Aleksandr Mikhailovich Prokhorov
Encyclopedia
Alexander Mikhaylovich Prokhorov (11 July 1916 – 8 January 2002) was a Russia
n physicist known for his pioneering research on laser
s and maser
s for which he shared the Nobel Prize in Physics
in 1964 with Charles Hard Townes
and Nikolay Basov
.
, to a family of Russian revolutionaries who emigrated from Russia to escape repression by the tsarist government. In 1923, after the October Revolution
, they returned to Russia. In 1934, Prokhorov entered the Saint Petersburg State University
to study physics. He graduated with honors in 1939 and moved to Moscow to work at the Lebedev Physical Institute
, in the oscillations laboratory headed by academician
N. D. Papaleksi. His research there was devoted to propagation of radio waves in the ionosphere
. At the onset of World War II
in the Soviet Union, in June 1941, he joined the Red Army. During World War II, Prokhorov fought in the infantry, was wounded twice in battles, and was awarded three medals, including the Medal of Valour in 1946. He was demobilized in 1944 and returned to the Lebedev Institute where in 1946 defended his Ph.D. thesis on "Theory of Stabilization of Frequency of a Tube Oscillator in the Theory of a Small Parameter".
called a synchrotron
. He demonstrated that the emission is mostly concentrated in the microwave
spectral range. His results became the basis of his habilitation
on "Coherent Radiation of Electrons in the Synchrotron Accelerator", defended in 1951. By 1950, Prokhorov was assistant chief of the oscillation laboratory. Around that time, he formed a group of young scientists to work on radiospectroscopy of molecular rotations and vibrations, and later on quantum electronics. The group focused on a special class of molecules which have three (non-degenerate) moments of inertia. The research was conducted both on experiment and theory. In 1954, Prokhorov became head of the laboratory. Together with Nikolay Basov
he developed theoretical grounds for creation of a molecular oscillator and constructed such an oscillator based on ammonia. They also proposed a method for the production of population inversion using inhomogeneous electric and magnetic fields. Their results were first presented at a national conference in 1952, but not published until 1954–1955;
In 1955, Prokhorov started his research in the field of electron paramagnetic resonance
(EPR). He focused on relaxation times of ions of the iron group elements in a lattice of aluminium oxide
, but also investigated other, "non-optical", topics, such as magnetic phase transitions in DPPH
. In 1957, while studying ruby
, a chromium
-doped variation of aluminium oxide, he came upon the idea of using this material as an active medium of a laser. As a new type of laser resonator, he proposed, in 1958, an "open type" cavity design, which is widely used today. In 1963, together with A. S. Selivanenko, he suggested a laser using two-quantum transitions. For his pioneering work on lasers and masers, in 1964, he received the Nobel Prize in Physics
shared with Nikolay Basov
and Charles Hard Townes
.
– the most prestigious university in the Soviet Union; the same year, he was awarded the Lenin Prize
. In 1960, he became a member of the Russian Academy of Sciences
and elected Academician in 1966. In 1967, he was awarded his first Order of Lenin
(he received five of them during life, in 1967, 1969, 1975, 1981 and 1986). In 1968, he became vice-director of the Lebedev Institute and in 1971 took the position of Head of Laboratory of another prestigious Soviet institution, the Moscow Institute of Physics and Technology. In the same year, he was elected a member of the American Academy of Arts and Sciences
. Between 1982 and 1998, Prokhorov served as acting director of the General Physics Institute of the Russian Academy of Sciences, and after 1998 as honorary director. After his death in 2002, the institute was renamed the A. M. Prokhorov General Physics Institute of the Russian Academy of Sciences.
In 1969, Prokhorov became a Hero of Socialist Labour, the highest degree of distinction in the Soviet Union for achievements in national economy and culture. He received the second such award in 1986. Starting in 1969, he was the chief editor of the Great Soviet Encyclopedia
. He was awarded the Frederic Ives
Medal, the highest distinction of the Optical Society of America
(OSA), in 2000 and became an Honorary OSA Member in 2001. The same year, he was awarded the Demidov Prize
.
in 1950. In 1983, together with three other academicians – Andrey Tychonoff
, Anatoly Dorodnitsyn and Georgi Skryabin – he signed the famous open letter denouncing Andrei Sakharov
's article in the Foreign Affairs
.
Galina Shelepina in 1941, and they had a son, Kiril, born in 1945. Following his father, Kiril Prokhorov became a physicist in the field of optics and is currently leading a laser-related laboratory at the A. M. Prokhorov General Physics Institute.
