different ways. In one case, the SNPs were deposited on the top of 10 layers of QDs, and in the other, they were placed between these layers. We have demonstrated that both types of hybrid photodetectors operate in the two-photon regime. At the same time, we have found that the two-photon absorption efficiency was significantly higher in the sample where the SNPs were located between the QD-layers.

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Pavel Samokhvalov, Dayana Gulevich, Victor Krivenkov, Ivan S. Vasil'evskii, Nikolai I. Kargin, and Igor Nabiev "Nonlinear plasmon-exciton infrared photodetector operating in the two-photon absorption mode", Proc. SPIE 12009, Quantum Sensing and Nano Electronics and Photonics XVIII, 120090N (5 March 2022); https://doi.org/10.1117/12.2607466

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