Laser & Optoelectronics Progress, Volume. 55, Issue 5, 051602(2018)
Controllable Modulation of Surface Plasmon Resonance Wavelength of ITO Thin Films
The tin-doped indium oxide (ITO) thin films are fabricated on the float glass substrates by the direct current (DC) magnetron sputtering method. The ITO thin films with different thicknesses are fabricated by changing the deposition time. As the film thickness gradually increases from 16 nm to 271 nm, the crystallinity is enhanced and the corresponding carrier concentration is increased from 4.79×10 20 cm -3 to 2.41 ×10 21 cm -3. Thus the corresponding surface plasmon resonance (SPR) wavelength blueshifts from 1802 nm to 1204 nm. The controllable modulation of near infrared SPR wavelength within a relatively broad range is realized. The SPR wavelength of the ITO films with different film thicknesses are theoretically calculated by using the Drude free electron gas model, which further confirms that the effective modulation of SPR wavelength is determined by the influence of film thickness on carrier concentration.
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Xinyang Cai, Xinwei Wang, Ruxue Li, Dengkui Wang, Xuan Fang, Dan Fang, Yuping Zhang, Xiuping Sun, Xiaohua Wang, Zhipeng Wei. Controllable Modulation of Surface Plasmon Resonance Wavelength of ITO Thin Films[J]. Laser & Optoelectronics Progress, 2018, 55(5): 051602
Category: Materials
Received: Jan. 12, 2018
Accepted: --
Published Online: Sep. 11, 2018
The Author Email: Wang Xinwei ( wxw4122@cust.edu.cn)