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
n physicist known for his pioneering research on laser
Laser
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation...
s and maser
Maser
A maser is a device that produces coherent electromagnetic waves through amplification by stimulated emission. Historically, “maser” derives from the original, upper-case acronym MASER, which stands for "Microwave Amplification by Stimulated Emission of Radiation"...
s for which he shared the Nobel Prize in Physics
Nobel Prize in Physics
The Nobel Prize in Physics is awarded once a year by the Royal Swedish Academy of Sciences. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895 and awarded since 1901; the others are the Nobel Prize in Chemistry, Nobel Prize in Literature, Nobel Peace Prize, and...
in 1964 with Charles Hard Townes
Charles Hard Townes
Charles Hard Townes is an American Nobel Prize-winning physicist and educator. Townes is known for his work on the theory and application of the maser, on which he got the fundamental patent, and other work in quantum electronics connected with both maser and laser devices. He shared the Nobel...
and Nikolay Basov
Nikolay Basov
Nikolay Gennadiyevich Basov was a Soviet physicist and educator. For his fundamental work in the field of quantum electronics that led to the development of laser and maser, Basov shared the 1964 Nobel Prize in Physics with Alexander Prokhorov and Charles Hard Townes.-Early life:Basov was born in...
.
Early life
Prokhorov was born in 1916 in Atherton, QueenslandAtherton, Queensland
Atherton is a town on the Atherton Tablelands of Far North Queensland, Australia. At the 2006 census, Atherton had a population of 7,068.-Roads:...
, to a family of Russian revolutionaries who emigrated from Russia to escape repression by the tsarist government. In 1923, after the October Revolution
October Revolution
The October Revolution , also known as the Great October Socialist Revolution , Red October, the October Uprising or the Bolshevik Revolution, was a political revolution and a part of the Russian Revolution of 1917...
, they returned to Russia. In 1934, Prokhorov entered the Saint Petersburg State University
Saint Petersburg State University
Saint Petersburg State University is a Russian federal state-owned higher education institution based in Saint Petersburg and one of the oldest and largest universities in Russia....
to study physics. He graduated with honors in 1939 and moved to Moscow to work at the Lebedev Physical Institute
Lebedev Physical Institute
The Lebedev Physics Institute of the Russian Academy of Sciences , situated in Moscow, is one of the leading Russian research institutes specializing in physics. It is also one of the oldest research institutions in Russia: its history dates back to a collection of physics equipment established by...
, in the oscillations laboratory headed by academician
Academician
The title Academician denotes a Full Member of an art, literary, or scientific academy.In many countries, it is an honorary title. There also exists a lower-rank title, variously translated Corresponding Member or Associate Member, .-Eastern Europe and China:"Academician" may also be a functional...
N. D. Papaleksi. His research there was devoted to propagation of radio waves in the ionosphere
Ionosphere
The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere...
. At the onset of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
in the Soviet Union, in June 1941, he joined the Red Army. During World War II, Prokhorov fought in the infantry, was wounded twice in battles, and was awarded three medals, including the Medal of Valour in 1946. He was demobilized in 1944 and returned to the Lebedev Institute where in 1946 defended his Ph.D. thesis on "Theory of Stabilization of Frequency of a Tube Oscillator in the Theory of a Small Parameter".
Research
In 1947, Prokhorov started working on coherent radiation emitted by electrons orbiting in a cyclic particle acceleratorParticle accelerator
A particle accelerator is a device that uses electromagnetic fields to propel charged particles to high speeds and to contain them in well-defined beams. An ordinary CRT television set is a simple form of accelerator. There are two basic types: electrostatic and oscillating field accelerators.In...
called a synchrotron
Synchrotron
A synchrotron is a particular type of cyclic particle accelerator in which the magnetic field and the electric field are carefully synchronised with the travelling particle beam. The proton synchrotron was originally conceived by Sir Marcus Oliphant...
. He demonstrated that the emission is mostly concentrated in the microwave
Microwave
Microwaves, a subset of radio waves, have wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz and 300 GHz. This broad definition includes both UHF and EHF , and various sources use different boundaries...
spectral range. His results became the basis of his habilitation
Habilitation
Habilitation is the highest academic qualification a scholar can achieve by his or her own pursuit in several European and Asian countries. Earned after obtaining a research doctorate, such as a PhD, habilitation requires the candidate to write a professorial thesis based on independent...
