PMID- 18545443
OWN - NLM
STAT- MEDLINE
DCOM- 20081112
LR  - 20190516
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 16
IP  - 10
DP  - 2008 May 12
TI  - Material thickness optimization for transmission-mode terahertz time-domain 
      spectroscopy.
PG  - 7382-96
AB  - The thickness of a sample material for a transmission-mode terahertz time-domain 
      spectroscopy (THz-TDS) measurement is the subject of interest in this paper. A 
      sample that is too thick or too thin can raise the problem of measurement 
      uncertainty. Although greater thickness allows the terahertz radiation--or 
      T-rays--to interact more with bulk material, the SNR rolls off with thickness due 
      to signal attenuation. A sample that is too thin renders itself nearly invisible 
      to T-rays, in such a way that the system can hardly sense the difference between 
      the sample and a free space path. The optimal trade-off is analyzed and revealed 
      in this paper, where our approach is to find the optimal thickness that results 
      in the minimal uncertainty of measured optical constants. The derived model for 
      optimal thickness is supported by the results from experiments performed with 
      polyvinyl chloride (PVC), high-density polyethylene (HDPE), and lactose samples.
FAU - Withayachumnankul, Withawat
AU  - Withayachumnankul W
AD  - School of Electrical & Electronic Engineering, The University of Adelaide, 
      Adelaide, SA 5005, Australia. withawat@eleceng.adelaide.edu.au
FAU - Fischer, Bernd M
AU  - Fischer BM
FAU - Abbott, Derek
AU  - Abbott D
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
RN  - 9002-86-2 (Polyvinyl Chloride)
RN  - 9002-88-4 (Polyethylene)
RN  - J2B2A4N98G (Lactose)
SB  - IM
MH  - Algorithms
MH  - Chemistry, Physical/methods
MH  - Equipment Design
MH  - Lactose/chemistry
MH  - Models, Statistical
MH  - Monte Carlo Method
MH  - *Optics and Photonics
MH  - Polyethylene/chemistry
MH  - Polyvinyl Chloride/chemistry
MH  - Reproducibility of Results
MH  - Spectrophotometry/*methods
MH  - Stress, Mechanical
MH  - Time Factors
EDAT- 2008/06/12 09:00
MHDA- 2008/11/13 09:00
CRDT- 2008/06/12 09:00
PHST- 2008/06/12 09:00 [pubmed]
PHST- 2008/11/13 09:00 [medline]
PHST- 2008/06/12 09:00 [entrez]
AID - 159484 [pii]
AID - 10.1364/oe.16.007382 [doi]
PST - ppublish
SO  - Opt Express. 2008 May 12;16(10):7382-96. doi: 10.1364/oe.16.007382.