Recent Developments of an Opto-Electronic THz Spectrometer for High-Resolution Spectroscopy

Hindle, Francis; Yang, Chun; Mouret, G.; Cuisset, Arnaud; Bocquet, Rachel; Lampin, Jean‐François; Blary, K.; Peytavit, E.; Akalin, T.; Ducournau, Guillaume

doi:10.3390/s91109039

Cited by 28 publications

(9 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the THz signal is extremely weak in the order of >10 μW [26], an lock-in amplifier (LIA) is used to extract the signal from the thermal background. Due to the coherent and gated detection nature of the THz-TDS technique, the signals are almost unmasked by the thermal background noise.…”

Section: Time-domain Terahertz Spectroscopy In Reflection Geometrymentioning

confidence: 99%

Terahertz Spectroscopy for Gastrointestinal Cancer Diagnosis

Wahaia¹,

Kašalynas²,

Valušis³

et al. 2017

Terahertz Spectroscopy - A Cutting Edge Technology

View full text Add to dashboard Cite

In this chapter, we present a number of sensitive measurement modalities for the study and analysis of human cancer-affected colon and gastric tissue using terahertz (THz) spectroscopy. Considerable advancements have been reached in characterization of bio-tissue with some accuracy, although too dawn, and still long and exhaustive work have to be done towards well-established and reliable applications. The advent of the THz-time-domain spectroscopy (THz-TDS) test modality at a sub-picosecond time resolution has arguably fostered an intensive work in this field's research line. The chapter addresses some basic theoretical aspects of this measurement modality with the presentation of general experimental laboratory setup diagrams for THz generation and detection, sample preparation aspects, samples optical parameters calculation procedures and data analysis.

show abstract

Section: Time-domain Terahertz Spectroscopy In Reflection Geometrymentioning

confidence: 99%

Terahertz Spectroscopy for Gastrointestinal Cancer Diagnosis

Wahaia¹,

Kašalynas²,

Valušis³

et al. 2017

Terahertz Spectroscopy - A Cutting Edge Technology

View full text Add to dashboard Cite

show abstract

“…By employing three different resonators the signal is greatly enhanced. This high sensitivity allows one to excite the sensor with low-power photomixing sources [10] operating at room temperature. Moreover we avoid the use of large, cooled photodetectors by transducing the signal.…”

Section: Introductionmentioning

confidence: 99%

Proposal for an integrated silicon-photonics terahertz gas detector using photoacoustics

Verstuyft¹,

Akiki²,

Walter³

et al. 2020

Opt. Express

Self Cite

View full text Add to dashboard Cite

A design and multiphysical model is presented for an on-chip gas sensor that transduces terahertz gas absorption through sound generation into a mechanical motion that can be read out externally. The signal is triply enhanced by designing a structure that functions simultaneously as an optical, an acoustical and a mechanical resonator. The structure is made in high-resistivity silicon and can be fabricated using CMOS and MEMS fabrication technologies. The sensor is a purely passive element, so an external THz source and read-out are required. The chip has a footprint of 3 mm 2. A detection limit of 234 ppb of methanol for a source power of 1 mW and an integration time of 1 ms is predicted.

show abstract

“…A 60 cm simple-pass cell and a 4 K He-cooled silicon bolometer were used to record the ground state rotational lines of H 2 CO in the 0.7-1.8 THz frequency region. For the weaker rotational absorptions in the excited vibrational states, longer optical paths of up to 8.8 m were attained using a White-type multipass cell [13]. For these measurements, a room temperature Schottky diode detection was used for the transition frequencies below 0.8 THz.…”

Section: Introductionmentioning

confidence: 99%