Ultrafast Detection of TeraHertz Radiation with Miniaturized Optomechanical Resonator Driven by Dielectric Driving Force

被引：10

作者：

Liu, Jiawen ^{[1
]}

Chomet, Baptiste ^{[1
]}

Beoletto, Paolo ^{[1
]}

Gacemi, Djamal ^{[1
]}

Pantzas, Konstantinos ^{[2
]}

Beaudoin, Gregoire ^{[2
]}

Sagnes, Isabelle ^{[2
]}

Vasanelli, Angela ^{[1
]}

Sirtori, Carlo ^{[1
]}

Todorov, Yanko ^{[1
]}

机构：

[1] Univ Paris Cite, Sorbonne Univ, Univ PSL, Lab Phys,Ecole Normale Super,ENS,CNRS, F-75005 Paris, France

[2] Univ Paris Sud Paris Saclay, CNRS, Ctr Nanosci & Nanotechnol C2N, F-91120 Palaiseau, France

来源：

ACS PHOTONICS | 2022年 / 9卷 / 05期

关键词：

terahertz detection; terahertz resonator; optomechanics; gradient force; phase-lock loop; Duffing nonlinearity; NANOMECHANICAL SYSTEMS;

D O I：

10.1021/acsphotonics.2c00227

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report on an optomechanical terahertz (THz) meta-atom detector empowered by a dielectric driving force scheme. The meta-atom consists of a suspended half-wavelength THz antenna that sustains high quality factor mechanical modes. The THz radiation is resonantly absorbed by the meta-atom and enforces an optimized photothermal mechanism that produces mechanical oscillations, with a responsivity of 30 pmmiddotnW-1 /3 Hzmiddot nW-1 in terms of amplitude/frequency response. Moreover, in this optomechanical system, THz-induced Duffing nonlinearities can be easily observed. The dielectric driving forces allow the implementation of a frequency phase-lock loop, with a harmonic bandwidth on the order of 1 MHz, and thus, square wave THz signals can be temporally recovered at frequencies up to 100 kHz

引用

页码：1541 / 1546

页数：6

共 29 条

[1] Terahertz band: Next frontier for wireless communications [J].