End-fire injection of light into high-Q silicon microdisks
Abstrak
High-quality (Q)-factor silicon microdisks are promising platforms for revolutionizing bio-sensing, medical diagnoses, and frequency combs. Nevertheless, their practical applications are hindered by the regular waveguide–resonator coupling configuration, which relies on sophisticated and high-cost nanofabrication. Here, we demonstrate a simple, cost-effective, and counterintuitive mechanism to couple light into a high-Q silicon microdisk. In contrast to the evanescent coupling, the incident light is injected into silicon microdisks through the waveguides directly connected to them. The end-fire injection coefficients and Q factors of waveguide-connected microdisks are around 57% and 2×105–7×105, comparable to conventional microdisks. Importantly, the end-fire injection configuration is quite robust to fabrication deviations and can be simply realized without using electron-beam lithography. Meanwhile, their applications in monitoring nanoparticles and tiny ambient changes have also been explored. This research will route a new way to on-chip biosensors and integrated photonic circuits.
Topik & Kata Kunci
Penulis (8)
Shuai Liu
Wenzhao Sun
Yujie Wang
Xiaoyi Yu
Ke Xu
Yongzhen Huang
S. Xiao
Q. Song
Akses Cepat
- Tahun Terbit
- 2018
- Bahasa
- en
- Total Sitasi
- 40×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1364/OPTICA.5.000612
- Akses
- Open Access ✓