Bachelor of Technology, Indian Institute of Technology, Kharagpur, ECE (2011)
Doctor of Philosophy, Cornell University (2017)
- Broadband enhancement of thermal radiation OPTICS EXPRESS 2019; 27 (12): A818–A828
- Loss of polarization of elliptically polarized collapsing beams PHYSICAL REVIEW A 2019; 99 (3)
- Experimental Demonstration of Dynamical Input Isolation in Nonadiabatically Modulated Photonic Cavities ACS PHOTONICS 2019; 6 (1): 162–69
- Pulse shortening in an actively mode-locked laser with parity-time symmetry APL PHOTONICS 2018; 3 (8)
On-chip dual-comb source for spectroscopy.
2018; 4 (3): e1701858
Dual-comb spectroscopy is a powerful technique for real-time, broadband optical sampling of molecular spectra, which requires no moving components. Recent developments with microresonator-based platforms have enabled frequency combs at the chip scale. However, the need to precisely match the resonance wavelengths of distinct high quality-factor microcavities has hindered the development of on-chip dual combs. We report the simultaneous generation of two microresonator combs on the same chip from a single laser, drastically reducing experimental complexity. We demonstrate broadband optical spectra spanning 51 THz and low-noise operation of both combs by deterministically tuning into soliton mode-locked states using integrated microheaters, resulting in narrow (<10 kHz) microwave beat notes. We further use one comb as a reference to probe the formation dynamics of the other comb, thus introducing a technique to investigate comb evolution without auxiliary lasers or microwave oscillators. We demonstrate high signal-to-noise ratio absorption spectroscopy spanning 170 nm using the dual-comb source over a 20-μs acquisition time. Our device paves the way for compact and robust spectrometers at nanosecond time scales enabled by large beat-note spacings (>1 GHz).
View details for PubMedID 29511733
View details for PubMedCentralID PMC5834308
Quantum interference between transverse spatial waveguide modes.
2017; 8: 14010
Integrated quantum optics has the potential to markedly reduce the footprint and resource requirements of quantum information processing systems, but its practical implementation demands broader utilization of the available degrees of freedom within the optical field. To date, integrated photonic quantum systems have primarily relied on path encoding. However, in the classical regime, the transverse spatial modes of a multi-mode waveguide have been easily manipulated using the waveguide geometry to densely encode information. Here, we demonstrate quantum interference between the transverse spatial modes within a single multi-mode waveguide using quantum circuit-building blocks. This work shows that spatial modes can be controlled to an unprecedented level and have the potential to enable practical and robust quantum information processing.
View details for PubMedID 28106036
View details for PubMedCentralID PMC5263888