## 1 Introduction  
Since xenon atoms were successfully positioned and assembled with atomic precision [1], nano-manipulation technology, as a kind of \"bottom-up\" tool, has attracted wide attention in the fields of nano-measurement, nano-fabrication, nano-optics, nano-robot, and so on [2, 3, 4, 5]. Among various nano-manipulation methods, the most widespread is probe manipulation based on high-resolution microscopes, including atomic force microscope (AFM), scanning tunneling microscope (STM), scanning electron microscope (SEM), and transmission electron microscope (TEM) [6, 7, 8, 9]. With images feedback of targets, these systems use probes, which are carried by manipulators with nanoscale resolution of movement, as end-effectors to push, pick, stretch, place, and bend nanomaterials. The manipulation mechanism of this method is mainly based on the control of mechanical forces (e.g., contact force, Van der Waals force, friction) between probes, objects, and substrates [10, 11]. So, due to the convenience of locating and imaging, this method exhibits outstanding manipulation capacity, and enormous potential in the application of nanomaterials, like tuning electrical and optical properties, constructing nanostructure, and even fabricating nano-devices. For instance, nanoparticles (NPs) and nanowires (NWs)can be stacked together by a tweezer which consists of two individually actuated probes in AFM or SEM [12; 13]. Two-dimensional materials were folded and unfolded precisely by the STM-based manipulation system to improve electrical and quantum properties [14]. The AFM-based manipulation also has the capacity to assemble and weld gold nanowires for fabricating nano-circuits [15]. However, the most of manipulation methods mentioned above are always performed by direct contact between nanomaterials and probes, so that the damage of both is inevitable during processing. In addition, it also limits the ability of manipulating small objects due to the size of contact tips. Hence, the further exploration of non-contact manipulation benefits from the development of state-of-the-art methods and systems. Optical tweezers, presented by [PERSON], represent a revolutionary tool for manipulating nanomaterials due to non-contact optical trapping, with or without less damage [16]. It has also proven useful not only for trapping and spinning nanomaterials and cells, but also for significant applications in nano-devices so far [17; 18; 19; 20]. To manipulate much smaller NPs, near-field (also named as evanescent field) optical tweezers, which are beyond the optical diffraction limit, provide a novel high-resolution scheme. However, the capacity of this is also restricted by the small optical forces induced by weak evanescent fields. Hence, variety enhancement solutions have been proposed sequentially. For example, [PERSON] presented a kind of silicon photonic crystal resonators to trap dielectric NPs ranging in size from 50 to 500 nm. This method provided a several-orders-of-magnitude stronger force and an order of magnitude stiffer than other conventional near-field tweezers [21]. [PERSON] successfully fabricated plasmonic dipole antennas to enhance near-field, which were capable of trapping 10 nm metal NPs [22]. Similarly, [PERSON] also built optical traps, based on a structure of double nano-hole, with high stiffness when manipulating 20 nm polystyrene NPs [23]. Although these solutions have proven their excellent ability for steady trapping, the targeted and flexible manipulation of small objects is still limited by the fixed enhancement structures and corresponding laser source. The limitation creates a high barrier of application. Hence, optical manipulation using mobile probes, like fiber probes, scanning near-field optical microscope (SNOM) probes, AFM probes, and even customized probes, has appeared to break through the bottleneck. [PERSON] proved that nanometer scale particles could be trapped using a SNOM probe by calculations [24].