BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Investigating the dielectric properties of the cornea and tympanic
  membrane using Synchrotron ATR and transmission at THz frequencies
DTSTART;VALUE=DATE-TIME:20211125T072500Z
DTEND;VALUE=DATE-TIME:20211125T072600Z
DTSTAMP;VALUE=DATE-TIME:20260310T132545Z
UID:indico-contribution-4206@events01.synchrotron.org.au
DESCRIPTION:Speakers: Negin Foroughimehr (Swinburne University of Technolo
 gy)\nHigh GHz and THz frequencies are becoming important in the communicat
 ion\, security\, and industrial fields. With the increasing use of THz tec
 hnology\, the skin\, cornea\, and tympanic membrane will be subjected to i
 ncreased incidental and purposeful THz radiation. There is an urgent need 
 to adequately characterise the way the cornea and tympanic membrane intera
 ct with THz radiation to understand potential THz exposure hazards and ref
 ine dosimetry guidelines. The understanding of the complex permittivity of
  the cornea and tympanic membrane at THz frequencies may lead to the devel
 opment of THz-based diagnostic techniques and therapeutic techniques based
  on the differences of permittivity at THz between normal and pathological
  states.\n\nTHz is highly absorbed by liquid water. The cornea and tympani
 c membrane are “high bulk water content” tissues (over 70% water).  We
  have devised innovative approaches to interrogate biological samples with
  attenuated total reflection (ATR) apparatus at THz frequencies at THz/far
 -infrared beamline in the Australian Synchrotron. One new method extends t
 he capabilities of the ATR apparatus to a partial reflection/partial trans
 mission mode (APR). A second method was to vary the temperature of biologi
 cal tissues whilst continually scanning the sample. The combination of the
  methods brought a very accurate determination of the temperature-dependen
 t variation of the refractive index. The last technique extends the useful
  range of the apparatus to exploring samples with refractive index beyond 
 the maximum possible with attenuated total reflection\, bringing water-bas
 ed biological samples within the capacity of the diamond crystal ATR at th
 e Australian Synchrotron.\n\nhttps://events01.synchrotron.org.au/event/146
 /contributions/4206/
LOCATION:Online
URL:https://events01.synchrotron.org.au/event/146/contributions/4206/
END:VEVENT
END:VCALENDAR