Abstract
Terahertz heterodyne receivers with high sensitivity and spectral resolution are crucial for various applications.Here,we present a room-temperature atomic terahertz heterodyne receiver that achieves ultrahigh sensitivity and frequency resolution.At a signal frequency of 338.7 GHz,we obtain a sensitivity of 2.88±0.09 µV·cm-1·Hz-1/2 for electric field measurements.The calibrated linear dynamical range spans approximately 89 dB,ranging from-110dBV/cm to-21dBV/cm.We demodulate a 400 symbol stream encoded in 4-state phase-shift keying,demonstrating excellent phase detection capability.By scanning the frequency of the local oscillator,we realize a terahertz spectrometer with Hz level frequency resolution.This resolution is more than two orders of mag-nitude higher than that of existing terahertz spectrometers.The demonstrated terahertz heterodyne receiver holds promising potential for working across the entire terahertz spectrum,significantly advancing its practical applications.
基金项目
国家重点研发计划(2021YFA1402004)
Key-Area Research and Development Program of Guangdong Province,China(2019B030330001)
Key-Area Research and Development Program of Guangdong Province,China(2020B0301030008)
国家自然科学基金(12225405)
国家自然科学基金(12204182)
国家自然科学基金(U20A2074)
Innovation Program for Quantum Science and Technology(2021ZD0301705)
广东省自然科学基金(2022A1515012026)
NETL
NSTL
万方数据