Few photons probe third-order nonlinear properties of nanomaterials in a plasmonic nanocavity
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909377150058496 |
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| author | Kumari, Anupa Aghdaee, MohammadReza Van de Voorde, Mathis Ojambati, Oluwafemi S. |
| author_facet | Kumari, Anupa Aghdaee, MohammadReza Van de Voorde, Mathis Ojambati, Oluwafemi S. |
| contents | Quantification of nonlinear optical properties is required for nano-optical devices, but they are challenging to measure on a nanomaterial. Here, we harness enhanced optical fields inside a plasmonic nanocavity to mediate efficient nonlinear interactions with the nanomaterials. We performed reflection Z-scan technique at intensity levels of kWcm^2, reaching down to two photons per pulse, in contrast to GWcm^2 in conventional methods. The few photons are sufficient to extract the nonlinear refractive index and nonlinear absorption coefficient of different nanomaterials, including perovskite and Au nano-objects and a molecular monolayer. This work is of great interest for investigating nonlinear optical interactions on the nanoscale and characterizing nanomaterials, including fragile biomolecules. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_02315 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Few photons probe third-order nonlinear properties of nanomaterials in a plasmonic nanocavity Kumari, Anupa Aghdaee, MohammadReza Van de Voorde, Mathis Ojambati, Oluwafemi S. Optics Quantification of nonlinear optical properties is required for nano-optical devices, but they are challenging to measure on a nanomaterial. Here, we harness enhanced optical fields inside a plasmonic nanocavity to mediate efficient nonlinear interactions with the nanomaterials. We performed reflection Z-scan technique at intensity levels of kWcm^2, reaching down to two photons per pulse, in contrast to GWcm^2 in conventional methods. The few photons are sufficient to extract the nonlinear refractive index and nonlinear absorption coefficient of different nanomaterials, including perovskite and Au nano-objects and a molecular monolayer. This work is of great interest for investigating nonlinear optical interactions on the nanoscale and characterizing nanomaterials, including fragile biomolecules. |
| title | Few photons probe third-order nonlinear properties of nanomaterials in a plasmonic nanocavity |
| topic | Optics |
| url | https://arxiv.org/abs/2411.02315 |