on "Coherent Radiation of Electrons in the Synchrotron Accelerator", defended in 1951. By 1950, Prokhorov was assistant chief of the oscillation laboratory. Around that time, he formed a group of young scientists to work on radiospectroscopy of molecular rotations and vibrations, and later on quantum electronics. The group focused on a special class of molecules which have three (non-degenerate) moments of inertia. The research was conducted both on experiment and theory. In 1954, Prokhorov became head of the laboratory. Together with Nikolay Basov
Nikolay Basov
Nikolay Gennadiyevich Basov was a Soviet physicist and educator. For his fundamental work in the field of quantum electronics that led to the development of laser and maser, Basov shared the 1964 Nobel Prize in Physics with Alexander Prokhorov and Charles Hard Townes.-Early life:Basov was born in...
he developed theoretical grounds for creation of a molecular oscillator and constructed such an oscillator based on ammonia. They also proposed a method for the production of population inversion using inhomogeneous electric and magnetic fields. Their results were first presented at a national conference in 1952, but not published until 1954–1955;
In 1955, Prokhorov started his research in the field of electron paramagnetic resonance
Electron paramagnetic resonance
Electron paramagnetic resonance or electron spin resonance spectroscopyis a technique for studying chemical species that have one or more unpaired electrons, such as organic and inorganic free radicals or inorganic complexes possessing a transition metal ion...
(EPR). He focused on relaxation times of ions of the iron group elements in a lattice of aluminium oxide
Aluminium oxide
Aluminium oxide is an amphoteric oxide with the chemical formula 23. It is commonly referred to as alumina, or corundum in its crystalline form, as well as many other names, reflecting its widespread occurrence in nature and industry...
, but also investigated other, "non-optical", topics, such as magnetic phase transitions in DPPH
DPPH
DPPH is a common abbreviation for an organic chemical compound 2,2-diphenyl-1-picrylhydrazyl. It is a dark-colored crystalline powder composed of stable free-radical molecules...
. In 1957, while studying ruby
Ruby
A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum . The red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires...
, a chromium
Chromium
Chromium is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also odorless, tasteless, and malleable...
-doped variation of aluminium oxide, he came upon the idea of using this material as an active medium of a laser. As a new type of laser resonator, he proposed, in 1958, an "open type" cavity design, which is widely used today. In 1963, together with A. S. Selivanenko, he suggested a laser using two-quantum transitions. For his pioneering work on lasers and masers, in 1964, he received the Nobel Prize in Physics
Nobel Prize in Physics
The Nobel Prize in Physics is awarded once a year by the Royal Swedish Academy of Sciences. It is one of the five Nobel Prizes established by the will of Alfred Nobel in 1895 and awarded since 1901; the others are the Nobel Prize in Chemistry, Nobel Prize in Literature, Nobel Peace Prize, and...
shared with Nikolay Basov
Nikolay Basov
Nikolay Gennadiyevich Basov was a Soviet physicist and educator. For his fundamental work in the field of quantum electronics that led to the development of laser and maser, Basov shared the 1964 Nobel Prize in Physics with Alexander Prokhorov and Charles Hard Townes.-Early life:Basov was born in...
and Charles Hard Townes
Charles Hard Townes
Charles Hard Townes is an American Nobel Prize-winning physicist and educator. Townes is known for his work on the theory and application of the maser, on which he got the fundamental patent, and other work in quantum electronics connected with both maser and laser devices. He shared the Nobel...
.
Posts and awards
In 1959, Prokhorov became a professor at Moscow State UniversityMoscow State University
Lomonosov Moscow State University , previously known as Lomonosov University or MSU , is the largest university in Russia. Founded in 1755, it also claims to be one of the oldest university in Russia and to have the tallest educational building in the world. Its current rector is Viktor Sadovnichiy...
– the most prestigious university in the Soviet Union; the same year, he was awarded the Lenin Prize
Lenin Prize
The Lenin Prize was one of the most prestigious awards of the USSR, presented to individuals for accomplishments relating to science, literature, arts, architecture, and technology. It was created on June 23, 1925 and was awarded until 1934. During the period from 1935 to 1956, the Lenin Prize was...
. In 1960, he became a member of the Russian Academy of Sciences
Russian Academy of Sciences
The Russian Academy of Sciences consists of the national academy of Russia and a network of scientific research institutes from across the Russian Federation as well as auxiliary scientific and social units like libraries, publishers and hospitals....
and elected Academician in 1966. In 1967, he was awarded his first Order of Lenin
Order of Lenin
The Order of Lenin , named after the leader of the Russian October Revolution, was the highest decoration bestowed by the Soviet Union...
(he received five of them during life, in 1967, 1969, 1975, 1981 and 1986). In 1968, he became vice-director of the Lebedev Institute and in 1971 took the position of Head of Laboratory of another prestigious Soviet institution, the Moscow Institute of Physics and Technology. In the same year, he was elected a member of the American Academy of Arts and Sciences
American Academy of Arts and Sciences
The American Academy of Arts and Sciences is an independent policy research center that conducts multidisciplinary studies of complex and emerging problems. The Academy’s elected members are leaders in the academic disciplines, the arts, business, and public affairs.James Bowdoin, John Adams, and...
