Links
Contact
Address：
Harbin Institute of Technology (Shenzhen), Information Building, L1304
Tel：
86-755-26400780
Mail：xuxiaochuan@hit.edu.cn
Postalcode：518055
Rescent Semnars
Title：
基于氧化物半导体器件的逻辑与储存单片三维集成
Speakers：
Mengwei Si, associate professor，Shanghai Jiao Tong University
Time：
2023-03-22 10:00-11:00
Location：T5406
RESEARCH
We are developing highly sensitive on-chip photonic sensors for bio- and electromagnetic field sensing. We are continuously pushing the limit of the sensitivity by exploring novel photonic structures and materials. Leveraging slow light and slot waveguide, we have demonstrated an electromagnetic field sensors with 1.5 V/m sensitivity and remarkable bandwidth (left figure), which has been receiving intensive attention. Our recent demonstration of biosensors subwavelength metamaterials showed 0.1 ng/ml sensitivity, which can be used in disease screening, point-of-care applications, etc.
On-Chip Photonic Sensors
Journal of Lightwave Technology 36, 1568-1575 (2018)
Highly Efficient Optoelectronic Devices
As the internet traffic continues to grow radically, the total power consumption for information processing, transportation, and storage will soon exceed the total electricity that can be produced. The importance of energy efficient devices can never be over emphasized. We focus on studying device physics and high performance materials such as polymers and BTO to reduce the power consumption. We have been able to reduce the power consumption of a ring modulator to 2.55 fJ/bit(left). The long term goal is to reach Atto-Joule per bit level, which represents the physics limit of electronic and photonic devices and will be the ultimate goal that can be achieved by nano-engineering.
Laser & Photonics Reviews 12, 1700300(2018)
Because of the high index contrast, current silicon photonics based optical phased arrays cannot achieve small beam divergence and large field-of-view simultaneously without increasing fabrication complexity. To resolve the dilemma, we propose an ultra-long waveguide grating antenna formed by placing subwavelength segments within the evanescent field of a conventional strip waveguide. Bound state in the continuum effect is leveraged to suppress the sidewall emission. As a proof of concept, we theoretically demonstrated a millimeter-long through-etched waveguide grating antenna with a divergence angle of 0.081° and a feature size compatible with current silicon photonics foundries.
Subwavelength Structure Enabled ultra-long Waveguide antenna
Optics Express Vol. 29, Issue 10, pp. 15133-15144(2021)
Harbin Institute of Technology(Shenzhen), China
Integrated Photonics Laboratory
Copyright: Integrated Photonics Laboratory
