Chiral Hybrid Copper(I) Halides for High Efficiency Second Harmonic Generation with a Broadband Transparency Window

Abstract

Chiral hybrid organic–inorganic metal halides (HOMHs) with intrinsic noncentrosymmetry have shown great promise for applications in second‐order nonlinear optics (NLO). However, established chiral HOMHs often suffer from their relatively small band gaps, which lead to negative impacts on transparent window and laser‐induced damage thresholds (LDT). Here, we have synthesized two chiral HOMHs based on CuI halides, namely (R‐/S‐MBA)CuBr2, which feature well‐balanced NLO performances with a highly efficient SHG response, outstanding optical transparency, and high LDT. The effective second‐order NLO coefficient of (R‐MBA)CuBr2 has been determined to be ≈24.7 pm V−1, which is two orders of magnitude higher than that of their CuII counterparts. This work shows the promising potential of CuI‐based chiral HOMHs for nonlinear photonic applications in wide wavelength regions.

Tunable and Large Magneto‐Photoluminescence for Single‐Crystalline Chiral Perovskites

“…Nevertheless, the chiral perovskites with a variety of metal compositions such as lead (Pb), cadmium (Cd), and tin (Sn) are proven to be excellent candidates for chiroptical spintronics, nonlinear optics, photodetectors, ferroelectricity, ferroelastic switches, and spin-polarized electronic transport since they exhibit the so-called chirality-induced spin selectivity (CISS). [15][16][17][18][19][20][21][22][23][24][25][26][27] Such effect stems from the chiral induced spin orbit coupling (SOC). [28,29] Depending on the material chirality, only one channel of the spin angular momenta either spinup (↑) or spin-down (↓) can be well preserved for the selectively optical excitation and electronic/spin transport.…”

Structural Asymmetry and Chiroptical Activity of Chiral Antimony‐Halide Hybrids

“…[9][10][11][12][13] The incorporated chiral organics also result in noncentrosymmetric space groups, giving rise to new functionalities including ferroelectricity, non-linear optic (NLO) and Rashba/Dresselhaus splitting. [14][15][16][17][18][19][20] Additionally, electron transport through these chiral hybrid semiconductors is shown to be highly spin-dependent, [21][22][23] making them promising candidates for spintronic applications.…”

“…For instance, chiral hybrid materials can be used to generate and detect circularly polarized light with tunable wavelength, thereby providing new opportunities for chiroptic and chiroptoelectronic applications [9–13] . The incorporated chiral organics also result in noncentrosymmetric space groups, giving rise to new functionalities including ferroelectricity, non‐linear optic (NLO) and Rashba/Dresselhaus splitting [14–20] . Additionally, electron transport through these chiral hybrid semiconductors is shown to be highly spin‐dependent, [21–23] making them promising candidates for spintronic applications.…”

Strong In‐Plane Anisotropy and Giant Second Harmonic Generation Response of Organic Single‐Crystalline Microwire Arrays

“…Despite this, their nonlinear coefficient is still larger than some commercial NLO crystals, such as BBO ( d 22 = 2.3 pm V −1 ), LBO ( d 31 = 1.05 pm V −1 ), KDP ( d 36 = 0.39 pm V −1 ), and LiNbO 3 ( d 32 = −5.7 pm V −1 ). [ 34,45,46 ] Combining the large second‐order nonlinear coefficients of the OH1 and DAT2 microwires and the wide transmittance in the infrared region, they may have greater application potential in infrared frequency conversion. [ 47 ]…”

“…To further evaluate the NLO performance of OH1 and DAT2 microwires, we calculated their second-order nonlinear susceptibility d il according to the following formula: ). [34,45,46] Combining the large second-order nonlinear coefficients of the OH1 and DAT2 microwires and the wide transmittance in the infrared region, they may have greater application potential in infrared frequency conversion. [47]…”