[13p-B508-1~21] 3.9 Terahertz technologies

[13p-B508-13] Separation analysis combined with THz spectroscopic detection: Sensitivity improvement with an AR-coated DAST crystal and thin wall-capillaries

〇Keiko Kitagishi¹, Kazunori Serita¹, Hirohisa Uchida^2,3, Chisa Koyama³, Takeshi Takagi³, Takayuki Kawai⁴, Masayoshi Tonouchi¹ (1.Osaka Univ., 2.Nagoya Univ., 3.ARKRAY Inc., 4.RIKEN BDR)

Keywords:DAST crystal, capillary electrophoresis, near-field terahertz spectroscopy

In order to improve the sensitivity of near-field THz spectroscopic detection for capillary electrophoresis, two attempts have been applied. The first, AR-coated DAST crystal was used as a THz-wave source. The second, thin wall-capillaries etched by HF around detection position were applied. Both trials were recognized to bring the sensitivity enhancement.