Electrodynamical Characteristics of α-Lactose Monohydrate in the Terahertz Range

Komandin, G. A.; Gavdush, A. A.; Goncharov, Yu. G.; Porodinkov, O. E.; Nozdrin, V. S.; Chuchupal, S. V.; Spektor, I. E.

doi:10.1134/s0030400x1905014x

Cited by 28 publications

(8 citation statements)

References 19 publications

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“…Next, we used the STRING platform to demonstrate spectrally selective fingerprinting from a single-coaxial-ring aperture filled with a mixture of two disaccharides. α-Lactose comprises galactose and glucose bridged by a α-(1→4) glycosidic linkage, while maltose consists of two units of glucose linked with an α-(1→4) bond . Both are isomers that possess rotational modes such as twisted and torsional modes in their linkages that could be detected in the THz domain.…”

Section: String Instruments and Resonance Tuningmentioning

confidence: 99%

“…α-Lactose comprises galactose and glucose bridged by a α-(1→4) glycosidic linkage, while maltose consists of two units of glucose linked with an α-(1→4) bond. 47 Both are isomers that possess rotational modes such as twisted and torsional modes in their linkages that could be detected in the THz domain. To target such vibrational modes that were identified from pelletized lactose and maltose samples (∼0.53 THz for lactose and ∼1.12 THz for maltose; see Figure S1b), we optimized the coaxial ring dimensions as described above to 70 and 40 μm diameter for lactose and maltose, respectively, with a gap width of 1 μm (see Figure 3 and Figure S9).…”

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confidence: 99%

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Subwavelength Terahertz Resonance Imaging (STRING) for Molecular Fingerprinting

Yoo

Heo

et al. 2022

Nano Lett.

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Subwavelength terahertz (THz) imaging methods are highly desirable for biochemical sensing as well as materials sciences, yet sensitive spectral fingerprinting is still challenging in the frequency domain due to weak light−matter interactions. Here, we demonstrate subwavelength THz resonance imaging (STRING) that overcomes this limitation to achieve ultrasensitive molecular fingerprinting. STRING combines individual ringshaped coaxial single resonators with near-field spectroscopy, yielding considerable sensitivity gains from both local field enhancement and the near-field effect. As an initial demonstration, we obtained spectral fingerprints from isomers of α-lactose and maltose monohydrates, achieving sensitivity that was enhanced by up to 10 orders of magnitude compared to far-field THz measurements with pelletized samples. Our results show that the STRING platform could enable the development of THz spectroscopy as a practical and sensitive tool for the fingerprinting and spectral imaging of molecules and nanoparticles.

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Section: String Instruments and Resonance Tuningmentioning

confidence: 99%

mentioning

confidence: 99%

Subwavelength Terahertz Resonance Imaging (STRING) for Molecular Fingerprinting

Yoo

Heo

et al. 2022

Nano Lett.

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“…Hungrana KFT" (Венгрия). Спектры пропускания и фазового сдвига в ТГц диапазоне измерены на лабораторном спектрометре с временным разрешением (TDS) [5,6,22].…”

Section: экспериментальное исследование и моделирование спектровunclassified

“…Известно также наличие пиков поглощения на более высоких частотах [21]. В целом спектр электродипольных возбуждений α-LM при комнатной температуре может быть описан суммой высокодобротных резонансных линий, уширенных полос поглощения и квазирелаксационного фона [22].…”

Section: Introductionunclassified

Температурная эволюция диэлектрического отклика alpha-лактозы моногидрата в терагерцовом диапазоне частот

Командин¹,

Породинков²,

Ноздрин³

et al. 2020

Журнал Технической Физики

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With a change in temperature, a-lactose monohydrate crystals undergo changes in the molecular structure due to dehydration and decay of intramolecular bonds. The transmission spectra of the pressed microcrystalline samples of a-lactose monohydrate were measured using terahertz pulsed spectroscopy in the temperature range of the existence of the solid phase 10 – 475 K. An analysis of the observed absorption lines using the classical oscillator model made it possible to reveal the complex temperature evolution of the eigenfreuencies of the resonances, as well as to determine the region of existence of response phase of a-lactose monohydrate. Data obtained can find practical application in various fields of terahertz optics, including pharmacology, food industry, analytical chemistry and biophotonics.

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“…To date, the terahertz (THz) frequency range has found wide applications in many fields ranging from condensed matter physics [1][2][3][4] and material science 5,6 to gas sensing [7][8][9] and pharmaceutical industry 10 as well as various security [11][12][13][14][15][16] and biomedical [17][18][19][20][21][22] applications. All of these require high-sensitive and broadband THz instruments, in particular, efficient operation in real time and at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Metallic and dielectric metasurfaces in photoconductive terahertz devices: a review

et al. 2019

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This review highlights recent and novel trends focused on metallic (plasmonic) and dielectric metasurfaces in photoconductive terahertz (THz) devices. We demonstrate the great potential of its applications in the field of THz science and technology, nevertheless indicating some limitations and technological issues. From the state-of-the-art, the metasurfaces are, by far, able to force out previous approaches like photonic crystals and are capable of significantly increasing the performance of contemporary photoconductive devices operating at THz frequencies.

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Electrodynamical Characteristics of α-Lactose Monohydrate in the Terahertz Range

Cited by 28 publications

References 19 publications

Subwavelength Terahertz Resonance Imaging (STRING) for Molecular Fingerprinting

Subwavelength Terahertz Resonance Imaging (STRING) for Molecular Fingerprinting

Температурная эволюция диэлектрического отклика alpha-лактозы моногидрата в терагерцовом диапазоне частот

Metallic and dielectric metasurfaces in photoconductive terahertz devices: a review

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