Wavelength Selective Perfect Absorbers for Infrared Devices
DIPC Seminars
- Speaker
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Prof. Tadaaki Nagao, MANA
- When
-
2016/11/23
13:00 - Place
- Donostia International Physics Center
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Plasmonic perfect absorbers can exhibit nearly 100% absorptivity at desired
wavelengths, and have been successfully demonstrated their use such as in
wavelength-selective infrared light emitters and bio sensors [1,2]. We present
our recent work on the development of plasmonic perfect absorbers based on the
metal-insulator-metal structures [1-4]. By use of numerical electromagnetic
simulations, we optimized the geometrical parameters of the perfect absorbers
with resonances at certain wavelengths depending on their applications. The
fabricated perfect absorbers exhibit narrowband resonant absorption with
efficiency a high as 98 %. By tuning their geometrical parameters, the
resonance of the structures can be tuned from far-infrared to mid-infrared
region. We report three applications of the perfect absorbers including
selective thermal emitters [1], selective surface-enhanced vibrational
spectroscopy [2,4] for high-sensitivity molecular sensing, and wavelength
selective IR detectors based on the combination with pyroelectric detector and
the plasmonic absorbers [3].
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**REFERENCES**
1\. T. D. Dao, K. Chen, S. Ishii, A. Ohi, T. Nabatame, M. Kitajima and T.
Nagao, _ACS Photonics_ **2** , 964 (2015).
2\. K. Chen, T. D. Dao, S. Ishii, M. Aono and T. Nagao, _Adv. Funct. Mater._
**25** , 6637 (2015).
3\. T. D. Dao, S. Ishii, T. Yokoyama, T. Sawada, R.Sugavaneshwar, K. Chen, Y.
Wada, A. Ohi, T. Nabatame and T. Nagao, ACS PHOTONICS **3** , 1271 (2016).
4\. T.S. Bui, T.D. Dao, L.H. Dang, L.D. Vu, A. Ohi, T. Nabatame, Y. P. Lee, T.
Nagao, C.V. Hoang, _Scientific Reports_ **6** , Article number: 32123(2016).