Integrated optical filters based on negative-index photonic crystals

Integrated optical modulators based on photonic crystals Gövdeli, Alperen; Kocaman, Serdar; Department of Electrical and Electronics Engineering (2018) Photonic Crystals, artificial optical structures making manipulation of the light possible, have become a popular platform since their first development. Here, such optical components are studied theoretically and their unusual behaviors are utilized for integrated optics components. In particular, ability to change the effective index contribution of photonic crystals is exploited for the design of a low-voltage and area efficient integrated optical modulator. Variety of different aspects are compared betw...
Integrated Optical Modulator Based on Transition between Photonic Bands Gövdeli, Alperen; Sarihan, Murat Can; Karaca, Utku; Kocaman, Serdar (Springer Science and Business Media LLC, 2018-01-26) An area efficient novel optical modulator with low operation voltage is designed based on integrated Mach-Zehnder Interferometer with a photonic crystal slab structure as the phase shifter. Plasma dispersion effect is utilized so that photonic band-to-band transition occurs at the operating frequency leading to a high index change (Delta n = similar to 4) for pi-phase shift on the modulator. This approach reduces the phase shifter length to a few micrometers (similar to 5 mu m) in a silicon on insulator pla...
Integrated optical modulators with zero index metamaterials based on photonic crystal slab waveguides Yildirim, Mustafa; GÖVDELİ, ALPEREN; Kocaman, Serdar (2019-01-01) A novel integrated optical modulator design is presented using zero index metamaterial-based Mach-Zehnder Interferometer with photonic crystal phase shifters. The phase modulation relies on the shift between the photonic bandgaps having non-zero and zero effective refractive indices. A small change in the bulk index results in an effective index change between the arms of the MZI due to the disturbance of the band structure. Thus, such a structure provides a new approach for phase modulation on integrated o...
Integrated piezoresistive sensors for atomic force-guided scanning Hall probe microscopy BROOK, ALEX J; BENDİNG, SJ; PINTO, JONATHAN; Oral, Ahmet; RİTCHİE, DAVİD; BEERE, H; HENİNİ, M; SPRİNGTHORPE, A (AIP Publishing, 2003-05-19) We report the development of an advanced sensor for atomic force-guided scanning Hall probe microscopy whereby both a high mobility heterostructure Hall effect magnetic sensor and an n-Al0.4Ga0.6As piezoresistive displacement sensor have been integrated in a single III-V semiconductor cantilever. This allows simple operation in high-vacuum/variable-temperature environments and enables very high magnetic and topographic resolution to be achieved simultaneously. Scans of magnetic induction and topography of a...
Integrated circuit design for flip-chip bonded capacitive micromachined ultrasonic transducers Maadi, Muhammad; Bayram, Barış; Department of Electrical and Electronics Engineering (2013) In previous decades, the applications of ultrasound technologies in medical imaging and therapeutic systems have significantly increased. In conventional ultrasound systems, the transducer array is separated from the electronic instrumentation with multicore physical cabling. However, connection cables make the system too bulky and degrade the receive sensitivity in ultrasound 3D imaging applications because of the capacitance of long cables. The interface electronics for phased array ultrasound systems (im...

Citation Formats

S. Kocaman, N. Panoiu, M. Lu, and C. W. Wong, “Integrated optical filters based on negative-index photonic crystals,” 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/69440.