Recent developments in terahertz quantum cascade lasers for practical applications

L Gao, C Feng, X Zhao - Nanotechnology Reviews, 2023 - degruyter.com
Terahertz (THz) quantum cascade laser (QCL) is an electrically pumped unipolar photonic
device in which light emission takes place due to electronic transitions between subbands …

Terahertz Sources Based on Metrological‐Grade Frequency Combs

E Riccardi, V Pistore, L Consolino… - Laser & Photonics …, 2023 - Wiley Online Library
Broadband metrological‐grade frequency comb (FC) synthesizers with a rich number of
phase locked modes are the ideal sources for quantum sensing and quantum metrology. At …

Sculpting harmonic comb states in terahertz quantum cascade lasers by controlled engineering

E Riccardi, MAJ Guerrero, V Pistore, L Seitner… - Optica, 2024 - opg.optica.org
Optical frequency combs (OFCs), which establish a rigid phase-coherent link between the
microwave and optical domains of the electromagnetic spectrum, are emerging as key high …

Holographic Nano‐Imaging of Terahertz Dirac Plasmon Polaritons in Topological Insulator Antenna Resonators

V Pistore, L Viti, C Schiattarella, Z Wang, S Law… - Small, 2024 - Wiley Online Library
Excitation of Dirac plasmon polaritons (DPPs) in bi‐dimensional materials have attracted
considerable interest in recent years, both from perspectives of understanding their physics …

[HTML][HTML] Two-well injector direct-phonon terahertz quantum cascade lasers

N Lander Gower, S Levy, S Piperno… - Applied Physics …, 2023 - pubs.aip.org
We present an experimental study on a terahertz quantum cascade laser (THz QCL) design
that combines both two-well injector and direct-phonon scattering schemes, ie, a so-called …

Extraction of the electron excess temperature in terahertz quantum cascade lasers from laser characteristics

N Lander Gower, S Levy, S Piperno, SJ Addamane… - …, 2024 - degruyter.com
We propose a method to extract the upper laser level's (ULL's) excess electronic
temperature from the analysis of the maximum light output power (P max) and current …

Sub-terahertz feedback interferometry and imaging with emitters in 130 nm BiCMOS technology

DB But, K Ikamas, C Kołaciński, AV Chernyadiev… - Scientific Reports, 2023 - nature.com
In this work, we present the effect of self-mixing in compact terahertz emitters implemented in
a 130 nm SiGe BiCMOS technology. The devices are based on a differential Colpitts …

Split-well resonant-phonon terahertz quantum cascade laser

S Levy, NL Gower, S Piperno, SJ Addamane… - Optics …, 2023 - opg.optica.org
We present a highly diagonal “split-well resonant-phonon”(SWRP) active region design for
GaAs/Al_0. 3Ga_0. 7As terahertz quantum cascade lasers (THz-QCLs). Negative differential …

Compact terahertz harmonic generation in the Reststrahlenband using a graphene-embedded metallic split ring resonator array

A Di Gaspare, C Song, C Schiattarella, LH Li… - Nature …, 2024 - nature.com
Harmonic generation is a result of a strong non-linear interaction between light and matter. It
is a key technology for optics, as it allows the conversion of optical signals to higher …

All in one‐chip, electrolyte‐gated graphene amplitude modulator, saturable absorber mirror and metrological frequency‐tuner in the 2–5 THz range

A Di Gaspare, EAA Pogna, E Riccardi… - Advanced Optical …, 2022 - Wiley Online Library
Layered 2D materials display unique optical and electrical properties that can enable
manipulation, propagation, and detection of electromagnetic waves over a broad spectral …