Alignment-free ultra-broadband parametric frequency conversion in lead-halide perovskites
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arXiv
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| Format: | Preprint |
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2026
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| author | Kumar, Abhishek Shiva Lorenc, Dusan Zhumekenov, Ayan A. Bakr, Osman M. Alpichshev, Zhanybek |
| author_facet | Kumar, Abhishek Shiva Lorenc, Dusan Zhumekenov, Ayan A. Bakr, Osman M. Alpichshev, Zhanybek |
| contents | Lead-halide perovskites were demonstrated to exhibit some of the largest known optical nonlinearities, yet their potential for frequency conversion remains largely untapped. Here we demonstrate ultra-broadband four-wave mixing of near- and mid-infrared femtosecond pulses in thick single-crystal LHPs, generating bright, coherent, and highly collimated emission across an exceptionally wide continuous tuning range without phase-matching engineering, angular alignment, or dispersion optimization. Time resolved measurements reveal that the emission originates near the crystal surfaces, where phase-matching constraints are relaxed, while the unusually large intrinsic $χ^{(3)}$ response preserves efficient and directional frequency conversion despite the strongly localized interaction volume. These results position LHPs as a powerful bulk platform for ultra-broadband nonlinear photonics, opening a pathway toward compact, alignment-free architectures for ultrafast frequency conversion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_25718 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Alignment-free ultra-broadband parametric frequency conversion in lead-halide perovskites Kumar, Abhishek Shiva Lorenc, Dusan Zhumekenov, Ayan A. Bakr, Osman M. Alpichshev, Zhanybek Materials Science Applied Physics Optics Lead-halide perovskites were demonstrated to exhibit some of the largest known optical nonlinearities, yet their potential for frequency conversion remains largely untapped. Here we demonstrate ultra-broadband four-wave mixing of near- and mid-infrared femtosecond pulses in thick single-crystal LHPs, generating bright, coherent, and highly collimated emission across an exceptionally wide continuous tuning range without phase-matching engineering, angular alignment, or dispersion optimization. Time resolved measurements reveal that the emission originates near the crystal surfaces, where phase-matching constraints are relaxed, while the unusually large intrinsic $χ^{(3)}$ response preserves efficient and directional frequency conversion despite the strongly localized interaction volume. These results position LHPs as a powerful bulk platform for ultra-broadband nonlinear photonics, opening a pathway toward compact, alignment-free architectures for ultrafast frequency conversion. |
| title | Alignment-free ultra-broadband parametric frequency conversion in lead-halide perovskites |
| topic | Materials Science Applied Physics Optics |
| url | https://arxiv.org/abs/2605.25718 |