. Between 1982 and 1998, Prokhorov served as acting director of the General Physics Institute of the Russian Academy of Sciences, and after 1998 as honorary director. After his death in 2002, the institute was renamed the A. M. Prokhorov General Physics Institute of the Russian Academy of Sciences.
In 1969, Prokhorov became a Hero of Socialist Labour, the highest degree of distinction in the Soviet Union for achievements in national economy and culture. He received the second such award in 1986. Starting in 1969, he was the chief editor of the Great Soviet Encyclopedia
Great Soviet Encyclopedia
The Great Soviet Encyclopedia is one of the largest and most comprehensive encyclopedias in Russian and in the world, issued by the Soviet state from 1926 to 1990, and again since 2002 .-Editions:There were three editions...
. He was awarded the Frederic Ives
Frederic Eugene Ives
Frederic Eugene Ives was a U.S. inventor, born at Litchfield, Connecticut. In 1874–78 he had charge of the photographic laboratory at Cornell University. He moved to Philadelphia, Pennsylvania, where in 1885 he was one of the founding members of the Photographic Society of Philadelphia...
Medal, the highest distinction of the Optical Society of America
Optical Society of America
The Optical Society is a scientific society dedicated to advancing the study of light—optics and photonics—in theory and application, by means of publishing, organizing conferences and exhibitions, partnership with industry, and education. The organization has members in more than 100 countries...
(OSA), in 2000 and became an Honorary OSA Member in 2001. The same year, he was awarded the Demidov Prize
Demidov Prize
The Demidov Prize was a national scientific prize in the Russian Empire awarded annually to the members of the Russian Academy of Sciences. One of the most prestigious and oldest scientific awards in the world, its traditions influenced other awards of this kind including the Nobel Prize...
.
Politics
Prokhorov became member of the Communist PartyCommunist Party of the Soviet Union
The Communist Party of the Soviet Union was the only legal, ruling political party in the Soviet Union and one of the largest communist organizations in the world...
in 1950. In 1983, together with three other academicians – Andrey Tychonoff
Andrey Nikolayevich Tychonoff
Andrey Nikolayevich Tikhonov was a Soviet and Russian mathematician known for important contributions to topology, functional analysis, mathematical physics, and ill-posed problems. He was also inventor of magnetotellurics method in geology. Tikhonov originally published in German, whence the...
, Anatoly Dorodnitsyn and Georgi Skryabin – he signed the famous open letter denouncing Andrei Sakharov
Andrei Sakharov
Andrei Dmitrievich Sakharov was a Soviet nuclear physicist, dissident and human rights activist. He earned renown as the designer of the Soviet Union's Third Idea, a codename for Soviet development of thermonuclear weapons. Sakharov was an advocate of civil liberties and civil reforms in the...
's article in the Foreign Affairs
Foreign Affairs
Foreign Affairs is an American magazine and website on international relations and U.S. foreign policy published since 1922 by the Council on Foreign Relations six times annually...
.
Family
Both of Prokhorov's parents died during World War II. Prokhorov married geographerGeography
Geography is the science that studies the lands, features, inhabitants, and phenomena of Earth. A literal translation would be "to describe or write about the Earth". The first person to use the word "geography" was Eratosthenes...
Galina Shelepina in 1941, and they had a son, Kiril, born in 1945. Following his father, Kiril Prokhorov became a physicist in the field of optics and is currently leading a laser-related laboratory at the A. M. Prokhorov General Physics Institute.
Books
- A. M. Prokhorov (Editor in Chief), J. M. Buzzi, P. Sprangle, K. Wille. Coherent Radiation Generation and Particle Acceleration, 1992, ISBN 0-88318-926-7. Research Trends in Physics series published by the American Institute of Physics Press (presently Springer, New York)
- V. Stefan and A. M. Prokhorov (Editors) DiamondDiamondIn mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...
Science and Technology Vol 1: LaserLaserA laser is a device that emits light through a process of optical amplification based on the stimulated emission of photons. The term "laser" originated as an acronym for Light Amplification by Stimulated Emission of Radiation...
Diamond Interaction. Plasma Diamond Reactors (Stefan University Press Series on Frontiers in Science and Technology) 1999 ISBN 1-889545-23-6. - V. Stefan and A. M. Prokhorov (Editors). DiamondDiamondIn mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...
Science and Technology Vol 2 (Stefan University Press Series on Frontiers in Science and Technology) 1999 ISBN 1-889545-24-4.