高掺杂纳米晶体中从量子到经典偶极等离子体共振
From quantum to classical dipole plasmon resonances in highly-doped nano-crystals
摘要：
偶极等离子体激元共振在具有离域载流子的纳米颗粒中是普遍存在的。掺杂的半导体胶体纳米晶体构成了有限电子系统中等离子体激元激发的新范例，并提供了调整载流子密度的可能性，从而从可见光到红外线的偶极共振，这不能用金属簇来实现。限制自己高度n掺杂的ZnO纳米晶体，我们解释了所观察到的平稳过渡，从小尺寸为主的量子效应的大尺寸的共振达到其经典值。一个示意性的两个相互作用的高度简并能级量子模型，通过一个完整的随机相位近似计算验证，很好地产生实验观察到的趋势。
英文摘要：
Dipole plasmon resonances are ubiquitous in nano-particles with delocalized charge carriers. Doped semi-conductor colloidal nano-crystals constitute a novel paradigm for plasmon excitations in a finite electron system and offer the possibility to tune the carrier density and thus the dipole resonance from visible to infra-red, which cannot be achieved with metallic clusters. Restricting ourselves to highly n-doped ZnO nano-crystals, we explain the observed smooth transition from small sizes dominated by quantum effects to large sizes where the resonance reaches its classical value. A schematic two interacting highly degenerate level quantum model, validated by a full Random Phase Approximation calculation, yields nicely the experimentally observed trends.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
