Asset Details
Do you wish to reserve the book?
Ultrafast All‐Optical Switching and Active Sub‐Cycle Waveform Control via Time‐Variant Photodoping of Terahertz Metasurfaces
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Ultrafast All‐Optical Switching and Active Sub‐Cycle Waveform Control via Time‐Variant Photodoping of Terahertz Metasurfaces
Do you wish to request the book?
Ultrafast All‐Optical Switching and Active Sub‐Cycle Waveform Control via Time‐Variant Photodoping of Terahertz Metasurfaces
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Ultrafast All‐Optical Switching and Active Sub‐Cycle Waveform Control via Time‐Variant Photodoping of Terahertz Metasurfaces
2025
Overview
The development of high‐speed and high‐performance optical switches has been a long‐standing issue in the field of photonics. This paper introduces a pioneering time‐resolved spectroscopy‐based approach for realizing photon‐induced ultrafast terahertz (THz) modulation within an electrical split‐ring resonator (SRR) via photoexcitation, rather than relaxation dynamics, in a silicon‐based indirect‐bandgap material. Two competitive effects (shorting of LC circuit and metallization of substrate) occur during photon‐induced THz modulation. The tradeoff between these two effects enables high‐speed optical switching via different time scales of the photoexcitation processes—THz‐optical cooperative effect and phonon‐assisted electron transition. THz‐optical cooperative photoexcitation, causing a shorting effect within the LC circuit, has been observed in the SRR gap, whose size typically exceeds that facilitating impact ionization (IMI). Notably, a remarkably short THz switching time of 1.3 ps has been achieved via only photoexcitation and with a high‐performance transmission intensity modulation depth of over 500%. In addition, active temporal waveform control down to a sub‐cycle pulse has been successfully demonstrated. The proposed approach suggests a new route for constructing high‐speed and efficient THz dynamic photonic devices with potential applications in temporal waveform control. This study introduces a novel time‐resolved spectroscopy approach enabling ultrafast terahertz (THz) modulation in silicon‐based optical switches. Utilizing photon‐induced processes, it achieves a record THz switching time of 1.3 ps and a modulation depth over 500%. The method demonstrates active sub‐cycle pulse control, offering a new pathway for high‐speed, efficient THz photonic devices.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
