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[Lecture] Low-loss integrated photonics in the longwave infrared
Sep. 26, 2023

Speaker: Dingding Ren, Delft university of technology

Time: 20:00-22:00 p.m., September 26, 2023, GMT+8

Venue: Scan the QR code to watch online


The portion of the electromagnetic spectrum known as the longwave infrared (LWIR) region, with a wavelength range between 6 and 14 μm, is commonly referred to as the "molecular fingerprint region." This is attributed to its strong intramolecular fundamental absorption. Moreover, the LWIR region conveniently aligns with the second atmospheric window, rendering it exceptionally well-suited for tasks like chemical identification and environmental monitoring. Notably, at standard room temperature, blackbody emission predominantly occurs within the LWIR wavelengths, imparting invaluable significance to LWIR photonics in various applications, including surveillance, search and rescue missions, and night vision. In my talk, I will present our recent advancements in achieving an optical loss as low as 0.5 dB/cm at 8 µm based on native Ge platform, and the opportunity for achieving broadband microcomb generation in the second atmospheric window.


Dingding Ren is a postdoctoral researcher at TU Deflt, the Netherlands. He was a full-time research faculty from 2020 to 2023 in the Norwegian University of Science and Technology (NTNU), running a three-year research project funded by the Research Council of Norway to develop a low-loss photonic platform in the LWIR. He graduated with a Ph.D. in Electronics and Telecommunications in NTNU with professors Bjørn-Ove Fimland and Helge Weman in 2017. Since 2019, he was a postdoc scientist at professor David Burghoff’s group at the University of Notre Dame.

Source: iCANX