Journal
PHYSICA B-CONDENSED MATTER
Volume 624, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physb.2021.413424
Keywords
Metal nanoparticles; Morse quantum wells; Optical absorption coefficients; Refractive index changes
Categories
Funding
- National Natural Science Foundation of China [61775043, 11947052]
- Guangdong Province University Youth Innovative Talents Program of China [2019KQNCX070]
- Natural Science Foundation of Guangdong [2021A1515010050]
- Guangdong Polytechnic Normal University Talent Introduction Project Foundation of China [XY2019022]
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By investigating the interaction between a Morse quantum well and a quantum-sized metal nanoparticle, we found that exciton-plasmon coupling leads to changes in the optical properties of the Morse quantum well, reducing the magnitudes of its optical absorption coefficients and refractive index changes.
We investigate linear and nonlinear optical absorption coefficients (OACs) and refractive index changes(RICs) of a Morse quantum well when a quantum-sized metal nanoparticle is placed nearby. The exciton-plasmon coupling induces the modification of the energy interval and the relaxation rate of the Morse quantum well. The spontaneous decay rate of the Morse quantum well is also modified due to Purcell effect. These modification above reduce the magnitudes of the linear and nonlinear OACs and RICs of the Morse quantum well. More colorful results are demonstrated by controlling the size of the metal nanoparticle and the distance between the Morse quantum well and the metal nanoparticle. Our findings provide a way for manipulating the linear and nonlinear optical properties of the Morse quantum well.
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