Perspectives on optoelectronic oscillators

Abstract

As a paradigmatic microwave photonic resonant system that is capable of producing high-quality self-sustained microwave oscillations, the optoelectronic oscillator (OEO) has been intensively investigated in recent years, and a diversity of new insights and breakthroughs have been proposed and demonstrated. In this perspective, we discuss the recent progress, opportunities, and challenges of OEOs. Specifically, an overview of different OEO schemes for single-frequency and complex microwave signal generation is provided. Emerging advances in integrated OEO and applications of OEO are briefly reviewed. We also discuss the remaining challenges and opportunities in this field.

Plasmonic Architectures Boosting Performance in Terahertz Photodetectors

“…(i) Comparison of the NEP under different frequencies with other detectors based on 2D materials, including graphene, [29,30,40,41] ZrGeSe, [36] PdSe 2 , [34] TaSe 2 , [32] PtTe 2 , [31] BP, [39,42,43] Ta 2 NiSe 5 , [44] and HgTe. [45] contrast, the response of device G is significantly stronger than that of the device A.…”

“…(f) Comparison of the voltage responsivity of devices A-H. (g-h) Voltage noise spectra and NEP of device H at different gate voltages. (i) Comparison of the NEP under different frequencies with other detectors based on 2D materials, including graphene,[29,30,40,41] ZrGeSe,[36] PdSe 2 ,[34] TaSe 2 ,[32] PtTe 2 ,[31] BP,[39,42,43] Ta 2 NiSe 5 ,[44] and HgTe [45].…”

Reversible phase transition and thermochromic response in hybrid copper-based perovskites

“…Thermal-stimulated phase transition materials can be used in various smart devices, including signal processors, switches, and memory devices. [13][14][15][16][17][18][19] It is interesting to note that the physical properties of switchable dielectric materials change significantly when external stimuli are applied, including electric fields, temperature, and light. [20][21][22][23][24][25][26][27][28][29] Furthermore, it has been shown that a scientifically designed and tuned organic cation enables the material to have multiple properties, including ferroelectricity, pyroelectricity and piezoelectricity.…”