Proc. SPIE 10712, doi: 10.1117/12.2319553

• “Novel non-plasmonic optical trapping: nano-structured semiconductor assisted (NASSCA) optical tweezers.”
• Yuki Uenobo, Tatsuya Shoji, Ayaka Mototsuji , Sawa Komoto, Tatsuya Nagai, Denver Linklater, Juodkazis Saulius, Yasuyuki Tsuboi

• Proc. SPIE
• DOI: 10.1117/12.2319553

We have studied plasmonic optical tweezers (POT) for nanomaterials such as DNA and polymers. These nanomaterials would be efficiently trapped by a plasmon-enhanced optical force. However, plasmon excitation also leads to a photothermal effect. Such heat generation has frequently hindered POT. Recently, we have developed a novel optical trapping technique; Nano-Structured Semi-Conductor-Assisted (NASSCA) optical tweezers. In NASSCA optical tweezers, we used a metal-free black silicon with a nanoneedles structure on the surface. NASSCA optical tweezers presents a useful and powerful manipulation technique without heat generation.