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Efficient translation of nanoparticles using optical tweezers (OT) is critical in OT-based methods such as micro- and nano-assembly. We investigate the limits of OT nanoparticle manipulation, achieving record lateral translation speeds of ~ 0.17 mm/s.

Plasmonically enhanced microcavities exhibit local field enhancement but decreased quality (Q) factor compared to bare microcavities. We show that trimer gold nanostructures generate dark modes that greatly increase field enhancement and maintain Q.

Lens-free holographic microscopy offers sub-micron resolution over a field-of-view >20 mm2, making it a suitable biomedical imaging and sensing platform. We devised a sparsity-promoting method, which enhances SNR by ∼ 8 dB compared to traditional methods.