Mircea Cătuneanu
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View article: High‐Performance and Ultrafast Single Germanium Nanowire Photodetectors
High‐Performance and Ultrafast Single Germanium Nanowire Photodetectors Open
Semiconductor nanowire‐based photodetectors with high sensitivity and fast photoresponse in the near‐infrared wavelength range are crucial for applications in light‐wave communication switches, as well as environmental and atmospheric sens…
View article: Demonstration of high-frequency self-pulsing oscillations in an active silicon micro-ring cavity
Demonstration of high-frequency self-pulsing oscillations in an active silicon micro-ring cavity Open
We experimentally investigated the self-pulsing (SP) oscillations induced by the thermo-optic, free carrier, and Kerr nonlinear effects in integrated active silicon microring resonators. We demonstrate high frequency self-pulsing oscillati…
View article: Energy-Efficient Forward-Biased PIN Silicon Mach–Zehnder Modulator With 50 μm Active Phase Shifter Length
Energy-Efficient Forward-Biased PIN Silicon Mach–Zehnder Modulator With 50 μm Active Phase Shifter Length Open
We present the design performance validation of an energy-efficient silicon Mach-Zehnder modulator (MZM) with a forward-biased PIN junction by simulation and experiment. With a length of , the presented MZM exhibits at least four times sma…
View article: On-chip lateral Si:Te PIN photodiodes for room-temperature detection in the telecom optical wavelength bands
On-chip lateral Si:Te PIN photodiodes for room-temperature detection in the telecom optical wavelength bands Open
Photonic integrated circuits require photodetectors that operate at room temperature with sensitivity at telecom wavelengths and are suitable for integration with planar complementary-metal-oxide-semiconductor (CMOS) technology. Silicon hy…
View article: Degenerate optical parametric amplification in CMOS silicon
Degenerate optical parametric amplification in CMOS silicon Open
Silicon is a common material for photonics due to its favorable optical properties in the telecom and mid-wave IR bands, as well as compatibility with a wide range of complementary metal–oxide semiconductor (CMOS) foundry processes. Crysta…
View article: Degenerate optical parametric amplification in CMOS silicon
Degenerate optical parametric amplification in CMOS silicon Open
Silicon is a common material for photonics due to its favorable optical properties in the telecom and mid-wave IR bands, as well as compatibility with a wide range of complementary metal-oxide semiconductor (CMOS) foundry processes. Crysta…
View article: Compact and Energy-Efficient Forward-Biased PN Silicon Mach-Zehnder Modulator
Compact and Energy-Efficient Forward-Biased PN Silicon Mach-Zehnder Modulator Open
A compact device model along with simulations and an experimental analysis of a forward-biased PN junction-based silicon Mach-Zehnder modulator (MZM) with a phase-shifter length of 0.5 mm is presented. By placing the PN junction to a certa…
View article: Thermo Optical Phase Shifter With Low Thermal Crosstalk for SOI Strip Waveguide
Thermo Optical Phase Shifter With Low Thermal Crosstalk for SOI Strip Waveguide Open
The trade-offs of using thermo-optical phase shifter in different standard CMOS silicon-on-insulator (SOI) structures (strip and rib waveguides) are studied. Twelve different thermo-optic phase shifters, considering metal and highly doped …
View article: Thermo-Optic Multistability and Relaxation in Silicon Microring Resonators with Lateral Diodes
Thermo-Optic Multistability and Relaxation in Silicon Microring Resonators with Lateral Diodes Open
We demonstrate voltage-tunable thermo-optic bi- and tri-stability in silicon\nphotonic microring resonators with lateral p-i-n junctions and present a\ntechnique for characterizing the thermo-optic transient response of integrated\noptical…