2015/06/26 by Jen-Feng Hsu, Jen‐Feng Hsu, Peng Ji +8
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Laser-induced spectroscopy and plasma #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Optics (physics.optics) #Quantum optics and atomic interactions #cond-mat.mes-hall #physics.optics
paper · pdf · doi:10.48550/arxiv.1506.08215
6 pages and 8 figures
arxiv created 2015/06/26 · openalex publication_date 2015/06/26 · arxiv updated 2015/06/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present a simple and effective method of loading particles into an optical trap in air at atmospheric pressure. Material which is highly absorptive at the trapping laser wavelength, such as tartrazine dye, is used as media to attach photoluminescent diamond nanocrystals. The mix is burnt into a cloud of air-borne particles as the material is swept near the trapping laser focus on a glass slide. Particles are then trapped with the laser used for burning or transferred to a second laser trap at a different wavelength. Evidence of successfully loading diamond nanocrystals into the trap presented includes high sensitivity of the photoluminecscence (PL) to an excitation laser at 520~nm wavelength and the PL spectra of the optically trapped particles. This method provides a convenient technique for the study of the nitrogen-vacancy (NV) centers contained in optically trapped diamond nanocrystals.