Coupling of a single photon source into photonic structures is highly demanded for implementation of numerous applications in quantum information processing and quantum dot (QD)-based solid-state platforms. In this work, we present a simple strategy for coupling a single semiconductor colloidal nanocrystal (NC) into polymer-based photonic structures. By utilizing low one-photon absorption (LOPA) direct laser writing (DLW) technique, we demonstrate the precise patterning of 2D SU-8 microstructures containing an individual core/shell CdSe/CdS NC. Various shapes of desired structures are fabricated with a single embedded NC while keeping its photon antibunching property as a single photon source. These results open a wide range of perspectives in term of quantum information, tunable emission, and efficient light harvesting by using polymer-based photonic crystal.
We have recently demonstrated a simple and low-cost fabrication technique, called low one-photon absorption direct laser writing, to realize desired polymeric microstructures. We present the use of this technique for fabrication of three-dimensional magnetophotonic devices on a photocurable homogeneous nanocomposite consisting of magnetite (Fe3O4) nanoparticles and a commercial SU8 photoresist. The fabricated magnetophotonic microstructures show strong response to an applied external magnetic field. Thus, various three-dimensional submicromechanical magnetophotonic devices, which can be mechanically driven by magnetic force, are designed and created. Potential applications of these devices are also discussed.
We have recently developed a simple fabrication technique, called low one-photon absorption (LOPA) direct laser writing (DLW), to realize multi-dimensional and multi-functional polymer-based photonic submicrostructures. This technique employs a continuous-wave laser at 532 nm-wavelength with only few milliwatts and a simple optical setup, allowing to decrease the cost of the fabrication system by a factor of ten as compared to a commercial DLW system. In this report, we present various photonic structures, such as 2D and 3D micro- resonators, photonic and magnetic submicrostructures, and nonlinear optical structures fabricated by this LOPA- based DLW method. We also discuss about potential applications of those fabricated multi-dimensional and multi-functional photonic submicrostructures in opto-electronics, bio, as well as in opto-mechanics.