| Autor: |
James Singh K; Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan., Ciou HH; Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan., Chang YH; Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan., Lin YS; Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan., Lin HT; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan., Tsai PC; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan., Lin SY; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan., Shih MH; Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan.; Department of Photonics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan., Kuo HC; Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.; Research Center for Applied Sciences (RCAS), Academia Sinica, Taipei 11529, Taiwan. |
| Abstrakt: |
Two-dimensional materials, such as transition metal dichalogenides (TMDs), are emerging materials for optoelectronic applications due to their exceptional light-matter interaction characteristics. At room temperature, the coupling of excitons in monolayer TMDs with light opens up promising possibilities for realistic electronics. Controlling light-matter interactions could open up new possibilities for a variety of applications, and it could become a primary focus for mainstream nanophotonics. In this paper, we show how coupling can be achieved between excitons in the tungsten diselenide (WSe 2 ) monolayer with band-edge resonance of one-dimensional (1-D) photonic crystal at room temperature. We achieved a Rabi splitting of 25.0 meV for the coupled system, indicating that the excitons in WSe 2 and photons in 1-D photonic crystal were coupled successfully. In addition to this, controlling circularly polarized (CP) states of light is also important for the development of various applications in displays, quantum communications, polarization-tunable photon source, etc. TMDs are excellent chiroptical materials for CP photon emitters because of their intrinsic circular polarized light emissions. In this paper, we also demonstrate that integration between the TMDs and photonic crystal could help to manipulate the circular dichroism and hence the CP light emissions by enhancing the light-mater interaction. The degree of polarization of WSe 2 was significantly enhanced through the coupling between excitons in WSe 2 and the PhC resonant cavity mode. This coupled system could be used as a platform for manipulating polarized light states, which might be useful in optical information technology, chip-scale biosensing and various opto-valleytronic devices based on 2-D materials. |
