THz interferometric imaging using subwavelength plastic fiber based THz endoscopes.
We demonstrate a new reflective imaging technique using continuous-wave THz fiber-endoscopy, in which the sample is placed behind the output of a THz subwavelength plastic fiber and the Fabry Perot interference is formed therein. 3D THz reflective images with a reasonable SNR as well as high lateral and subwavelength axial resolutions are acquired by moving the sample along the axial (z) direction and by 2D scanning the output end of the subwavelength plastic fiber without any focusing medium. By analyzing the axial-position dependent THz signals backward collected by the subwavelength plastic fiber, the THz reflection amplitudes and phases on the sample surface can be successfully reconstructed.
Lu
Ja-Yu
JY
Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, 10617, Taiwan.
Kuo
Chung-Chiu
CC
Chiu
Chui-Min
CM
Chen
Hung-Wen
HW
Hwang
Yuh-Jing
YJ
Pan
Ci-Ling
CL
Sun
Chi-Kuang
CK
D000818:Animals; D002056:Burns / Q000175:diagnosis / Q000473:pathology; D003952:Diagnostic Imaging / Q000379:methods*; D019723:Endoscopes; D005336:Fiber Optic Technology; D007368:Interferometry / Q000295:instrumentation / Q000379:methods; D020959:Polyethylene; D012867:Skin / Q000473:pathology; D013552:Swine
D020959:Polyethylene