Mid-infrared spectroscopy for remote gas sensing by Ma, Daorui

“…Potential pollution gases in the atmosphere are supposed to be sensed, monitored, and dealt with accordingly to meet the requirements of environmental protection. Mid-infrared spectroscopy (MIRS) is a mature technology for matter detection. …”
Get full text

Reconstruction of nuclear magnetic resonance spectroscopy with deep learning by Zang, Jiayu

“…Nuclear magnetic resonance (NMR) spectroscopy is widely used as an effective analytical tool for the analysis of chemical substances and proton structures. …”
Get full text

Investigations into elemental analysis using laser induced breakdown spectroscopy by Ilangovan, Rishivarathan

“…This dissertation focuses on enhancing the analytical capabilities of Laser-Induced Breakdown Spectroscopy (LIBS) for liquid samples. LIBS, as a rapid chemical analysis tool, faces specific challenges when applied to liquids due to the low signal levels and the complexity of data processing. …”
Get full text

Machine learning methods for classification of COVID-19 exploiting infrared spectroscopy by Li, Yina

Get full text

Food inspection using high performance quantum cascade laser by He, Yuzhi

“…Through an extensive review of the literature, the author concluded that the late start of mid-infrared spectroscopy has strong advantages for food safety testing. …”
Get full text

Mid-infrared quantum cascade lasers by Chen, Tuoyang

“…Because the operating wavelength of quantum cascade lasers (QCL) can cover Mid-infrared to terahertz wavelengths, they have a wide range of applications in the fields of Astronomical research, remote chemical sensing, security surveillance, secret military weapons detection, spectroscopy, and free space communication. Since its introduction in 1994, quantum cascade lasers have evolved from the initial laboratory principle devices to the most promising semiconductor lasers in the infrared band for practical use. …”
Get full text

Design and characterization of mid-infrared Ge-on-Si resonant devices for sensing applications by Shu, Zhaolin

“…Owing to molecular vibration in the mid-infrared (MIR), there has been growing interest to realize on-chip devices for compact IR spectroscopy. Furthermore, realizing these on-chip MIR devices with CMOS-compatible processes and materials (Si, Ge) could lead to cheaper and miniaturized IR spectroscopic devices. …”
Get full text

Nanoscale Si/SiGe based quantum well infrared photodetectors by Agarwala, Shweta

Get full text

Mid-infrared laser technologies for multiple compound gas sensing by Tao, Yuan

“…The experiment utilizes mid-infrared quantum cascade spectroscopy technology for simultaneous analysis and provides essential parameters for real-time monitoring of NH3 and C2H4 concentrations and chemical reaction analysis. …”
Get full text

Design an InAsN/InP quantum well laser diode working at 4 um by Yang, Yifan

“…There are many applications including research, biomedical surgery, molecular spectroscopy, telecommunications, environmental protection, military and semiconductor industries for semiconductor lasers which is emitting light about 2-5 um known as the MIR range. …”
Get full text

Chiral metasurface for narrowband mid-IR circular dichorism by Dai, Shuqin

“…The results of this study could have significant implications in the field of photonics and spectroscopy. The ability to distinguish between different polarized waves with high accuracy could lead to the development of new optical devices with a broad range of applications. …”
Get full text

Improved extreme learning machine for spectra classification of Covid-19 by Wang, Changyang

“…This study demonstrates the feasibility of using near-infrared spectroscopy based on throat swab sample extracts for the relatively straightforward system classification of COVID-19.…”
Get full text

Modeling of quantum cascade lasers by Shen, Xi Wei

“…As a result, QCLs have found extensive utility in a diverse array of fields including, but not limited to, sensing, spectroscopy, imaging, atmospheric monitoring, security, defense, astronomy, and notably, free-space communications. …”
Get full text

Quantum cascade laser for gas sensing in mid-infrared region by Gao, Yuying

“…In this thesis, we use the Mid-infrared (MIR) tunable External Cavity Quantum Cascade Laser (EC-QCL) with the detection method of Tunable Diode Laser Absorption Spectroscopy (TDLAS) to focus on the absorption spectra of two kinds of VOC gases, acetylene and acetone, as well as a dangerous gas, ammonia. …”
Get full text

Data-driven Li-ion battery health condition assessment by Zhou, Wenhui

“…In order to simplify the complex process of extracting the HIs, in this dissertation, a direct health indicator, Electrochemical Impedance Spectroscopy (EIS), is selected to do the battery health estimation together with the Broad Learning System (BLS). …”
Get full text

High performance mid-infrared electrically pumped semiconductor lasers by Lyu, Xiaomeng

“…From high-resolution spectroscopy to trace gas sensing and medical diagnostics, QCLs have demonstrated their versatility in diverse fields. …”
Get full text

High performance electrically pumped semiconductor lasers by Gao, Mengping

“…After this section, I will learn about spectroscopy and how to measure the performance of a quantum cascade laser. …”
Get full text