{"title":"Flying on a rainbow with a diffractive solar sail (Conference Presentation)","authors":"Grover A. Swartzlander","doi":"10.1117/12.2531538","DOIUrl":"https://doi.org/10.1117/12.2531538","url":null,"abstract":"","PeriodicalId":420156,"journal":{"name":"Optical Trapping and Optical Micromanipulation XVI","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122464588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Spinning, scanning, and other fun tricks with optically levitated microspheres (Conference Presentation)","authors":"G. Gratta","doi":"10.1117/12.2531730","DOIUrl":"https://doi.org/10.1117/12.2531730","url":null,"abstract":"","PeriodicalId":420156,"journal":{"name":"Optical Trapping and Optical Micromanipulation XVI","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129446135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Germanium nanospheres as high precision optical tweezers probes (Conference Presentation)","authors":"E. Schaeffer, S. Sudhakar","doi":"10.1117/12.2530102","DOIUrl":"https://doi.org/10.1117/12.2530102","url":null,"abstract":"Force spectroscopy on single molecular machines is often performed using optical tweezers. However, the use of common microspheres composed of silica or polystyrene may have limitations in the maximum force, measurement precision, or the degrees of freedom that can be measured. For example, the ultimate precision of the experiment is limited by the drag coefficient, i.e. the size of the microsphere. Thus, ideally, microspheres should be as small as possible. However, if microspheres are too small, maximum trapping forces are smaller than biological motor-generated forces creating a lower practical size limit of about 200 nm for polystyrene. Here, we have developed germanium nanospheres with diameters ranging from 30--200 nm. With a high refractive index of 4.4, their trapping efficiency is more than 10-fold improved compared to silica. Using 70-nm-diameter germanium nanospheres, we measured the stepping behavior of the molecular motor kinesin-1. With an improved precision, we could measure intermediate steps. In the long-term, the development of novel probes enables novel applications.","PeriodicalId":420156,"journal":{"name":"Optical Trapping and Optical Micromanipulation XVI","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133723947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optical forces from Rayleigh to Mie regime: theory and experiment (Conference Presentation)","authors":"A. Neves, A. Fontes, W. L. Moreira, C. César","doi":"10.1117/12.2530011","DOIUrl":"https://doi.org/10.1117/12.2530011","url":null,"abstract":"","PeriodicalId":420156,"journal":{"name":"Optical Trapping and Optical Micromanipulation XVI","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121778818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Volpe, L. Pérez-García, A. Arzola, J. Pérez, G. Volpe
{"title":"FORMA: a high-performance algorithm for the calibration of optical tweezers (Conference Presentation)","authors":"G. Volpe, L. Pérez-García, A. Arzola, J. Pérez, G. Volpe","doi":"10.1117/12.2530626","DOIUrl":"https://doi.org/10.1117/12.2530626","url":null,"abstract":"","PeriodicalId":420156,"journal":{"name":"Optical Trapping and Optical Micromanipulation XVI","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123396104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Ashida, J. Naoi, M. Takamune, Y. Takahashi, S. Sasaki, M. Kumakura, Y. Moriwaki
{"title":"Optical manipulation of magnetically trapped superconducting micro particles in superfluid helium (Conference Presentation)","authors":"M. Ashida, J. Naoi, M. Takamune, Y. Takahashi, S. Sasaki, M. Kumakura, Y. Moriwaki","doi":"10.1117/12.2529166","DOIUrl":"https://doi.org/10.1117/12.2529166","url":null,"abstract":"Laser ablation in superfluid helium, having extremely low temperature, negligibly small viscosity, huge thermal conductivity, and high transparency in visible region, provides us a unique opportunity to fabricate novel microstructures and control their motion. We have successfully fabricated nano and micro spheres of semiconductors by the laser ablation in the superfluid helium with a nanosecond Nd:YAG laser. [Scientific Reports 4, 5186 (2014).] Recently, we applied this method to metals, such as indium and rhenium, which show superconductivity at low temperature. To select superconducting particles, we utilized perfect diamagnetism caused by Meissner effect, designing a magnetic trap with two permanent magnets for the superconducting particles. Thus we fabricated and trapped a single or several superconducting particles after the laser ablation in the superfluid helium [Applied Physics Express 10, 022701(2017).] Here we successfully control the positions of the magnetically trapped superconducting particles, by irradiating a laser to them. The particles were pushed away from their original trapped positions and after the irradiation released from the displaced positions, moving along the force of the trapping potential and the viscosity force of the superfluid helium. By tracking the particles motion we can deduce physical properties of the superfluid helium and trapped particles. Thus the optical fabrication and manipulation of the superconducting micro particles provide us a unique opportunity to investigate superfluidity and superconductivity.","PeriodicalId":420156,"journal":{"name":"Optical Trapping and Optical Micromanipulation XVI","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126163393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}