Broadband and ultrafast all-optical switching based on transition metal carbide
Wang Cong,
Gao Lingfeng,
Chen Hualong,
Xu Yiquan,
Ma Chunyang,
Yao Haizi,
Song Yufeng,
Zhang Han
Affiliations
Wang Cong
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Gao Lingfeng
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Chen Hualong
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Xu Yiquan
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Ma Chunyang
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Yao Haizi
Henan Key Laboratory of Smart Lighting, Huanghuai University, Zhumadian, China
Song Yufeng
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Zhang Han
International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Collaborative Innovation Center for Optoelectronic Science & Technology, Shenzhen University, Shenzhen, 518060, China
Ultrafast all-optical switches have attracted considerable attention for breaking through the speed limitation of electric devices. However, ultrafast and high-efficiency all-optical switches based on two-dimensional (2D) materials can be achieved due to their strong nonlinear optical response and ultrafast carrier dynamic. For this reason, we propose the pump-probe method to achieve an ultrafast optical switcher with a response time of 192 fs and a switching energy of 800 nJ by using transition metal carbide (Nb2C). The response time and switching energy are far smaller than that of the all-optical device based on the saturable absorption effect of 2D materials. It is believed that the Nb2C-based all-optical switch provides a novel idea to achieve a high-performance all-optical device and has the potential for application in high-speed photonics processing.
