Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 40: Optomechanics and Photonics
Q 40.2: Poster
Mittwoch, 16. März 2022, 16:30–18:30, P
Dry & clean loading of nanoparticles in vacuum — •Ayub Khodaee1,2, Kahan Dare1, Aisling Johnson1, Uros Delic1, and Markus Aspelmeyer1,2 — 1University of Vienna, Boltzmanngasse 5, 1090 Wien, Vienna, Austria — 2IQOQI - Vienna, Boltzmanngasse 3, 1090 Wien, Vienna, Austria
Expanding the optomechanical experiments with nanoparticles to ultrahigh vacuum is required in order to isolate the nanoparticle from the environment sufficiently well to realize macroscopic quantum states, e.g. a superposition. One of the most commonly used loading mechanisms is spraying water/alcohol diluted particles into the chamber using a nebulizer. The drawback of this method is contaminating the whole chamber with liquid, making high and ultrahigh vacuum out of reach. On the other hand, laser-induced acoustic desorption (LIAD) has been successful in loading dry nanoparticles into a trapping potential; however, the method requires expensive components to achieve dry loading. Recently, loading of microparticles using piezoelectric shaking has been demonstrated, thus providing a simple method for launching dry particles. However, launching nanoparticles has remained a challenge due to the strong binding forces between the deposited particles and the launching pad. Here, we will present successful launching of nanoparticles with piezoelectric shaking. We report loading a silica nanoparticle with diameter as small as 143 nm directly into an optical tweezer at high pressure. Finally, we discuss the limits of the launching method and propose a way to load the particles directly into an optical trap in high vacuum.