Large-Scale Terahertz Systems: Sub-wavelength Field and Sub-picosecond Temporal Control for Programmable Terahertz Generation
Abstract
Power generation in the terahertz spectrum has been notoriously challenging due to the limited performance of solid-state materials and devices at these frequencies. While there has been a surge of research work in the past decade focusing on closing the THz gap with efficient chip-scale systems, there still remains a considerable challenge to generate tens of mW of power in the 0.3-1.0 THz range. The overall goal of this project was to investigate new methods of nonlinear synchronization across multiple sources to enable large scale sources to enable beamforming and high power generation at Terahertz, and to allow such systems to enable 2D localization among multiple moving nodes. In this work, 1) We proposed a new method to create time-synchronization across THz oscillator arrays establishing a robust frequency and phase distribution across the entire chip for high power THz generation. We demonstrate the scalable nature of this approach with 4x4 array and spatially combine radiated power. The chip generates a radiated power of -3 dBm with an EIRP of +14 dBm at 416 GHz in a lensless setup using a 65 nm CMOS process. We experimentally demonstrate the beamforming of 30 degrees in both E and H plane. This is the highest EIRP array demonstrated at these frequencies enabled through the mechanism of the scalable synchronization techniques. 2) We demonstrate THz PRISM, a spectrum-to-space mapping methodology to allow simultaneous one-shot localization of multiple mobile wireless nodes with dispersive THz beams across 360-400 GHz.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 19, 2021
- Accession Number
- AD1123734
Entities
People
- Kaushik Sengupta
Organizations
- Trustees of Princeton University