All-passive upconversion of incoherent near-infrared light at intensities down to 10$^{-7}$ W/cm$^2$
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arXiv
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2024
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| author | Hamid, Rabeeya Feng, Demeng Narayanan, Pournima Edwards, Justin S. Hu, Manchen Belliveau, Emma Kim, Minjeong Deshpande, Sanket Wan, Chenghao Pucurimay, Linda Czaplewski, David A. Congreve, Daniel N. Kats, Mikhail A. |
| author_facet | Hamid, Rabeeya Feng, Demeng Narayanan, Pournima Edwards, Justin S. Hu, Manchen Belliveau, Emma Kim, Minjeong Deshpande, Sanket Wan, Chenghao Pucurimay, Linda Czaplewski, David A. Congreve, Daniel N. Kats, Mikhail A. |
| contents | Frequency upconversion, which converts low-energy photons into higher-energy ones, typically requires intense coherent illumination to drive nonlinear processes or the use of externally driven optoelectronic devices. Here, we demonstrate an upconversion system that converts low-intensity (down to ~10-7 W/cm$^2$) incoherent near-infrared (NIR) light into the visible, reaching intensities perceptible by the human eye, without the use of any external power input. Our upconverting element is enabled by the following ingredients: (1) photon upconversion via triplet-triplet annihilation in a bulk heterojunction of the organic semiconductors Y6 and rubrene; (2) plasmonic enhancement of absorption and field intensity in the heterojunction layer; (3) collection enhancement using a dichroic thin-film assembly. To enable high-resolution imaging, the upconverting element is inserted at an intermediate image plane of a dual-wavelength telescope system, which preserves the relative directionality of rays between the incident NIR light and output visible light. Our all-passive upconversion imaging system will enable NIR imaging and sensing in low-light environments under energy constraints. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_18707 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | All-passive upconversion of incoherent near-infrared light at intensities down to 10$^{-7}$ W/cm$^2$ Hamid, Rabeeya Feng, Demeng Narayanan, Pournima Edwards, Justin S. Hu, Manchen Belliveau, Emma Kim, Minjeong Deshpande, Sanket Wan, Chenghao Pucurimay, Linda Czaplewski, David A. Congreve, Daniel N. Kats, Mikhail A. Optics Mesoscale and Nanoscale Physics Materials Science Applied Physics Frequency upconversion, which converts low-energy photons into higher-energy ones, typically requires intense coherent illumination to drive nonlinear processes or the use of externally driven optoelectronic devices. Here, we demonstrate an upconversion system that converts low-intensity (down to ~10-7 W/cm$^2$) incoherent near-infrared (NIR) light into the visible, reaching intensities perceptible by the human eye, without the use of any external power input. Our upconverting element is enabled by the following ingredients: (1) photon upconversion via triplet-triplet annihilation in a bulk heterojunction of the organic semiconductors Y6 and rubrene; (2) plasmonic enhancement of absorption and field intensity in the heterojunction layer; (3) collection enhancement using a dichroic thin-film assembly. To enable high-resolution imaging, the upconverting element is inserted at an intermediate image plane of a dual-wavelength telescope system, which preserves the relative directionality of rays between the incident NIR light and output visible light. Our all-passive upconversion imaging system will enable NIR imaging and sensing in low-light environments under energy constraints. |
| title | All-passive upconversion of incoherent near-infrared light at intensities down to 10$^{-7}$ W/cm$^2$ |
| topic | Optics Mesoscale and Nanoscale Physics Materials Science Applied Physics |
| url | https://arxiv.org/abs/2411.18707 |