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VERSION:2.0
PRODID:Icfo
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:6a972c9c386e8
DTSTART:20260903T100000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20260903T110000Z
LOCATION:Seminar Room
SUMMARY:ICFO | KOSTAS KANELLOPULOS
CLASS:PUBLIC
DESCRIPTION:Room-temperature optical absorption spectroscopy is a powerful 
 tool for material identification and characterization. Over the last decad
 e\, increasing efforts have been devoted to extending absorption spectrosc
 opy to the detection of individual molecules and nanoparticles. However\, 
 conventional approaches still face significant challenges in achieving the
  sensitivity required to probe a single absorber. Nanomechanical photother
 mal sensing has recently emerged as an alternative spectroscopy platform\,
  offering a highly sensitive\, label-free\, and broadband approach that ad
 dresses some of the limitations of state-of-the-art optical techniques. In
  this scheme\, optical absorption induces photothermal heating of a nanome
 chanical resonator\, which is detected through the resulting shift in its 
 mechanical resonance frequency.\nIn this talk\, I will present my work on 
 nanomechanical photothermal sensing\, discussing the current state of the 
 art\, the main challenges limiting its performance\, and future perspectiv
 es. In particular\, I will focus on three aspects: (i) the capabilities of
  state-of-the-art nanomechanical photothermal spectroscopy\, illustrated t
 hrough a case study on individual gold nanorods\; (ii) our current underst
 anding of the fundamental factors governing sensor performance\; and (iii)
  the use of this approach for the characterization of photonic materials\,
  including the effect of mechanical stress on their optical absorption.\nF
 inally\, I will briefly introduce our latest results on infrared and terah
 ertz detection with nanomechanical resonators and compare their performanc
 e with other state-of-the-art detector technologies.
DTSTAMP:20260901T195052Z
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