State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
Haohai Yu (haohaiyu@sdu.edu.cn)
Huaijin Zhang (huaijinzhang@sdu.edu.cn)
纸质出版日期:2020,
网络出版日期:2020-03-18,
收稿日期:2019-12-25,
修回日期:2020-02-28,
录用日期:2020-03-03
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Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration[J]. LSA, 2020,9(2):236-243.
Shao, M. C. et al. Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration. Light: Science & Applications, 9, 236-243 (2020).
Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration[J]. LSA, 2020,9(2):236-243. DOI: 10.1038/s41377-020-0281-4.
Shao, M. C. et al. Pushing periodic-disorder-induced phase matching into the deep-ultraviolet spectral region: theory and demonstration. Light: Science & Applications, 9, 236-243 (2020). DOI: 10.1038/s41377-020-0281-4.
Nonlinear frequency conversion is a ubiquitous technique that is used to obtain broad-range lasers and supercontinuum coherent sources. The phase-matching condition (momentum conservation relation) is the key criterion but a challenging bottleneck in highly efficient conversion. Birefringent phase matching (BPM) and quasi-phase matching (QPM) are two feasible routes but are strongly limited in natural anisotropic crystals or ferroelectric crystals. Therefore
it is in urgent demand for a general technique that can compensate for the phase mismatching in universal nonlinear materials and in broad wavelength ranges. Here
an additional periodic phase (APP) from order/disorder alignment is proposed to meet the phase-matching condition in arbitrary nonlinear crystals and demonstrated from the visible region to the deep-ultraviolet region (e.g.
LiNbO
3
and quartz). Remarkably
pioneering 177.3-nm coherent output is first obtained in commercial quartz crystal with an unprecedented conversion efficiency above 1‰. This study not only opens a new roadmap to resuscitate those long-neglected nonlinear optical crystals for wavelength extension
but also may revolutionize next-generation nonlinear photonics and their further applications.
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