EFFECT OF SURFACE DEAD-LAYER QUENCHING ON THE THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF NANOPARTICLES

Mualliflar

  • Koraboev Kamoliddin Abdushukurovich

    University of Geological Sciences

Калит сўзлар: hydrogen-like approximation, exciton energy, third-order nonlinear optical susceptibility, CdSe quantum dots, cascaded virtual transitions, surface dead layer, quantum confinement

Аннотация

To resolve the discrepancy between theory, which predicts a monotonic increase of the third-order nonlinear optical susceptibility (χ⁽³⁾) of CdSe quantum dots as the radius R decreases, and experiment, which shows sharp quenching below R < 2 nm, an analytical model combining the Boyd and Brus formalisms with a surface “dead-layer” correction is proposed. The model predicts a non-monotonic χ⁽³⁾(R) dependence and an optimal radius Ropt ≈ 2.5 nm at which the susceptibility is maximal. The computed values (10⁻²⁰ − 10⁻²² m²/V²) are in order-of-magnitude agreement with the CdSe/ZnS-MOF theoretical estimate and CdTe DFWM measurements, and are within two orders of magnitude of the single directly comparable Z-scan measurement on isolated colloidal CdSe quantum dots.

Фойдаланилган адабиётлар

1. Boyd R.W. Nonlinear Optics, 4th ed. - Cambridge: Academic Press, 2020. –P. 640.

2. Brus L.E. Electron–electron and electron–hole interactions in small semiconductor crystallites. // J. Chem. Phys. 1984. Vol. 80. - P. 4403–4409.

3. Miles R.B., Harris S.E. Optical third-harmonic generation in alkali metal vapors // IEEE J. Quantum Electron. 1973. Vol. 9. - P. 470–484.

4. Efros Al. L., Efros A.L. Interband absorption of light in a semiconductor sphere. // Sov. Phys. Semicond. 1982. Vol. 16. -P. 772–775.

5. Kulagin I.A. Third-order nonlinear optical response of quantum dots. // J. Mod. Opt. 2005. Vol. 52. - P. 2151-2160.

6. Kulagin I. A. Nonlinear optical properties of nanostructures. // Opt. Spectrosc. 2008. Vol. 105. - P. 448-454.

7. Norris D.J., Bawendi M.G. Measurement and assignment of the size-dependent optical spectrum in CdSe quantum dots. // Phys. Rev. B. 1996. Vol. 53. - P. 16338.

8. Jasieniak J. et al. Re-examination of the size-dependent absorption properties of CdSe quantum dots. // J. Phys. Chem. C. 2011. Vol. 115. - P. 20288–20294.

9. Deng Z., Jeong K.S. Guyot-Sionnest, P. Colloidal quantum dots intraband photodetectors. // ACS Nano. 2014. Vol. 8. - P. 11707–11714.

10. Guyot-Sionnest P. et al. Mid- and long-wave infrared optoelectronics via intraband transitions in PbS colloidal quantum dots. // Nano Lett.-2020. Vol. 20. - P. 7024-7031.

11. Zhang H., Peterson J.C. Guyot-Sionnest, P. Intraband transition of HgTe nanocrystals for long-wave infrared detection at 12 μm // ACS Nano. — 2023. -Vol. 17. — P. 7530–7538.

12. DeRose P.C., Zhang Y.Z., Gaigalas A.K. Optical properties of CdSe/ZnS nanocrystals. // J. Res. Natl. Inst. Stand. Technol. 2014. Vol. 119. Art. 026.

13. Geiregat P., Roda C., Tanghe I., Singh S., Di Giacomo A., Lebrun D., Grimaldi G., Maes J. Van Thourhout D., Moreels I., Houtepen A. J., Hens Z. Localization-limited exciton oscillator strength in colloidal CdSe nanoplatelets revealed by the optically induced Stark effect. // Light Sci. Appl. 2021. Vol. 10. Art. 112.

14. Wu, J. et al. Self-consistent theoretical framework for third-order nonlinear susceptibility in CdSe/ZnS-MOF quantum dot composites // Ann. Phys. - 2026. -Vol. 538. — Art. e00587.

15. Çadirci M., Gündoğdu Y., Elibol E., Kılıç H.Ş. Nonlinear optical properties of core shell type II quantum dot structures // Opt. Laser Technol. 2020. Vol. 128. Art. 106246.

16. Gündoğdu Y., Kılıç H.Ş., Çadırcı M. Third order nonlinear optical properties of CdTe/CdSe quasi type-II colloidal quantum dots. // Opt. Mater. 2021. Vol. 114. Art. 110956.

17. Wang X., Du Y., Ding S., Wang Q., Xiong G., Xie M., Shen X., Pang D. Preparation and third-order optical nonlinearity of self-assembled chitosan/CdSe-ZnS core-shell quantum dots multilayer films // J. Phys. Chem. B. 2006. Vol. 110. No. 4. -P. 1566-1570.

18. Seo J.T., Ma S.M., Yang Q., Creekmore L., Battle R., Brown H., Jackson A., Skyles T., Tabibi B., Yu W., Jung S., Namkung M. Large resonant third-order optical nonlinearity of CdSe nanocrystal quantum dots. // J. Phys.: Conf. Ser. 2006. Vol. 38. - P. 91–94.

19. Ultrafast third-order nonlinear dynamics in CdTe quantum dots at room temperature, degenerate four-wave mixing at 775 nm [author(s), journal, volume, and page numbers to be supplied by the author — full bibliographic record could not be confirmed and must be completed before submission].