Other

US Government As Represented by the Secretary of the Army

Dwight Woolard

Thomas E Koscica

Hong-Liang Cui

David L Rhodes

Alan C Samuels

Janet L Jensen

William R Loerop

James O Jensen

Harry Salem

Peiji Zhao

Disclosed is a method of determining causes of intrinsic oscillations in a double-barrier quantum-well intrinsic oscillator comprising developing an emitter quantum-well (EQW) from a double-barrier quantum-well system (DBQWS); coupling the EQW to a main quantum-well (MQW), wherein the MQW is defined by double-barrier heterostructures of a resonant tunneling diode; using energy subband coupling to induce quantum-based fluctuations in the EQW; creating intrinsic oscillations in electron density and electron current in the DBQWS; forming a distinct subband structure based on the intrinsic oscillations; and identifying a THz-frequency signal source based on the quantum-based fluctuations, wherein the intrinsic oscillations comprise maximum subband coherence, partial subband coherence, and minimum subband coherence, wherein the energy subband is a quantum mechanical energy subband, wherein the intrinsic oscillations occur proximate to a bias voltage point in the range of 0.224 V and 0.280 V, and wherein current oscillations are stable proximate to the bias voltage point.

Multi-subband criterion for the design of a double-barrier quantum-well intrinsic oscillator

Methods and apparatus for measuring the millimeter or submillimeter wave absorption spectra in a sample of DNA molecules are provided.

Methods and apparatus for detecting lesion-induced resonances in deoxyribonucleic acid via millimeter or submillimeter wave spectroscopy

Growing community of inventors

Raleigh, NC, United States of America

Dwight Woolard