Ultrafast Quantum Optics

Quantum State Engineering, Hyper-Entanglement, Entanglement Manipulation and Processing on a Chip, Micro-and Nano-Photonics, Ultrafast Quantum Optics,

Ultra-Precise Optical Measurement in Science and Technology (Quantum Metrology), Characterization of organic, polymer, and semiconductor structures used in modern biophysics, nanophotonics, and optoelectronics ,

Quantum Bio-Photonics, Characterization and diagnostic of biological materials and devices for life sciences and proteomics by exploiting the power of entangled-photon states ,

Quantum Information Processing, Quantum Cryptography and Communication, Quantum Networking, Linear Optical Quantum Computing

Quantum Imaging and Correlation Spectroscopy with Superconducting Photon-Counting Detectors

Our main objective is to conduct research at the frontier of quantum optics developing novel biophysics, photonics, and information processing techniques that surpass conventional approaches in the amount of information obtained and in the accuracy of measurement.

Entangled-State Engineering, Entanglement Manipulation and Processing on a Chip, Micro-and Nano-Photonics,Ultrafast Quantum Optics:

Investigation and practical use of nonstationary quantum optics with femtosecond pulses in periodically-modulated nonlinear waveguides and in bulk nonlinear crystals. Integrating sources and optical circuits on a single chip for entanglement creation and manipulation. Development of compact integrated entangled-photon sources by intelligent manipulation of spatial and electrooptical properties of nonlinear crystals. Quantum engineering of specialty entangled states for practical use in characterization and diagnostic of biological and optoelectronics materials, quantum information processing, and quantum metrology. Generation of multiple-photon and hyper-entangled states.

Quantum Bio-Photonics: Characterization and Diagnostic of Biological and Photonic Materials and Devices Using Entangled-Photon States.

Quantum Optical Coherence Tomography (QOCT): do not confuse with tomography of quantum states.

Quantum entanglement protects single-photon wavepackets from dispersive spreading (quantum dispersion cancellation effect) inside the biological tissue and increases resolution in comparison with conventional optical coherence tomography. Characterization of biological samples without photodamage. Obtaining information in a broad spectral range from the visible to mid-infrared using novel supeconducting single-photon detectors.

Quantum Ellipsometry - Biophysics and biochemistry of complex proteins on a surface. Characterization of organic and semiconductor layered structures used in modern optoelectronics.

The main objective of this project is to develop a new approach to characterize parameters of biological and photonics materials in transmission and in reflection configuration using our ability for the sub-femtosecond measurement of optical delay between two orthogonally polarized signal and idler waves in SPDC. This approach can be considered as a quantum counterpart to the conventional optical ellipsometry. The primary motivation is not only to develop a quantum optical material characterization technique which enhances significantly the capability of conventional ellipsometry measurement but to obtain also a detailed information about the interaction of quantum light with modern microscopic systems. Using frequency entanglement and novel supeconducting single-photon detectors enabled us to obtain this information continuously in a broad spectral range from visible to mid-infrared.

Quantum Information and Communication, Quantum Networking: Multiparty secure quantum key distribution (quantum cryptography).

Development of quantum cryptographycally protected communication line in the open air and in the fiber and of the local area network. Principles of quantum mechanics protect the signal from interception and duplication. Future applications are in the most secure communication lines for bank-to-ATM transactions, financial information protection over the internet, and government communications including the use for ship-to-ship, ground-to-satellite, and satellite-to-satellite communication.

Robust Integrated Linear Optical Quantum Computing.

i) Design and practical realization of multiple synchronized sources of photon pairs on a single chip with independently controllable spatial, spectral, and polarization properties. ii) Development of novel sources of narrow-band, polarization-entangled photon pairs at telecom wavelengths for building a distributed network of linear optical quantum information processors. iii) Extending our recent results in quantum communication with decoherence-free subspaces in order to develop robust linear-optical quantum computing techniques in which common sources of error (phase and polarization drift, fluctuations etc.) are mitigated.

Quantum Imaging and Correlation Spectroscopy:

designing imaging configurations for practical applications in high-resolution multi-spectral visualization of biological objects.

Single-photon correlation spectroscopy of biological molecules in the visible and mid-infrared using novel supeconducting single-photon detectors.

Enhancing the signal-to-noise ratio of very low-level optical signals for studies of organic and biological molecules in small concentrations and for the spectroscopy of remote and dilute samples.

Ultra-Precise Optical Measurement in Science and Technology (Quantum Metrology):

High-resolution multi-channel measurement of polarization mode dispersion (PMD) and polarization dependent loss (PDL) in communication fibers and components of optical networks (switches, routers, couplers, multiplexers, etc).

Absolute photon source

To generate exactly known number of photons of specified color (visible or infrared), orientation, and polarization for high-accuracy optical characterization at the ultra-low intensities. Applications in the measurement of sensitivity and spectral response of complex photosensors from human eye to IR night-vision viewer.

Absolute measurement of quantum efficiency of photon counting detectors without any standards.

The NIST level of accuracy is now available at every lab or manufacturing facility. Quantum mechanics is a "democratic" standard.

Measurement of infrared radiation parameters without infrared detectors

and without its absorption (radiation can be used in parallel with the measurement procedure). IR spectrometer without moving parts and IR detectors. Direct evaluation of the IR source temperature. Applications in optical metrology, physical measurements, as well as in industrial and military applications including recognition of unknown infrared signals.

Study of fundamental interactions of quantum light with microscopic systems

such as complex biological molecules, superconducting mesoscopic formations, semiconductor microcavity structures. Quantum tunneling and surface effects. Acquire knowledge to design new biological and optoelectronic devices and to control the manufacturing process.

Sagnac interferometer using entangled photons and enhanced sensitivity gyroscope

for navigation with the dispersion cancellation effect. Fiber sensors. Ultrasensitive measurement of changes in major physical parameters.