Single optical tweezers based on elliptical core fiber

• We propose and demonstrate a novel elliptical core single fiber tweezers.
• The LP11 mode can propagate stably. Thus when we stretch or twist the elliptical core fiber, the pattern distribution of the LP11 mode will not change obviously.
• This property provides an advantage to rotate the yeast cells just by twisting the fiber.
• This new elliptical core fiber tweezers has the characteristic of simple and low cost, which is feasible to be used in practical fields conveniently.

We propose and demonstrate a new single optical tweezers based on an elliptical core fiber, which can realize the trapped yeast cell rotation with a precise and simple control. Due to the elliptical shape of the fiber core, the LP11 mode beam can propagate stably. When we rotate the fiber tip, the LP11 mode beam will also rotate along with the fiber tip, which helps to realize the trapped micro-particle rotation. By using this method, we can easily realize the rotation of the trapped yeast cells, the rotating angle of the yeast cell is same as the elliptical core fiber tip.