Redshift by Design for Plasmonic Enhancement of Ultrathin Infrared Detectors
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2013
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In order to maximize sensitivity and specific detectivity of photodetectors, one has to ensure optimal light concentration within the active area. We considered light trapping based on surface plasmon resonance (SPR) in infrared detectors for night vision purposes. We investigated redshifting by the replacement of metal with transparent conductive oxides (TCO) like indium tin oxide and zinc oxide. We considered nanoparticle fillers embedded in a thin dielectric host with increased relative permittivity and located at the detector surface. We used finite element method to perform optimization of our plasmonic light trapping structures. Regarding the infrared detectors, we considered epitaxial mercury cadmium telluride devices with a typical active layer thickness of 4-8 micrometers. Our results show that sensitivity and specific detectivity of narrow-bandgap detectors can be significantly enhanced. Even thinner active areas than those conventionally used can be used. Since the overall l...evel of intrinsic noise in a night vision detector (especially generation-recombination noise due to Auger processes) is dependent on the volume of the active region, in our case this noise is suppressed by the same mechanism that ensures sensitivity enhancement. Thus additional improvement of specific detectivity is achieved, which allows for higher operating temperatures of night vision photodetectors.
Izvor:
Progress in Electromagnetics Research Symposium, 2013, 1712-1716Finansiranje / projekti:
- Mikro, nano-sistemi i senzori za primenu u elektroprivredi, procesnoj industriji i zaštiti životne sredine (RS-MESTD-Technological Development (TD or TR)-32008)
Institucija/grupa
IHTMTY - CONF AU - Obradov, Marko AU - Jakšić, Zoran AU - Sarajlić, Milija AU - Randjelović, Danijela PY - 2013 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1245 AB - In order to maximize sensitivity and specific detectivity of photodetectors, one has to ensure optimal light concentration within the active area. We considered light trapping based on surface plasmon resonance (SPR) in infrared detectors for night vision purposes. We investigated redshifting by the replacement of metal with transparent conductive oxides (TCO) like indium tin oxide and zinc oxide. We considered nanoparticle fillers embedded in a thin dielectric host with increased relative permittivity and located at the detector surface. We used finite element method to perform optimization of our plasmonic light trapping structures. Regarding the infrared detectors, we considered epitaxial mercury cadmium telluride devices with a typical active layer thickness of 4-8 micrometers. Our results show that sensitivity and specific detectivity of narrow-bandgap detectors can be significantly enhanced. Even thinner active areas than those conventionally used can be used. Since the overall level of intrinsic noise in a night vision detector (especially generation-recombination noise due to Auger processes) is dependent on the volume of the active region, in our case this noise is suppressed by the same mechanism that ensures sensitivity enhancement. Thus additional improvement of specific detectivity is achieved, which allows for higher operating temperatures of night vision photodetectors. C3 - Progress in Electromagnetics Research Symposium T1 - Redshift by Design for Plasmonic Enhancement of Ultrathin Infrared Detectors SP - 1712 EP - 1716 UR - https://hdl.handle.net/21.15107/rcub_cer_1245 ER -
@conference{ author = "Obradov, Marko and Jakšić, Zoran and Sarajlić, Milija and Randjelović, Danijela", year = "2013", abstract = "In order to maximize sensitivity and specific detectivity of photodetectors, one has to ensure optimal light concentration within the active area. We considered light trapping based on surface plasmon resonance (SPR) in infrared detectors for night vision purposes. We investigated redshifting by the replacement of metal with transparent conductive oxides (TCO) like indium tin oxide and zinc oxide. We considered nanoparticle fillers embedded in a thin dielectric host with increased relative permittivity and located at the detector surface. We used finite element method to perform optimization of our plasmonic light trapping structures. Regarding the infrared detectors, we considered epitaxial mercury cadmium telluride devices with a typical active layer thickness of 4-8 micrometers. Our results show that sensitivity and specific detectivity of narrow-bandgap detectors can be significantly enhanced. Even thinner active areas than those conventionally used can be used. Since the overall level of intrinsic noise in a night vision detector (especially generation-recombination noise due to Auger processes) is dependent on the volume of the active region, in our case this noise is suppressed by the same mechanism that ensures sensitivity enhancement. Thus additional improvement of specific detectivity is achieved, which allows for higher operating temperatures of night vision photodetectors.", journal = "Progress in Electromagnetics Research Symposium", title = "Redshift by Design for Plasmonic Enhancement of Ultrathin Infrared Detectors", pages = "1712-1716", url = "https://hdl.handle.net/21.15107/rcub_cer_1245" }
Obradov, M., Jakšić, Z., Sarajlić, M.,& Randjelović, D.. (2013). Redshift by Design for Plasmonic Enhancement of Ultrathin Infrared Detectors. in Progress in Electromagnetics Research Symposium, 1712-1716. https://hdl.handle.net/21.15107/rcub_cer_1245
Obradov M, Jakšić Z, Sarajlić M, Randjelović D. Redshift by Design for Plasmonic Enhancement of Ultrathin Infrared Detectors. in Progress in Electromagnetics Research Symposium. 2013;:1712-1716. https://hdl.handle.net/21.15107/rcub_cer_1245 .
Obradov, Marko, Jakšić, Zoran, Sarajlić, Milija, Randjelović, Danijela, "Redshift by Design for Plasmonic Enhancement of Ultrathin Infrared Detectors" in Progress in Electromagnetics Research Symposium (2013):1712-1716, https://hdl.handle.net/21.15107/rcub_cer_1245 .